House of Laudanum » Linux

update-rc.d

mr.snow — Sat, 25 Sep 2010 11:49:54 +0000

So I’ve never had to create a boot job that didn’t suit the defaults but today I did. And it took ages to figure out the `right` way to do it. Mostly because I was not correctly removing the previous entry.

Refresher. Create a boot job with the defaults
$ sudo update-rc.d bloodbath defaults

Ok. It’s not clear that to remove the defaults in order to add different ones. Here is the silver bullet.
$ sudo update-rc.d -f bloodbath remove

And to add them back starting toward the end of boot (90) and stopping towards the end of shutdown (10).
$ sudo update-rc.d bloodbath defaults 90 10

Reverse ssh tunnel for phone home servers on DHCP addresses.

mr.snow — Wed, 08 Sep 2010 05:13:24 +0000

In this example

Destination is puna-o-te-ki dialed up on a 3G Vodafone mobile broadband modem. It gets a DHCP address AND is blocking ssh inbound.

Our Middle server is an always on server behind a NATd network also on a DHCP WAN address. That WAN address is advertised via DynDNS so we know where to look for it.

Our Origin is our laptop – anywhere in the world, also DHCP and NATd.

Create our .ssh/config file

Host house HostName house.dyndns.com Port 2220

Create the ssh DSA key

rossetti@puna-o-te-ki:~$ ssh-keygen -t dsa
Install it on the server in the middle

rossetti@puna-o-te-ki:~$ ssh-copy-id -i ~/.ssh/id_dsa.pub house
Bring up the tunnel
-R reverse tunnel
-N no remote command
-n redirect stdout to /dev/null (required for backgrounding ssh)
-T Disable pseudo-tty allocation

rossetti@puna-o-te-ki:~$ ssh -nNT -R 22002:localhost:22 house
Test the tunnel

rossetti@Wakatipu:~$ ssh localhost -p 22002

Set up client keepalive on the destination server.

rossetti@puna-o-te-ki:~$ cat /etc/ssh/sshd_config TCPKeepAlive yes ClientAliveInterval 300 ClientAliveCountMax 99999
Set up GatewayPorts on the middle server. This allows us to pass through the middle server without ssh in there and then on to the destination. You’ll also need to forward our destination port on the middle servers router/firewall to the middle server.

rossetti@Wakatipu:~$ cat /etc/ssh/sshd_config GatewayPorts yes
Test sshing in from our origin laptop

whale:~ rossetti$ ssh house -p 22002
http://en.gentoo-wiki.com/
http://articles.techrepublic.com.com/

.ssh config.

mr.snow — Thu, 12 Aug 2010 00:25:28 +0000

If you’re forever typing in long ssh commands to get into your servers – here’s a handy shortcut.

$ ssh laudanum@wainui.houseoflaudanum.com -p2222
Translates to
$ ssh wainui

Using this config file.
$ less ~/.ssh/config Host wainui HostName wainui.houseoflaudanum.com User laudanum Port 2222 IdentityFile ~/.ssh/id_rsa

Compiling ffmpeg w/ x264

mr.snow — Tue, 15 Jun 2010 09:43:52 +0000

http://thomer.com/howtos/ipod_video.html

You’ll need your gpg key
whale:~ rossetti$ gpg2 --export-secret-keys -a > secret.asc whale:~ rossetti$ scp secret.asc Wakatipu.local:~/
rossetti@Wakatipu:~$ gpg --import secret.asc

Add the debian-multimedia repository
rossetti@Wakatipu:~$ wget http://www.debian-multimedia.org/pool/main/d/debian-multimedia-keyring/debian-multimedia-keyring_2008.10.16_all.deb rossetti@Wakatipu:~$ sudo dpkg -i debian-multimedia-keyring_2008.10.16_all.deb rossetti@Wakatipu:~$ sudo aptitude update

Install the dependencies
rossetti@Wakatipu:~/installers/ffmpeg/ffmpeg-debian-0.svn20080206$ sudo aptitude install libamrnb3 libx264-dev libxvidcore4-dev libamrwb-dev libamrnb-dev libfaac-dev

Get the ffmpeg sources
rossetti@Wakatipu:~/installers/ffmpeg$ apt-get source ffmpeg

rossetti@Wakatipu:~/installers/ffmpeg$ cd ffmpeg-debian-0.svn20080206/ rossetti@Wakatipu:~/installers/ffmpeg/ffmpeg-debian-0.svn20080206$ vi debian/confflags gpl_confflags += --enable-x11grab gpl_confflags += --enable-nonfree

Configure
rossetti@Wakatipu:~/installers/ffmpeg/ffmpeg-debian-0.svn20080206$ ./configure --enable-gpl --enable-nonfree --enable-pp --enable-pthreads --enable-x11grab --enable-libamr-nb --enable-libamr-wb --enable-libdc1394 --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-zlib

Build
rossetti@Wakatipu:~/installers/ffmpeg/ffmpeg-debian-0.svn20080206$ dpkg-buildpackage -rfakeroot -b -k[gpgkeyid]

The .deb files are created in the parent directory. Install them with dpkg.
rossetti@Wakatipu:~/installers/ffmpeg/ffmpeg-debian-0.svn20080206$ sudo dpkg -i ../*.deb

project: DLNA server for Samsung LED TV

mr.snow — Sun, 13 Jun 2010 10:31:44 +0000

http://forum.buffalo.nas-central.org/viewtopic.php?f=39&t=14986&start=0 rossetti@Wakatipu:~/installers/libdlna-0.2.3$ sudo aptitude install libavformat-dev rossetti@Wakatipu:~/installers/libdlna-0.2.3$ ./configure rossetti@Wakatipu:~/installers/libdlna-0.2.3$ make rossetti@Wakatipu:~/installers/libdlna-0.2.3$ sudo make install


rossetti@Wakatipu:~/installers/ushare-1.1a$ sudo aptitude install libupnp4

rossetti@Wakatipu:~/installers/ushare-1.1a$ ./configure --enable-dlna

Checking for libixml ...

Error, can't find libixml !
rossetti@Wakatipu:~/installers/ushare-1.1a$ whereis libixml

libixml:

rossetti@Wakatipu:~/installers/ushare-1.1a$ sudo aptitude install libupnp4-dev

rossetti@Wakatipu:~/installers/ushare-1.1a$ whereis libixml

libixml: /usr/lib/libixml.a /usr/lib/libixml.la /usr/lib/libixml.so
rossetti@Wakatipu:~/installers/ushare-1.1a$ ./configure --enable-dlna

rossetti@Wakatipu:~/installers/ushare-1.1a$ make
rossetti@Wakatipu:~/installers/ushare-1.1a$ sudo aptitude remove libupnp4 libupnp4-dev

rossetti@Wakatipu:~/installers/ushare-1.1a$ sudo aptitude install libupnp3 libupnp3-dev

rossetti@Wakatipu:~/installers/ushare-1.1a$ ./configure --enable-dlna

rossetti@Wakatipu:~/installers/ushare-1.1a$ make

rossetti@Wakatipu:~/installers/ushare-1.1a$ make install
# re install after applying patches from

# http://forums.cnet.com/5208-13973_102-0.html?threadID=336205
# start server

rossetti@Wakatipu:/home/laudanum$ ushare --dlna --content=media --interface=eth1

# convert mp4 to mkv without transcoding ( samsung supports avi, asf, wmv, mkv ) rossetti@Wakatipu:/home/laudanum/media$ sudo aptitude install mkvtoolnix laudanum@Wakatipu:~/media$ mkvmerge -o alwyn.mkv ALWYN.MP4

No installable kernel was found in the defined APT sources.

mr.snow — Thu, 07 Jan 2010 20:29:50 +0000

Ubuntu server 9.10 on a MicroClient Jr with a USB CD-R via a USB to IDE adapter. Perhaps the CD-R timesout or perhaps the installer isn’t seeing the kernel package. However I get this error.

No installable kernel was found in the defined APT sources.

If I continue I get errors trying to install GRUB and LILO.

This worked before installing GRUB.

Switch to a console (ALT+F3)
Enter to activate

chroot /target

apt-get install kernel-package

apt-get install linux-image-2.6.24-26-generic

Switch back to the installer and continue (ALT+F1)

Running aptitude by itself didn’t seem to show the kernel package as an installation possibility. After various tries the above worked.

http://jordanteam.com/blog/

http://ubuntuforums.org/archive/

Find large files on Debian

mr.snow — Thu, 23 Apr 2009 07:02:34 +0000

from within the directory you wish to search find files larger than 100MB

rossetti@Wakatipu:/media/backup$ sudo find . -type f -size +100000k -exec ls -lh {} \; | awk '{ print $8 ": " $5 }'

The Discreet Charm Of The Bourgeoisie Robot

mr.snow — Thu, 05 Feb 2009 00:29:42 +0000

http://marynowsky.net/bourgeoisie.html

Wade pulled together a small team to build a prototype semi-autonomous robot in a Victorian dress. Our job was to provide an interface between the web and the controller board. We installed a small webserver on an EeePC netbook. An Adobe Flash socket sent mouse clicks and speech instructions to a tiny Python server that interpreted whether the instructions should be forwarded to the controller board or handled by the EeePC. Speech commands were forwarded to the onboard Festival server using an MBROLA english male voice and then piped to the sound card.

Reset Windows password from Linux.

mr.snow — Wed, 04 Feb 2009 07:42:47 +0000

http://rhadimas.wordpress.com/2006/10/15/reset-windows-password-w-knoppix/

knoppix@Knoppix:~$ wget http://ftp.au.debian.org/debian/pool/main/c/chntpw/chntpw_0.99.5-0+nmu1_i386.deb

Extract only the chntpw binary
knoppix@Knoppix:~$ alien --to-tgz chntpw_0.99.5-0+nmu1_i386.deb knoppix@Knoppix:~$ tar xvzf chntpw-0.99.5.tgz ./usr/sbin/chntpw knoppix@Knoppix:~$ mv ./usr/sbin/chntpw ./

Repair and mount a badly unmounted NTFS volume.
knoppix@Knoppix:~$ sudo ntfsfix /dev/hda1 knoppix@Knoppix:~$ sudo mount -o rw /dev/hda1 /media/hda1/

Change the password for the particular user.
knoppix@Knoppix:~$ cd /media/hda1/WINNT/system32/config/ knoppix@Knoppix:/media/hda1/WINNT/system32/config$ /home/knoppix/chntpw -u mini SAM


chntpw version 0.99.5 070923 (decade), (c) Petter N Hagen

Hive  name (from header): <\SystemRoot\System32\Config\SAM>
ROOT KEY at offset: 0x001020 * Subkey indexing type is: 666c 

File size 24576 [6000] bytes, containing 5 pages (+ 1 headerpage)

Used for data: 185/14976 blocks/bytes, unused: 5/5344 blocks/bytes.
* SAM policy limits:

Failed logins before lockout is: 0

Minimum password length        : 0

Password history count         : 0

| RID -|---------- Username ------------| Admin? |- Lock? --|

| 03e8 | ASPNET                         |        |          |

| 01f5 | Guest                          |        | dis/lock |

| 01f4 | mini                           | ADMIN  | dis/lock |

---------------------> SYSKEY CHECK <-----------------------
SYSTEM   SecureBoot            : -1 -> Not Set (not installed, good!)

SAM      Account\F             : 1 -> key-in-registry

SECURITY PolSecretEncryptionKey: -1 -> Not Set (OK if this is NT4)

 

***************** SYSKEY IS ENABLED! **************

This installation very likely has the syskey passwordhash-obfuscator installed

It's currently in mode = -1, Unknown-mode
SYSTEM (and possibly SECURITY) hives not loaded, unable to disable syskey!

Please start the program with at least SAM & SYSTEM-hive filenames as arguments!
RID     : 0500 [01f4]

Username: mini

fullname: 

comment : Built-in account for administering the computer/domain

homedir : 

 

User is member of 1 groups:

00000220 = Administrators (which has 1 members)

Account bits: 0x0210 =

[ ] Disabled        | [ ] Homedir req.    | [ ] Passwd not req. | 

[ ] Temp. duplicate | [X] Normal account  | [ ] NMS account     | 

[ ] Domain trust ac | [ ] Wks trust act.  | [ ] Srv trust act   | 

[X] Pwd don't expir | [ ] Auto lockout    | [ ] (unknown 0x08)  | 

[ ] (unknown 0x10)  | [ ] (unknown 0x20)  | [ ] (unknown 0x40)  | 
Failed login count: 6, while max tries is: 0

Total  login count: 1370
- - - - User Edit Menu:

 1 - Clear (blank) user password

 2 - Edit (set new) user password (careful with this on XP or Vista)

 3 - Promote user (make user an administrator)

 4 - Unlock and enable user account [probably locked now]

 q - Quit editing user, back to user select
Select: [q] > 1

Password cleared!
Hives that have changed:

 #  Name

 0  

Write hive files? (y/n) [n] : y

 0   - OK

knoppix@Knoppix:~$ cd knoppix@Knoppix:~$ umount /media/hda1

Using the `screen` command.

mr.snow — Fri, 30 Jan 2009 09:08:11 +0000

One useful application of screen – ssh in to a computer, run a command that will take a while, disconnect and go home, ssh back in and reconnect to the command you were running.

whale:mediaplayer rossetti$ ssh knoppix@10.0.0.109
knoppix@Knoppix:~$ screen rsync -avvz --numeric-ids /media/hda1/ /media/transit/mini-dell/media/hda1/
[CTRL+A CTRL+D disconnect]
[detached]
knoppix@Knoppix:~$ screen -ls
There is a screen on:
	4489.pts-1.Knoppix	(Detached)
1 Socket in /var/run/screen/S-knoppix.
knoppix@Knoppix:~$ exit
whale:mediaplayer rossetti$ ssh knoppix@10.0.0.109
knoppix@Knoppix:~$ screen -r