If you are interested in interfaces other than eth0 you will need to change eth0 to your interface name. You could use this mammoth to nab the ip4 addresses of all your interfaces perl -e '@_=`ifconfig -a`; sort(@_); foreach(@_) { /(inet addr\:)(\d+.\d+.\d+.\d+ )/; $_=$2; @uniq=grep($_ ne $prev && (($prev) = $_), @_);} print join "\n",@uniq,"\n"; ' it seems silly to have all this code when the following will work fine ifconfig -a | grep "inet " | awk -F":" ' { print $2 } ' | cut -d " " -f1 Show Sample Output

No need $_ netp ;)

This is a joke for @putnamhill and @glaudiston I'm pretty sure we can write longer if we want ;)

If you want all the URLs from all the sessions, you can use : perl -lne 'print for /url":"\K[^"]+/g' ~/.mozilla/firefox/*/sessionstore.js Thanks to tybalt89 ( idea of the "for" statement ). For perl purists, there's JSON and File::Slurp modules, buts that's not installed by default.

print the lines of a file in randomized order Show Sample Output

This command line will display the output of , from the first line of output, until the first time it sees a pattern matching . You could specify the regex pattern /^$/ to look for the first blank line, or /^foobar/ to look for the first line that starts with the word foobar.

Doesn't display the matching line. If you want that behaviour, you need to add "print && " before the 'exit'.

Count the occurences of the word 'Berlekamp' in the DJVU files that are in the current directory, printing file names from the one having the least to the most occurences.

More straightforward. Show Sample Output

Solaris 'ls' command does not have a nice '--full-time' arg to make the time show after a year has passed. So I spit this out quick. It hates spaces in file names. Show Sample Output

I was tired of the endless quoting, unquoting, re-quoting, and escaping characters that left me with working, but barely comprehensible shell one-liners. It can be really frustrating, especially if the local and remote shells differ and have their own escaping and quoting rules. I decided to try a different approach and ended up with this.

Personally, I save this in a one line script called ~/bin/sci: #!/bin/bash for pid in `screen -ls | grep -v $STY | grep tached | awk '{print $1;}' | perl -nle '$_ =~ /^(\d+)/; print $1;'`; do screen -x $pid; done I also use: alias scx='screen -x' alias scl='screen -ls | grep -v $STY'

only output the ip addres. I put double pipe with sed because not parse with operator OR (|) in redex. Show Sample Output

This will show you any links that a command follows (unlike 'file -L'), as well as the ultimate binary or script. Put the name of the command at the very end; this will be passed to perl as the first argument. For obvious reasons, this doesn't work with aliases or functions. Show Sample Output

Function: char * crypt (const char *key, const char *salt) The crypt function takes a password, key, as a string, and a salt character array which is described below, and returns a printable ASCII string which starts with another salt. It is believed that, given the output of the function, the best way to find a key that will produce that output is to guess values of key until the original value of key is found. The salt parameter does two things. Firstly, it selects which algorithm is used, the MD5-based one or the DES-based one. Secondly, it makes life harder for someone trying to guess passwords against a file containing many passwords; without a salt, an intruder can make a guess, run crypt on it once, and compare the result with all the passwords. With a salt, the intruder must run crypt once for each different salt. For the MD5-based algorithm, the salt should consist of the string $1$, followed by up to 8 characters, terminated by either another $ or the end of the string. The result of crypt will be the salt, followed by a $ if the salt didn't end with one, followed by 22 characters from the alphabet ./0-9A-Za-z, up to 34 characters total. Every character in the key is significant. For the DES-based algorithm, the salt should consist of two characters from the alphabet ./0-9A-Za-z, and the result of crypt will be those two characters followed by 11 more from the same alphabet, 13 in total. Only the first 8 characters in the key are significant. Show Sample Output

Parse the output of git status. Once the line '# Changed but not updated:' has passed print every last part of the line if it exists on disk.

perl-based version