[Devops] Fave command line tools?

[devops.wsm at c33s.net]

hi all,

thanks for the great tool collection

as far as i have seen nobody has posted this nice little tool before:

tee - is used to split the output of a program so that it can be seen on
the display and also be saved in a file.

made a list out of it, please review
http://www.c33s.net/devops/cmds.php

would need a description for to add them correct:

grep | awk | sort | uniq -c
perl -l, -n, -p, -e (perldoc perlrun)
watch in combination with /proc/$PID/fd, /proc/$PID/fdinfo - instant
progressbar!

greets
julian