This is what came to be when I was reading The Linux Programming Interface.
- my implementation of malloc and free
- psuser - shows PID and command name of all process owned by a particular user
- my implementation of pstree
- psfile - shows all process that have a particular file open
- benchmark - test how long your disk take to create n random 1-byte files in random order and delete them in ascending order
- ugperms - check what permissions a particular user or group has under ACL in a file
- my implementation of ntfw - file tree walk
- dirchangelog - watch for changes in a direcotry and recursive subdirectories and log to a file or stdout (if a subdirectory is added after watch has started, it is watched too)