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Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

check for write/read permissions
su www-apache/ftp user and then check readable: find ~/ -type d \( -wholename '/dev/*' -o -wholename '/sys/*' -o -wholename '/proc/*' \) -prune -o -exec test -r {} \; -exec echo {} readable \; 2>/dev/null check writable: find ~/ -type d \( -wholename '/dev/*' -o -wholename '/sys/*' -o -wholename '/proc/*' \) -prune -o -exec test -w {} \; -exec echo {} writable \; 2>/dev/null

One liner to kill a process when knowing only the port where the process is running
-k (kill option ) . To kill all processes accessing this port

Grep by paragraph instead of by line.
This is a command that I find myself using all the time. It works like regular grep, but returns the paragraph containing the search pattern instead of just the line. It operates on files or standard input. $ grepp or $ | grepp

List all packages by installed size (Bytes) on rpm distros

Print IP of any interface. Useful for scripts.

Create an SSH tunnel for accessing your remote MySQL database with a local port

Concating pdf files

list block devices
Shows all block devices in a tree with descruptions of what they are.

See system users


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