Use this script to control the LEDs on your Pogoplug with Arch Linux ARM. More under the cut

pushpath () { export PATH=${PATH}:${1}; }

#bash

Never thought about it untill I saw @pspeter3 post about it. More under the cut

function add-alias() {
    echo "alias $1=\"${@:2:$#}\"" >> ~/.bashrc;
    source ~/.bashrc;
}

#bash

find . -name ".svn" -exec rm -rf {} \;

#svn #bash via:http://www.commandlinefu.com/commands/view/902/delete-all-.svn-directories-from-current-path-recursive

for f in *.mp4
  ffmpeg -i "$f" -ab 32k -ac 1 -acodec mp3 -vn "${f%.*}.mp3"
done

#shell #bash #encode #audio #video

Here is the task.

I've got two directories: A and B (two versions of a same library).

I need to list all the files in A where git diff between file from A and from B is longer than 2 lines.

What is the cleanest way of doing this in #bash?

How to compare the size of a two (and more) directories in the console:

diff <(du -sh gems/activesupport-3.2.11) <(du -sh gems/activesupport-2.3.2)
1c1
< 1,8M  gems/activesupport-3.2.11
---
> 2,7M  gems/activesupport-2.3.2

Cheers to the authors for a such a size shrink, btw!

#bash #unix #howto

You need:

gem install rubyc
gem install colored

Then type in the log dir of your Rails app. tail -f development.log | rubyc map --require=colored 'line.match(%r{^Started}) ? line.green : line' #bash #rails #log #color

grep --color -E "pattern|$" file

via this #bash

#Bash? #Metaprogramming? WTF? Turns out, bash's everything-is-a-string philosophy makes it pretty awesome for metaprogramming. More under the cut

Today I was playing with man program and I discovered how man's colored text is transmitted to the less program.

Note: man doesn't use escape sequences to communicates its colors. More under the cut

If you want to remove color escaped sequences from a stream. Useful to remove colors from rails log files.

cat colored_file.log | perl -ne 's/\x1b[[()=][;?0-9]*[0-9A-Za-z]?//g;s/\r//g;s/\007//g;print'`

#bash, #rails

To sniff the data sent and received from a host. Run the following command.

mkfifo pipe
tty=`tty`; nc -l -p 1234 < pipe | tee $tty | nc $host $port | tee pipe

Configure your program to communicate with localhost:1234 and run it.

All the data exchanged will be outputted to the terminal.

Note that on OS X, the nc -l option does not require the -p.

#bash

Mine are:

g for git s for sublime p for navigating to project, thanks to @kirs, source cpd for cap production deploy csd for deploying staging More under the cut

I don't want to write tons of text, just look at my new aliases:

alias .='mvim .'
alias ,='git'

Usually I use one–letter aliases like b for bundle or g for rails generate. I really dislike stuff like gst for git status or rdbm for rails db:migrate: too much letters and no sense (as for me). So, I like my new aliases, they are short enough.

#shell #bash #ruby #osx #unix #linux #zsh #alias #awesome #incredible

alias l='ls -trlah'

more productive ls:

• -tr to sort modified asc, last modified will be in the end of output
• -l for permissions
• -a for hidden 'dot' files
• -h for human readable size

#unix #bash

Here is the code: More under the cut