Command

Option

Description

at

Queue jobs for later execution

bg

Run job in background

cpio

Copies files to and from archives

crontab

Maintain crontab files for users - cron is a daemon for executing commands at predetermined times

df

Report file system disk space usage

du

Estimate file space usage

fg

Run job in foreground

groupadd groupid

Create a new group

Ifconfig [interface] [options]

Configure a network interface

jobs

show currently running jobs

kill [options] pid

Terminate a process

passwd

Change password

ps [options]

e - all processes
f- full listing
l - long listing

Report process status

route

Show/manipulate the IP routing table

su [options] userid

- or -l make shell a login shell

Substitute user - change the effective userID

tar [options] file

c - create
x -extract
z - uncompress
f - archive name

Tar archiving utility

useradd [options] userid

c - comment
d - home directory
s - shell

Create a new user or update default new user information

who

Show who is logged on

whoami

Print effective User ID

Quick navigation to subsections and regular topics in this section

• User Management Commands
• Disk Space Monitoring Commands
• Process Management
• Scheduling Processes For Later Execution