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Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 5: The Linux Operating System

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Command Line Functions And Administrative Utilities

The administrative commands and concepts for using the command line interface to manage a Linux system are discussed in this section. Many additional commands and functions exist that are not listed here but this list will help the new Linux system administrator to accomplish the most important and frequently used functions. For workstations and systems that have a GUI running the a later section will cover similar functions, using a GUI based administrative tool.

Table 18 contains a summary of some of the more important administrative commenads.


Table 18: Basic Linux Administrative Commands

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



Previous Topic/Section
Environment Variables
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User Management Commands
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