Bash

Search largest file

du -hs <dir>/* | sort -h

Of met exclude:

du -hs /* --exclude=/media/sdcard --exclude=/var  --exclude=/home/rijk --exclude=/home/miel | sort -h

Search largest file recursively

find . -type f -exec ls -alh {} \; | sort -hr -k5 | head -n 25

Last changed files

ls -altR . | head -n 3

Recently installed packages

cat /var/log/dpkg.log | grep "\ install\ "
awk '$3~/^install$/ {print $4;}' /var/log/dpkg.log

Change file date

touch -m -a -t 201609021156 00002.m4v

Ls with year

ls -lahot --full-time