Find

Unix find command is powerful tool. Recently, I learn how to use it to fix wrong permission of a whole directory tree (hundres of files). If you will be in similar situation try to use: find -nouser - looking for files (directories) not belongs to user. find -type f -not -perm 644 - looking for files with permision other that 644 find -type d -not -perm 755 - looking for directories with permision other that 755

10 nice shell command

Here you can find 10 nice, but not very other using shell command. Personally, I was using bc and lsof.