Slashdot: News for Nerds


Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!



seL4 Verified Microkernel Now Open Source

marcello_dl Re:Unfortunately? (62 comments)

Man, what a pathetic troll style. Go to usenet and learn.


US States Edge Toward Cryptocoin Regulation

marcello_dl Re:The scammer's dream. (155 comments)

> That's why Bitcoin needs regulation

Regulation doesn't stop scams, it merely makes them more creative. Let's regulate 'till only lawyers can own a business? Scams could be not prevented but undone, by total transparency and traceability, which is easier to implement than you think ("the books have no trace of transactions involving you and this thing? then you don't own it").

But, unfortunately, transparency would expose powerful people and their tricks, so the powerful people allow STASI-like spying and your children groped at the airport, so you rebel and seek comfort in privacy. Checkmate, you lose.

I am against BTC regulation because every time you earn something real or money, from bitcoin or whatever, you should put it in the tax form else you're being dishonest. BTC, like virtual game goodies, fall in this category IMHO.

2 days ago

Microsoft's CEO Says He Wants to Unify Windows

marcello_dl Re:Server 2012 already looks like Windows 8. (322 comments)

You look at trees and miss the forest. Bash deals with unix commands and tools, that means that if I need OOP i can do it in the scripting language of choice, which comes in a no strings attached license. It also means that a one liner can produce a mastered standard video dvd with a transcoded and trimmed video clip.

5 days ago

Russian Government Edits Wikipedia On Flight MH17

marcello_dl Re:cause and/or those responsible (667 comments)

When a civil airliner went down near Ustica, the amount of disinformation and cover up was so extensive that western governments cannot claim they have always had higher standards. The moral responsibility of Italian, US, and possibly other EU countries towards the victims with regards to the truth is there no matter which theory you agree more with.

about a week ago

New Digital Currency Bases Value On Reputation

marcello_dl Re:I have an idea (100 comments)

I see what you redid here.

about two weeks ago

X.Org Server 1.16 Brings XWayland, GLAMOR, Systemd Integration

marcello_dl Re:Systemd? Not on my system... (225 comments)

Indeed debian has extended support for debian 6, we are on debian 7, but systemd-logind is the only thing installed.

On the other hand it is entrenched like the monster in Alien.

# aptitude purge libsystemd-login0

about two weeks ago

ExoLance: Shooting Darts At Mars To Find Life

marcello_dl Re:Implementation details (50 comments)

Uh oh sorry I have another one.
Why sending darts there? Send javascript and wait for the scream.

about two weeks ago

ExoLance: Shooting Darts At Mars To Find Life

marcello_dl Implementation details (50 comments)

For you slashdotters, the two return codes of the experiment:
0: "There is no life here".
1: "There used to be life here, too bad I crashed into it".

about two weeks ago

Ask Slashdot: Future-Proof Jobs?

marcello_dl Re:Plumber (509 comments)

> It's hard to program a machine based on logic to produce complete bullshit.

Why reinvent the wheel? use Windows.

about two weeks ago

OpenWRT 14.07 RC1 Supports Native IPv6, Procd Init System

marcello_dl Re:procd? (71 comments)

Well alpinelinux is already a bit on that route.

about two weeks ago

OpenWRT 14.07 RC1 Supports Native IPv6, Procd Init System

marcello_dl Re:Why not systemd? (71 comments)

Ok so original poster trolled tongue in cheek, grandparent replied seriously, you predict he'd be modded down and he is. Congrats, but you should have wooshed him too.

about two weeks ago

Seat Detects When You're Drowsy, Can Control Your Car

marcello_dl and when it gets to EU cars... (106 comments)

Yo dawg, I herd you like seat, so I put a seat inside your seat so you can be drowsy when you be driving.

about two weeks ago

Finnish National TV Broadcaster Starts Sending Bitcoin Blockchain

marcello_dl Re:now you lose even more money on bc (73 comments)

I guess you didn't read with enough attention. Gold has intrinsic value because it does not depend on a system who says "that piece of paper is worth X". It is not the magic material that solves all problems, of course, but losing the conversion to gold is still LOSING no matter how you put it.

about two weeks ago

Hints of Life's Start Found In a Giant Virus

marcello_dl Re:Yet another proof creation doesn't work! (158 comments)

In absence of gravity, of course, you take two turtles, put one against the other. They will attract each other. Now put all other turtles on these two. Now it's turtles all the way down. So you typed all this when "turtles all the way down" is a completely acceptable answer to parent post.

A god created god ad infinitum, with optional looping, why not? because doesn't fit our infinitesimal brain? That's not a valid objection. A valid objection is that this requires the concept of creation to be valid in all iteration of such a model. But it's not a definitive objection, from our point of view we are unable to make one.

about two weeks ago

Hints of Life's Start Found In a Giant Virus

marcello_dl Re:Yet another proof creation doesn't work! (158 comments)

Compiler error line 1: "what/who", "created", are undefined concepts in the scope you are using them. You don't do that with code, why should you be able to do in philosophical reasonings?

First you define "creation" in the context of the domain of the hypothetical god (hint, you can't tell nothing about ANYTHING in it at all since you cannot experience it and if you could you couldn't prove you did not even to yourself).
Then you define "who" in the context of the domain of the hypothetical god, (hint above applies, plus, no space means "who" can't be identified, that is, told apart the rest).

Religions have it easy. "god told me that... " can mean that a concept, which is potentially incomprehensible in its own domain, gets translated in ours like...
As demigod of a 2d simulation I could say that a cube is like a square. Now it's up to the simulation to believe me or not, truth won't ever be reachable from the inside.

about two weeks ago

Hints of Life's Start Found In a Giant Virus

marcello_dl Re:Yet another proof creation doesn't work! (158 comments)

In general, you can't define anything outside your own level of existence and be sure it makes any sense.

Your objection depends on how our concept of creation behaves in our concept of time, makes no sense too.

But, if we abandon all hope to conclude anything strong, let's go one level of recursion deep: imagine a conway's game of life. what's time for one entity inside it? time is the succession of frames. That succession of frame is independent of our time. It does not matter that some time is needed to compute frames, because that's something that is completely irrelevant to the inside of the game.

Now, your question translated one level deeper in the context of conway's game of life is: how many frames it took to create the game itself? You see it doesn't make any sense. Of course in this context you say "but see, time is needed nonetheless". And I reply, yes, it's a feature of the game itself to resemble some of our concepts. It doesn't prove something like that is necessary in the hypothetical domain of a god that transcends time.

about two weeks ago

Finnish National TV Broadcaster Starts Sending Bitcoin Blockchain

marcello_dl Re:now you lose even more money on bc (73 comments)

Regulations said that the banknote you could exchange back for gold, cannot be anymore. Talk about not getting shafted, intrinsic value vs. depending on a system to tell value from useless paper is a terrible deal.

about two weeks ago

Hints of Life's Start Found In a Giant Virus

marcello_dl Re:Yet another proof creation doesn't work! (158 comments)

> It's just evidence that creation isn't needed to work.

Guys, we are discussing an hypothetical guy residing outside of, and creator of, TIME itself.
You, and all the others, make NO SENSE because you imagine creation IN TIME vs. evolution IN TIME, instead of creation OF Time, the universe, with all its peculiarities like emergent life vs. a patch to introduce life (which seems bad programming style itself, and probably not what the genesis and similar books meant, at all).

If you make a tiny effort and watch things from the POV of a hypothetical god who stands beyond the concept of time, there is no problem in creating a universe with free will agents and knowing how it's going to end up, or in creating an evolving universe that ends up exactly the way you do, or in creating a universe whose time extends indefinitely in both directions and so on.

Face it, creation and evolution are orthogonal issues, just as who and why are orthogonal questions. Those who prefer to pit science against religion, just founded the religion of science and I applaud them on their proliferation effort.

about three weeks ago

Peer Review Ring Broken - 60 Articles Retracted

marcello_dl Re:The Good News? (178 comments)

Besides, who's more peer with respect to the author than the author itself? I tell you, it can't get more peery than this.

about three weeks ago


marcello_dl hasn't submitted any stories.




marcello_dl marcello_dl writes  |  more than 4 years ago

On remote:
# aptitude install tightvncserver

as the user whose desktop you want to share:

$ vncserver

setup passwords, a screen number is issued, usually 1

on local:

# aptitude install xtightvncviewer

as user

$ xtightvncviewer (remote IP address):1
1 is the screen number

notes: killall Xtightvnc kills it on remote


marcello_dl marcello_dl writes  |  more than 4 years ago

First install usb-modeswitch package (debian squeeze - that is, testing at the moment - has it)
Then make sure that the udev initialization is correct:
# Sony Ericsson MD400
# This is experimental. Might switch back after some time. Please report!
# This might work too instead; subject to testing
# Vendor:Product id = 0x0fce:0xd0e1
SUBSYSTEM=="usb", SYSFS{idVendor}=="0fce", SYSFS{idProduct}=="d0e1", RUN+="/usr/sbin/usb_modeswitch --default-vendor 0x0fce --default-product 0xd0e1 -O 1"

Then plug the modem in, make sure it doesn't show up as usb disk, then install wvdial.

A working configuration for italian isp wind is the following:

[Dialer Defaults]
Init1 = ATX3
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CFUN=6
Init4 = AT+CGDCONT=1,"ip","internet.wind"
Phone = *99#
Modem Type = USB Modem
Baud = 460800
New PPPD = yes
Modem = /dev/ttyACM0
ISDN = 0
Password = wind
Username = wind

Line init4 must be adapted to your ISP.
It is important to have the init3 line which turns the radio on. 6 means use HSDPA only, other values might be require if you don't have cover or other subscription, but beware the cost and speed. Why does a modem that works only with radio signals need to explicitly turn on its radio is beyond me. Good luck.


marcello_dl marcello_dl writes  |  more than 4 years ago

in /etc/udev/rules.d/91-permissions.rules, after first line put:
SUBSYSTEMS=="usb", ATTRS{product}=="xxxx", GROUP="scanner"

Note it is SUBSYSTEMS plural
The correct attr can be seen on dmesg, or udevinfo -a -p /sys/class/usb_device/usbdev5
Optionally put vendor too.


marcello_dl marcello_dl writes  |  more than 4 years ago

get and

put them in /var/lib/clamav - or use clamscan -d option?


marcello_dl marcello_dl writes  |  more than 4 years ago

in the zp-core directory create or edit php.ini with entries like
memory_limit = 256M;
upload_max_filesize = 8M;


marcello_dl marcello_dl writes  |  more than 5 years ago

if device=sdb, edit

        #CUSTOM ugly hack
            echo 1024 > /sys/block/sdb/device/max_sectors
            echo 1 > /sys/block/sdb/device/scsi_disk/*/allow_restart


marcello_dl marcello_dl writes  |  more than 6 years ago

First of all, aptitude-upgrading, the debian image still has the random number gen. vulnerability. I went for lenny so i have a recent git and postgresql 8.3

Did tzsetup, and aptitude installed locales
added a normal user

Linode configures with DHCP his servers. Might have advantages but i prefer a static one

iface eth0old inet dhcp

iface eth0 inet static
        address (...)
        gateway (...)

and put a name in /etc/hostname

Then installed arno-iptables-firewall.
Opened ports 80 443 (it's gonna be a server)
FULL_ACCESS_HOSTS="(my machine domain name)"

touch /var/log/firewall

in /etc/syslog.conf kern.* must be changed to kern.!=debug
and the following added:
      # Logging for iptables
      kern.=debug -/var/log/firewall

then /etc/init.d/sysklogd restart

and restart arno firewall

To prevent firewall messages on lish console out add to /etc/init.d/klogd:

KLOGD="-c 4"

And restart that one too.

Better use logrotate too, see

in /etc/logrotate/logrotate.d /var/log/firewall {
                      rotate 7
                      create 0640 root adm

and start logrotate to see if it kinda works /usr/sbin/logrotate /etc/logrotate.conf

Rails server:
installed exim4-daemon-light postgresql lighttpd ruby ruby1.8-dev irb liberb-ruby libpgsql-ruby1.8 libredcloth-ruby1.8 rdoc1.8 libfcgi-ruby1.8 rubygems rake

gem install rails

make sure the correct version for your app is present, too
gem install -v=2.0.2 rails

Postgres users need postgres gem
aptitude install postgresql-server-dev-(version) make

gem install postgres

lighty-enable-module to add fastcgi and ssl
but then removed the entries in conf-enabled dir

# Debian lighttpd configuration file

############ Options you really have to take care of ####################

## modules to load
# mod_access, mod_accesslog and mod_alias are loaded by default
# all other module should only be loaded if neccesary
# - saves some time
# - saves memory

server.modules = (
# "mod_redirect",
# "mod_evhost",
# "mod_usertrack",
# "mod_rrdtool",
# "mod_webdav",
# "mod_flv_streaming",
# "mod_evasive"

## a static document-root, for virtual-hosting take look at the
## server.virtual-* options
server.document-root = "/var/www/"

## where to upload files to, purged daily.
server.upload-dirs = ( "/var/cache/lighttpd/uploads" )

## where to send error-messages to
server.errorlog = "/var/log/lighttpd/error.log"

## files to check for if .../ is requested
index-file.names = ( "index.php", "index.html",
                                                              "index.htm", "default.htm",
                                                              "index.lighttpd.html" )

## Use the "Content-Type" extended attribute to obtain mime type if possible
# mimetype.use-xattr = "enable"

#### accesslog module
accesslog.filename = "/var/log/lighttpd/access.log"

## deny access the file-extensions
# ~ is for backupfiles from vi, emacs, joe, ...
# .inc is often used for code includes which should in general not be part
# of the document-root
url.access-deny = ( "~", ".inc" )

# which extensions should not be handle via static-file transfer
# .php, .pl, .fcgi are most often handled by mod_fastcgi or mod_cgi
static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )

######### Options that are good to be but not neccesary to be changed #######

## Use ipv6 only if available.
#include_shell "/usr/share/lighttpd/"

## bind to port (default: 80)
# server.port = 81

## bind to localhost only (default: all interfaces)
server.bind = "(server's IP)"

## error-handler for status 404
#server.error-handler-404 = "/error-handler.html"
#server.error-handler-404 = "/error-handler.php"

## to help the rc.scripts = "/var/run/"

## Format: .html
## -> ..../status-404.html for 'File not found'
#server.errorfile-prefix = "/var/www/"

## virtual directory listings
dir-listing.encoding = "utf-8"
server.dir-listing = "disable"

## send unhandled HTTP-header headers to error-log
#debug.dump-unknown-headers = "enable"

### only root can use these options
# chroot() to directory (default: no chroot() )
#server.chroot = "/"

## change uid to (default: don't care)
server.username = "www-data"

## change uid to (default: don't care)
server.groupname = "www-data"

#### compress module
compress.cache-dir = "/var/cache/lighttpd/compress/"
compress.filetype = ("text/plain", "text/html", "application/x-javascript", "text/css")

#### url handling modules (rewrite, redirect, access)
# url.rewrite = ( "^/$" => "/server-status" )
# url.redirect = ( "^/wishlist/(.+)" => "$1" )

# define a pattern for the host url finding
# %% => % sign
# %0 => domain name + tld
# %1 => tld
# %2 => domain name without tld
# %3 => subdomain 1 name
# %4 => subdomain 2 name
# evhost.path-pattern = "/home/storage/dev/www/%3/htdocs/"

#### expire module
# expire.url = ( "/buggy/" => "access 2 hours", "/asdhas/" => "access plus 1 seconds 2 minutes")

#### rrdtool
# rrdtool.binary = "/usr/bin/rrdtool"
# rrdtool.db-name = "/var/www/lighttpd.rrd"

#### variable usage:
## variable name without "." is auto prefixed by "var." and becomes ""
#bar = 1
#var.mystring = "foo"

## integer add
#bar += 1
## string concat, with integer cast as string, result: "" = "www." + mystring + + ".com"
## array merge
#index-file.names = (foo + ".php") + index-file.names
#index-file.names += (foo + ".php")

#### external configuration files
## mimetype mapping
include_shell "/usr/share/lighttpd/"

## load enabled configuration files,
## read /etc/lighttpd/conf-available/README first
include_shell "/usr/share/lighttpd/"

#### handle Debian Policy Manual, Section 11.5. urls
## by default allow them only from localhost
## (This must come last due to #445459)
## Note: =~ "" works with ipv6 enabled, whereas == "" doesn't
$HTTP["remoteip"] =~ "" {
        alias.url += (
                "/doc/" => "/usr/share/doc/",
                "/images/" => "/usr/share/images/"
        $HTTP["url"] =~ "^/doc/|^/images/" {
                dir-listing.activate = "enable"

# lighttpd.conf entry to transparently add ssl
#$SERVER["socket"] == "(your server's IP):443" {
# ssl.pemfile = "/var/www/ ... /key-cert.pem"
# = "/var/www/ ... /cacert.pem"
# ssl.engine = "enable"

$HTTP["host"] =~ "(^|\.)hostname$" {

server.error-handler-404 = "/dispatch.fcgi"
server.document-root = "/var/www/ railsapp /public/"

server.errorlog = "/var/www//log/lighttpd.error.log"
accesslog.filename = "/var/www/ railsapp /log/lighttpd.access.log"

url.rewrite = ( "^/$" => "index.html", "^([^.]+)$" => "$1.html" )

compress.filetype = ( "text/plain", "text/html", "text/css", "text/javascript" )
compress.cache-dir = "/var/www/ railsapp /tmp/cache"
expire.url = ( "/favicon.ico" => "access 3 days",
                                                          "/images/" => "access 3 days",
                                                          "/stylesheets/" => "access 3 days",
                                                          "/javascripts/" => "access 3 days" )

fastcgi.server = ( ".fcgi" => ( "localhost" => (
    "min-procs" => 1,
    "max-procs" => 1,
    "socket" => "/var/www/ railsapp /tmp/sockets/fcgi.socket",
    "bin-path" => "/var/www/ railsapp /public/dispatch.fcgi",
    "bin-environment" => ( "RAILS_ENV" => "production" )
) ) )


# su - postgres
now, a user same name of your linux user who own the app
$ createuser (username) -P (give him no special privileges)
$ createdb -E UTF8 (dbname)

edit pg_hba.conf (somewhere in /etc/postgresql/...)
# Put your actual configuration here
# ----------------------------------
# If you want to allow non-local connections, you need to add more
# "host" records. In that case you will also need to make PostgreSQL listen
# on a non-local interface via the listen_addresses configuration parameter,
# or via the -i or -h command line switches.
host (dbname) (www-data = username) trust

Tried copying the rails app(s) to /var/www and work under user www-data

to make changes effective restart postgresql and lighttpd


marcello_dl marcello_dl writes  |  more than 6 years ago

fstab line: //edmini/share /mnt/smb cifs noauto,user=[user],domain=[domain name], 0 0


marcello_dl marcello_dl writes  |  more than 6 years ago

Note, this procedure involves some downtime for the server.
First dump existing databases, e.g.

# su - postgres -c 'pg_dump -C my_database > /tmp/my_database.sql'

If you have user putting content into database this step could be done later, just before importing the sql in the new cluster. Remember to take down db clients if you care for db consistency.

Then install new version, e.g.

# aptitude install postgresql-8.3

when one installs a new version of postgres under debian, the old version stays installed and a new cluster is automatically created. The new version server is configured for an alternative port (5433). Watch for the messages/logs from the package manager.

Then import old users into the new cluster, take into account the listening port run the updated client as the bash command "psql" defaults to the old version.

# su - postgres
# createuser a_user --port 5433

Then copy or update the pg_hba.conf settings to the one in the new cluster in /etc/postgresql/8.3/main/pg_hba.conf

Do not forget to reload the settings.
# /etc/init.d/postgresql-8.3 reload

Then import the databases
# su - postgres
$ /usr/lib/postgresql/8.3/bin/psql --port 5433

Then configure the new server for the existing server port, e.g.
# /etc/init.d/postgresql-8.3 stop
edit /etc/postgresql/8.3/main/postgresql.conf:

Then stop the db clients (eg. it's downtime for my dynamic sites hosted with lighttpd), take down old db, take up new one, restart db clients /etc/init.d/lighttpd stop /etc/init.d/postgresql-8.2 stop /etc/init.d/postgresql-8.3 start
    netstat -nat /etc/init.d/lighttpd start

test the db clients (restart your browser for webapps to avoid using stale session data), if all is well we must remove old postgresql else at reboot it is restarted, conflicting with the newest server version.

Since the debian remove scripts assume the server is up we must take the old server back up- we need to configure the old server for an alternative port so both versions can be up at the same time, e.g.

edit /etc/postgresql/8.3/main/postgresql.conf:

# /etc/init.d/postgresql-8.2 start
# aptitude purge postgresql-8.2

This is all.
Note. It is better to upgrade incrementally than doing it say, from 8.1 to 8.3
There might be ways to reduce downtime, with WAL for example.


marcello_dl marcello_dl writes  |  more than 6 years ago

apt-get install sqlite3 libsqlite3-dev
gem install sqlite3-ruby
of course all ruby dev and rails stuff must be already installed

gem install typo /to be continued
    517 mkdir blog
    518 cd blog/
    519 typo config .
    520 typo config . database=postgresql
    521 ls
    522 ls -a
    523 typo install --help
    524 rm ./* -rf
    525 typo install .
    526 typo stop .
    527 cat installer/lighttpd.conf.example
    528 typo config . database=postgresql
    529 typo config . web-server=external
    530 nano config/database.yml
    531 echo edit pg_hba.conf
    532 echo createdb typo -E UTF8
    533 rake db:migrate
    534 nano config/database.yml
    535 cp ../GaraTiro/config/database.yml config/database.yml
    536 nano config/database.yml
    537 rake db:migrate
    538 echo edit lighttpd.conf
    539 echo "$HTTP["host"] =~ "" {
server.document-root = "/home/jah/apps/typo/trunk/public/"
server.error-handler-404 = "/dispatch.fcgi"
server.indexfiles = ( "dispatch.fcgi")
server.errorlog = "/home/jah/logs/error.typo.log"
    fastcgi.server = ( ".fcgi" =>
          ( "localhost" =>
              ( "socket" => "/home/jah/tmp/typo-jah.socket",
                                                        "min-procs" => 2,
                                                        "max-procs" => 2,
                  "bin-path" => "/home/jah/apps/typo/trunk/public/dispatch.fcgi",
                  "bin-environment" => ( "RAILS_ENV" => "production" )
    540 ls
    541 ls log/
    542 touch log/lighttpd.error.log
    543 typo config . port=80
    544 typo config . rails-environment=development
    545 typo config .
    546 chown marcello:www-data .
    547 #change lighttpd user as same as app


marcello_dl marcello_dl writes  |  more than 6 years ago

As root:

edit /etc/X11/xorg.conf

If no extensions section add one, see below. Add the option anyway.

Section "Extensions"
                Option "Composite" "Enable"

and in Section Devices add

        Option "XAANoOffscreenPixmaps" "true"

add to /etc/apt/sources.list
deb unstable compiz-fusion-git

download the pgp key
wget -O- | apt-key add -


apt-get remove --purge compiz*
aptitude dist-upgrade
apt-get install -t unstable compiz-core compiz-gnome compizconfig-settings-manager compiz-fusion-plugins*

maybe it is needed the following too:
aptitude install 915resolution

As the logged in user, with the graphical desktop already running:
SKIP_CHECKS=yes compiz --replace

One can also install emerald and emerald-themes, possibly purging and reinstalling at every update.


marcello_dl marcello_dl writes  |  more than 6 years ago

Verify you have the modules (recent 2.6 kernel needed stock lenny works)
modprobe -v udf
modprobe -v pktcdvd

aptitude install udftools
put your cdrom device in /etc/default/udftools
e.g. dev/hdX /etc/init.d/udftools restart

cdrwtool -d /dev/hda -q for a cdrw
dvd+rw-format /dev/hdd
and mkudffs /dev/hdd for dvd+rw

mount -t udf -o noauto,noatime,sync,rw,users /dev/pktcdvd/0 /mnt/

Now root is able to write on device, adjust permissions.


marcello_dl marcello_dl writes  |  more than 5 years ago

A spare laptop with no working cdrom and seemingly unable to boot from usb... but with a realtek boot agent. So it's netboot time. Another option is using wuby and install ubuntu right on the ntfs partition along with windows, but then you're back to square one if something happens to the windows installation.

On a debian box used as server:
aptitude install tftpd-hpa dhcp3-server
if you have another dhcp server installed skip dhcp3-server but you have to find the proper config yourself.

edit /etc/default/tftpd-hpa

OPTIONS="-l -s /var/lib/tftpboot"

from your fave debian mirror in dists/etch/main/installer-i386/current/images/netboot/

downloaded netboot.tar.gz, expanded it in /var/lib/tftpboot

For /etc/dhcp3/dhcpd.conf let's assume the tftpd box is in, I have to specify "filename" and "next-server" options- all other options depend on your subnet:

subnet netmask {
        filename "pxelinux.0";
    option subnet-mask;
    option routers;
    option broadcast-address;
    option domain-name-servers [ put here DNS addresses, space separated];

Then restart the services to make changes effective /etc/init.d/tftpd-hpa restart /etc/init.d/dhcp3-server restart

Make sure machines on the subnet can freely access the net to download packages, else the installation won't be very straightforward.

On the box that needs the reinstall chose net boot (usually selectable in the bios and or among boot options menu).

If all goes well the debian boot installer prompt should appear. Only after installation is complete you can stop tftpd server.

BTW on the laptop HAL had to ignore the broken device: put this in /etc/hal/fdi/preprobe , as this blog entry says

<?xml version="1.0" encoding="UTF-8">
<deviceinfo version="0.2">
<match key="block.device" string="/dev/[DEVICE]">
<merge key="info.ignore" type="bool">true</merge>


marcello_dl marcello_dl writes  |  more than 6 years ago

I already had the setup for 802.11b with my home lan

Note this setup is quite sub-optimal as the password is saved in plaintext
The wext driver is for recent 2.6 kernels, works for my ndiswrapper

add to /etc/network/interfaces:

iface wlan0 inet dhcp
                wpa-driver wext
                wpa-ssid "ZyXEL XXXYYY"
                wpa-psk [password plaintext]
# wpa-bssid 00:1a:2b:3c:4d:5e -> not necessary but likely safer
                wpa-key-mgmt WPA-PSK
                wpa-pairwise TKIP CCMP
                wpa-group TKIP CCMP
                wpa-proto WPA RSN


marcello_dl marcello_dl writes  |  more than 6 years ago

while git-svnimport can be used for proper subversion repositories, I had issues with it and a personal svn repository which didn't follow the traditional svn layout with trunk branches tags (shame on me). Well why not simply iterate over the revisions and importing them? Seems to work. Here's how I did it:

first run
svn info [URL of the svn repository you want to migrate]
to discover how many revisions it has till now.

then let's get the commit messages so we can recycle them:

for i in `seq 1 [number of revisions]`; do svn log -r $i [URL of svn repository] > /tmp/svnlog$i.txt; done

svn co --revision 1 [path to the svn repository you want to migrate]
so that a dir with a working copy is created, we'll call it [target git repository]. Now let's migrate all changes:

cd [target git repository]/
echo *.svn >> .git/info/exclude
for i in `seq 1 [number of revisions]`; do cd .. ; svn co --revision=$i [URL of source svn repository] ; cd $OLDPWD ; git add . ; git-commit -a -F /tmp/svnlog$i.txt; done

That should do it. Better do a
git-gc --prune --aggressive
(Do it when nobody else is accessing the new git repository!!!) so that you save space on disk, and a
git clean -d
to get rid of now useless .svn dirs.


marcello_dl marcello_dl writes  |  more than 6 years ago

The cam (an old trust spycam 300) worked under ekiga or gqcam without problems, once the proper stv680 kernel module is installed.

for mplayer one must use the v4l driver specifying outfmt width and height, like this example

mplayer tv:// -tv driver=v4l:device=/dev/video1:outfmt=bgr24:width=320:height=240

Well the pic is upside down, can use -flip option or dunno turn the webcam upside down :)

"webcam" package is quite useful as a poor man cctv. here's a sample config

host = localhost
user = nobody
pass = xxxxxx
dir = /tmp
file = webcam.jpg
tmp = imageup.jpg
local = 1

device = /dev/video1
width = 320
height = 240
delay = 1
wait= 1
norm = pal
quality = 75
trigger = 0

For complex stuff ought to be the choice.


marcello_dl marcello_dl writes  |  more than 7 years ago

Nota: lascio libero chiunque di copiare modificare e riutilizzare il seguente articolo, che rilascio nel pubblico dominio. E' probabile che sul sito del produttore ( si trovino ulteriori informazioni.

La usb pen mi funziona subito come analogico, dopo un po' funziona anche la parte digitale. Presumo sia una questione di caricare il firmware piu' adatto (v. sotto) o di aspettare che il driver maturi.

Per avere a disposizione la usb pen sotto linux bisogna compilarsi i moduli relativi. Quello disponibile con il kernel di etch non la riconosce.

Ho seguito le istruzioni in inglese su

Se non lo si sa, scoprire con
    uname -r
quale versione del kernel si sta usando, nel mio caso

Usare questa informazione per scaricare la versione giusta degli headers:
    aptitude install mercurial linux-headers-2.6.18-4-686 build-essential

Fare copia di sicurezza dei moduli attualmente installati, casomai qualcosa andasse storto

    tar zcvf modulesbackup.tgz -C /lib/modules/ 2.6.18-4-686/

Scaricarsi e installare i moduli aggiornati usando mercurial

    mkdir dvbdriver
    cd dvbdriver/
    hg clone
    cd v4l-dvb-kernel/v4l/
    sudo make install

Scaricarsi il firmware dal sito (non va aggiornato il firmware della penna, va solo scaricato, viene usato dal modulo), a me va anche la versione 4, teoricamente andrebbe la versione 3.

una volta scaricato, scompattarlo in /lib/firmware, es:

    tar xvzf firmware_v4.tgz -C /lib/firmware/

a questo punto riavviare il PC inserendo la usb pen: i messaggi, ottenibili anche col comando dmsg, dovrebbero annunciare che la penna e' riconosciuta ed i moduli relativi caricati, ad esempio:

em28xx v4l2 driver version 0.0.1 loaded
em28xx new video device (eb1a:e310): interface 0, class 255
em28xx: device is attached to a USB 2.0 bus
em28xx: you're using the experimental/unstable tree from
em28xx: there's also a stable tree available but which is limited to
em28xx: linux =
em28xx: it's fine to use this driver but keep in mind that it will move
em28xx: to as soon as it's
em28xx: proved to be stable
em28xx #0: Alternate settings: 8
EEPROM ID= 0x9567eb1a
Vendor/Product ID= eb1a:e310
AC97 audio (5 sample rates)
500mA max power
Table at 0x04, strings=0x226a, 0x0000, 0x0000
tuner 0-0061: chip found @ 0xc2 (em28xx #0)
attach inform (default): detected I2C address c2 /root/dvbdriver/v4l-dvb-kernel/v4l/tuner-core.c: setting tuner callback
tuner 0x61: Configuration acknowledged /root/dvbdriver/v4l-dvb-kernel/v4l/tuner-core.c: setting tuner callback /root/dvbdriver/v4l-dvb-kernel/v4l/xc3028-tuner.c: attach request! /root/dvbdriver/v4l-dvb-kernel/v4l/tuner-core.c: xc3028 tuner successfully loaded
attach_inform: tvp5150 detected.
cs: IO port probe 0x100-0x3af: clean.
cs: IO port probe 0x3e0-0x4ff: clean.
cs: IO port probe 0x820-0x8ff: clean.
cs: IO port probe 0xc00-0xcf7: clean.
cs: IO port probe 0xa00-0xaff: clean.
tvp5150 0-005c: tvp5150am1 detected.
Loading base firmware: xc3028_init0.i2c.fw
Loading default analogue TV settings: xc3028_BG_PAL_A2_A.i2c.fw
xc3028-tuner.c: firmware 2.7
em28xx #0: V4L2 VBI device registered as /dev/vbi0
em28xx #0: V4L2 device registered as /dev/video0
em28xx #0: Found MSI DigiVox A/D
em28xx audio device (eb1a:e310): interface 1, class 1
em28xx audio device (eb1a:e310): interface 2, class 1
usbcore: registered new driver em28xx
usbcore: registered new driver snd-usb-audio
em2880-dvb.c: DVB Init
Loading base firmware: xc3028_8MHz_init0.i2c.fw
Loading default dtv settings: xc3028_DTV8_2633.i2c.fw
xc3028-tuner.c: firmware 2.7
Sending extra call for Digital TV! /root/dvbdriver/v4l-dvb-kernel/v4l/xc3028-tuner.c: attach request!
DVB: registering new adapter (em2880 DVB-T)
DVB: registering frontend 0 (Zarlink ZL10353 DVB-T)...
Em28xx: Initialized (Em2880 DVB Extension) extension

Per vedere se c'e' l'audio della TV:

arecord -l

  card 1: Device [USB 2881 Device], device 0: USB Audio [USB Audio]
      Subdevices: 1/1
      Subdevice #0: subdevice #0

Si può regolare il volume con:

  alsamixer -c 1

premendo tab per scegliere l' input screen

A questo punto la scheda e' pronta, usando ad esempio mplayer, dopo aver verificato che mplayer funzioni con un file video (scelta del -vo adatto, verifica dei permessi per sentire l'audio ecc), per vedere la tv si usa

mplayer -vo xv tv:// -tv chanlist=italy:driver=v4l2:input=0:norm=2:device=/dev/video0:alsa=yes:audiorate=48000:amode=0:forceaudio=yes:adevice=hw.1,0:volume=80:immediatemode=0

(attenzione, inserire tutto su una riga e da chanlist= in poi senza spazi, in caso di dubbi vedersi l'help di mplayer- c'e' anche in italiano)

e usare h e k per provare tutti i canali fino a trovare qualche emittente.

Dopo qualche minuto di ricezione segnale analogico che a quanto pare sblocca la situazione, si puo' provare con il digitale. Consiglio di installare kaffeine, che ha una funzione di scansione canali. L'antennina in dotazione non ha fatto molto per me, collegando all'impianto antenna di casa (n.b. mai adattato al digitale terrestre) invece spuntano i canali, se la zona è servita.

Kaffeine permette di fare pausa del segnale video, registrarlo in mpeg2 (serve spazio su disco), e a quanto mi pare registrare un canale e vederne un'altro purche' appartenga allo stesso "stream".

Una stranezza, appena avviato kaffeine il segnale e' piu' debole, cambiando canale un po' la ricezione migliora. Ritengo sia qualche problema con i comandi dati al sintonizzatore.

Per la tv analogica riesco con mplayer a registrare in divx a 2000kbit e qualche filtro per incrementare la qualita' con un celeron a 1.7 giga. Registrando in mpeg2 o salvando direttamente lo stream (mai provato) si ha minor consumo di cpu e lievemente maggior qualità a scapito della dimensione del file.

Slashdot Account

Need an Account?

Forgot your password?

Don't worry, we never post anything without your permission.

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>
Create a Slashdot Account