
Beginner’s Guide | 11
Introduction
This is the Title of the Book, eMatter Edition
Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.
Storage
System Status
Text Processing
Command Action
bzip2 Compress files to free up space.
cpio Create and unpack file archives.
gunzip Expand compressed (.gz and .Z) files.
gzip Compress files to free up space.
tar Copy files to or restore files from an archive medium.
zcat Display contents of compressed files.
zforce Force gzip files to have .gz extension.
Command Action
at Execute commands later.
atq Show jobs queued by at.
atrm Remove job queued by at.
crontab Automate commands.
date Display or set date.
df Show free disk space.
du Show disk usage.
env Show environment variables.
finger Display information about users.
free Show free and used memory.
hostname Display the system’s hostname.
kill Terminate a running command.
printenv Show environment variables.
ps Show processes.
quota Display disk usage and limits.
stat Display file or filesystem status.
stty Set or display terminal settings.
top Display tasks currently running.
tty Display filename of the terminal connected to standard input.
uname Display system information.
uptime Show how long the system has been running.
vmstat Show virtual memory statistics.
who Show who is logged in.
Command Action
col Process control characters.
cut Select columns for display.