I can not say enough about util-linux/coreutils. If you are a linux user you really should take an hour or so to go through the man pages of any of the programs

I can not say enough about util-linux/coreutils. If you are a linux user you really should take an hour or so to go through the man pages of any of the programs that you are not aware of. The only tool I have never been able to use is ptx. (ptx is permutated indexes: legacy doc index creation[1]) `rev` is an great tool for processing text files from the command line. It is especially useful when you need a quick and easy way to grab the last column of a delimited file when the lines do no have the same number of columns: $ cat somefile | rev | cut -f 1 -d DELIMITER | rev [1]: http://unix.stackexchange.com/questions/92730/usr-bin-ptx-can-you-provide-a-use-case-or-two http://unix.stackexchange.com/questions/92730/usr-bin-ptx-ca...