Linux/strings/sed/lsb_release/find

lsb_release -d
find . -type d -name overlay
find . -maxdepth 1 ! -name .gitignore -print0 | xargs -0 -I {} rm -Rf {}
find . -maxdepth 1 ! -name .svn -print0 | xargs -0 rm -Rf

kill $(ps aux | grep '[s]leep' | awk '{print $2}')

http://www.cyberciti.biz/faq/exclude-certain-files-when-creating-a-tarball-using-tar-command/

$ tar -zcvf /tmp/mybackup.tar.gz -X exclude.txt /home/me

exclude.txt
abc
xyz
*.bak

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http://linuxcommando.blogspot.com/2008/03/using-sed-to-extract-lines-in-text-file.html

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mostrar permisos en octal

http://www.linuxforums.org/forum/newbie/21722-command-shows-me-permissions-file-octal.html
ls -l | awk '{k=0;for(i=0;i<=8;i++)k+=((substr($1,i+2,1)~/[rwx]/)*2^(8-i));if(k)printf("%0o ",k);print}'


http://superuser.com/questions/301017/using-sass-on-my-debian-server

http://www.brunolinux.com/02-The_Terminal/Find_and%20Replace_with_Sed.html