Commands by chuckr

Commands by chuckr (3)

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Quick command line math

expr will give you a quick way to do basic math from the CLI. Make sure you escape things like * and leave a space between operators and digits. Show Sample Output
This is sample output - yours may be different.
```
expr 44 + 99 + 128
271
```
4

expr 512 \* 7

chuckr · 2009-09-23 19:11:38 10
Show which include directories your installation of Perl is using.

This will show where your Perl installation is looking for modules.
This is sample output - yours may be different.
0

perl -le 'print join $/, @INC'

chuckr · 2009-09-22 22:18:35 0
Dump all of perl's config info

This dumps all of your installed perl's config information.
This is sample output - yours may be different.
0

perl -le 'use Config; foreach $i (keys %Config) {print "$i : @Config{$i}"}'

chuckr · 2009-09-22 22:14:21 0

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.

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count how many cat processes are running

'ps ax' provides the fill list of running processes. 'grep -c [c]at' will find all processes that match 'cat' without matching itself....

Squish repeated delimiters into one

This can be particularly useful used in conjunction with a following cut command like $echo "hello::::there" | tr -s ':' | cut -d':' -f2 which prints 'there'. Much easier that guessing at -f values for cut. I know 'tr -s' is used in lots of commands here already but I just figured out the -s flag and thought it deserved to be highlighted :)

Suspend, background, and foreground a process

1. Start a process, such as 'top' command 2. # suspend process {ctrl-Z} 3. # background process bg 4. # list all backgrounded jobs jobs 5. # bring it back to foreground fg

Show git branches by date - useful for showing active branches

HTML5 ogg player

find OGG audio files on your *nix box and listen to them using your web browser

find text in a file

this will find text in the directory you specify and give you line where it appears.

List Network Tools in Linux

Get all the networking related commands for your distro

Another Matrix Style Implementation

list files recursively by size

Update twitter with Perl

Requires Net::Twitter. Just replace the double quoted strings with the appropriate info.

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