Useful Commands

How Much Space Is in Use?

df -h

Example output

The Filesystem with your system root is always /, some systems will have a separate /home filesystem.

Filesystem                                                              Size  Used Avail Use% Mounted on
tmpfs                                                                   3.2G  5.8M  3.2G   1% /run
efivarfs                                                                128K   52K   72K  42% /sys/firmware/efi/efivars
/dev/md3                                                                458G  336G   99G  78% /
tmpfs                                                                    16G  9.0M   16G   1% /dev/shm
tmpfs                                                                   5.0M     0  5.0M   0% /run/lock
/dev/md2                                                                2.0G  321M  1.6G  18% /boot
/dev/nvme0n1p1                                                          511M  344K  511M   1% /boot/efi
tmpfs                                                                   3.2G   16K  3.2G   1% /run/user/0

Disk space usage is also available graphically from the "Storage Devices" section in KDE system settings.

Package Management

Update the system

Arch BasedDebian BasedRed Hat Based

pacman -Syuu

apt update && apt upgarde

dnf update

Update Flatpaks

flatpak update

Update snaps

snap refresh

Install a package

Arch BasedDebian BasedRed Hat Based

pacman -S name

apt install name

dnf install name

Remove a package

Arch BasedDebian BasedRed Hat Based

pacman -R name

apt remove name

dnf remove name