Commands by al3x

Commands by al3x (7)

sorted by

List shared libraries recognized by the system

Allows to check if shared library could be dynamically loaded
This is sample output - yours may be different.
0

ldconfig -p | grep <somenewlib.so>

al3x · 2009-02-07 23:15:38 0
Check executable shared library usage

provides list of shared libraries required by executable Show Sample Output
This is sample output - yours may be different.
```
# ldd /bin/bash
        linux-gate.so.1 =>  (0x00ba2000)
        libtermcap.so.2 => /lib/libtermcap.so.2 (0x00484000)
        libdl.so.2 => /lib/libdl.so.2 (0x003c5000)
        libc.so.6 => /lib/libc.so.6 (0x00280000)
        /lib/ld-linux.so.2 (0x0025d000)
```
2

ldd <executable binary>

al3x · 2009-02-07 23:13:40 0
check rpm pkg content w/o installation

allows to check inside rpm file w/o installing it
This is sample output - yours may be different.
0

rpm -qlp <package.rpm>

al3x · 2009-02-07 23:11:59 0
list file descriptors opened by a process

Useful for examining hostile processes (backdoors,proxies)
This is sample output - yours may be different.
1

ls -al /proc/<PID>/fd

al3x · 2009-02-07 22:57:03 0
grep selectively

allows to grep very narrow subset of files
This is sample output - yours may be different.
0

find /path -name \*.php -user nobody -exec grep -nH whatever {} \;

al3x · 2009-02-07 20:53:56 0
fix broken permissions
This is sample output - yours may be different.
4

find /path -type d -perm 777 -exec chmod 755 {} \;

al3x · 2009-02-07 20:51:06 0
find out about a process

Good to find out about hostile processes Show Sample Output
This is sample output - yours may be different.
```
USER=rootLOGNAME=rootHOME=/rootPATH=/usr/bin:/bin:/usr/sbin:/sbinMAIL=/var/mail/rootSHELL=/bin/bashSSH_CLIENT=192.168.8.2 29998 22SSH_CONNECTION=192.168.8.2 29998 192.168.8.12 22SSH_TTY=/dev/pts/0TERM=linuxSSH_AUTH_SOCK=/tmp/ssh-IJZxdX8645/
```
0

cat /proc/<PID>/environ

al3x · 2009-02-07 20:49:19 2

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Rename files in batch

When feeling down, this command helps

$ sudo apt-get install sl $ man sl

Grab a list of MP3s out of Firefox's cache

Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the names of those tunes straight out of FF's cache in a nice, easy to read list. What you do with them after that is *ahem* no concern of mine. ;)

Store dirs to later be changed to independant of the last directory you were in. Also with managment tools.

Check out: help dirs help pushd help popd -- Cheers!

Mostly silent FLAC checking (only errors are displayed)

FLAC's built in integrity checks are far more useful then devising a scheme to use MD5 sum files. This will check all the FLAC in a directory and output only errors. Remove the "s" after the "t" and it will be somewhat verbose in the check.

Install pip with Proxy

Installs pip packages defining a proxy

Query Wikipedia via console over DNS

Extract audio stream from an video file using mencoder

This command extracts the audio stream of the video in $file and stores it in a file where the original suffix is changed to .mp3

Rename HTML files according to their title tag

The above one-liner could be run against all HTML files in a directory. It renames the HTML files based on the text contained in their title tag. This helped me in a situation where I had a directory containing thousands of HTML documents with meaningless filenames.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by al3x

Commands by al3x (7) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands by al3x (7)

sorted by