List of usefull linux commands

disk-related.sh

# top ten files in /path sorted by size
du -a /path | sort -n -r | head -n 10

# show file system and mount point of /path
df /path
# Filesystem   512-blocks      Used Available Capacity iused               ifree %iused  Mounted on
# /dev/disk1s1  489620264 441523000  34155992    93% 2002781 9223372036852773026    0%   /

# file size in mb
ls -lh /path/to/file

hist-file.sh

# if you accidentally polluted your terminal with bad commands 
# and you want to prevent this session from being written to bash_history use
$ unset HISTFILE

# This will kill your shell right away without the shell being able to do anything 
# such as trap the signal, save history, execute ~/.bash_logout, warn about stopped jobs, or any of that good stuff.
$ kill -9 $$

# incase you desroyed your bashrc revert to default
/bin/cp /etc/skel/.bashrc ~/