Ubuntu Command Cheatsheet - jigneshpshah/greycube_helpmanual GitHub Wiki

remove contents of folder

rm -r /path/to/directory/*

change ownership of all files and folders of a directory

go inside the directory

chown -R username:groupname .

To know folder size

du -ch folder-name/ | grep total

Output 15G total

To know the size of the files/ folder

du -h --max-depth=1 /path/to/directory

file size on disk

df -h

top 10 files by size

du -hsx * | sort -rh | head -10

to unmount the disk

sudo umount /dev/sdb OR sudo umount /path/to/directory

find file

find . -name "*filenamekeyword*"