Commands using perl

Thanks to comment if that works or not...

If you have already typed that snippet or you know you already have IO::Interface::Simple perl module, you can type only the last command :

( The first perl command will install the module if it's not there already... )

This is a joke for @putnamhill and @glaudiston

I'm pretty sure we can write longer if we want ;)

No need $_ netp ;)

This command prints all lines of a file together with is line number.

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

-p -> loop (same as -n in sed)

-i -> edit files

-e -> execute command

replace Old with New in all *.html files

A shell function using perl to easily convert Unix-time to text.

Put in in your ~/.bashrc or equivalent.

Tested on Linux / Solaris Bourne, bash and zsh. using perl 5.6 and higher.

(Does not require GNU date like some other commands)

Figures out total line contribution per author for an entire GIT repo. Includes binary files, which kind of mess up the true count.

If crashes or takes too long, mess with the ls-file option at the start:

git ls-files -x "*pdf" -x "*psd" -x "*tif" to remove really random binary files

git ls-files "*.py" "*.html" "*.css" to only include specific file types

Based off my original SVN version: http://www.commandlinefu.com/commands/view/2787/prints-total-line-count-contribution-per-user-for-an-svn-repository

List packages and their disk usage in decreasing order. This uses the "Installed-Size" from the package metadata. It may differ from the actual used space, because e.g. data files (think of databases) or log files may take additional space.

not my cmd... found on the web

put it in crontab to get an alert when / is over 89% utilization.

Place the regular expression you want to validate between the forward slashes in the eval block.

same, except it works on any OS with Perl installed. DOS, Windose, whatever

It is not easy to make perl give a segfault, but this does it. This is a known issue but apparently not easy to fix. This is completely useless except for showing people that perl is not bullet-proof.

Uses curl to download page of membership of US Congress. Use sed to strip HTML then perl to print a line starting with two tabs (a line with a representative)

change the *.avi to whatever you want to match, you can remove it altogether if you want to check all files.

The sort utility is well used, but sometimes you want a little chaos. This will randomize the lines of a text file.

BTW, on OS X there is no

option! There is also no

These are only in the newer GNU core...

This is also faster than the alternate of:

the command show can be run in vim, here is the same thing on the command line