Disk / Storage

Disk usage

du <option> <path>

Option	Description
-h	Human readable
-s	Summarize: Display only a total for each argument

Sort human readable disk usage

du -hs <path> | sort -h -r

Disk free space

df <option>

Option	Description
-h	Disk free space in human readable format

List block devices

lsblk

List devices UUID (GUID)

lsblk { -f | --fs }

blkid

ls /dev/disk/by-uuid/

ionice

I/O nice / priority

Get I/O priority of process

ionice [-p <PID>]

Set I/O priority of process

Class	Description
0	None
1	Realtime
2	Best-effort
3	Idle

# <level> = 0 to 7, only for best-effort and realtime
ionice 
    { -c | --class } <class>
    [{ -n | --classdata } <level>] 
    { <command> | -p <PID> }