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

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 get a description of your system directory layout:

man hier

#unix, #linux, #OSX

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