use the -c option

use the -a option

use the -h option

use the -r option

use the -a option

use the -h option

Specify the directory path as an argument to the du command

use the -d option

specify the file system's mount point as an argument to the df command

use the -a option

use the -t option

use the -T option

ls -la

df -h

free -h

df --readable

Use the ps command and look at the load average column

Use the uptime command

Use the df command

Use the whoami command

-h

--readable

-s

-human

-h

-c

-f

-t

all of the statements

systemctl is-active service_name

service service_name status

systemctl status service_name

all of the statements

systemctl is-enabled service_name

service service_name status

systemctl status service_name

sudo apt-get upgrade

sudo apt-get update

sudo apt-get upgrade --installed

sudo apt-get modify