Environment
Library management
Module and kernel management
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Runtime level management
exit | Terminates the shell. | |
halt | Stop the system. | |
init | Process control initialization. | |
initscript | Script that executes inittab commands. | |
logout | Log the user off the system. | |
poweroff | Brings the system down. | |
reboot | Reboot the system. | |
runlevel | List the current and previous runlevel. | |
setsid | Run a program in a new session. | |
shutdown | If your system has many users, use the command "shutdown -h +time message", where time is the time in minutes until the system is halted, and message is a short explanation of why the system is shutting down. # shutdown -h +10 'We will install a new disk. System should be back on-line in three hours.' | |
telinit | By requesting run level 1 a system can be taken to single user mode. |
System Configuration tools
ctrlaltdel | Set the function of the ctrl alt del combination. | |
isapnp | Configure ISA plug and play devices. | |
kbdconf | A Redhat Linux tool which configures the /etc/sysconfig/keyboard file which specifies the location of the keyboard map file. This is a GUI based tool. | |
kbdrate | Set the keyboard repeat rate and delay time. | |
kernelcfg | A Redhat GUI kernel configuration tool, Start X, then run it from a console session. | |
linuxconf | Redhat's GUI linux system configuration tool. | |
lspci | List all pci devices. | |
mesg | Control write access to your terminal. | |
mouseconfig | A Redhat Linux tool used to configure the /etc/sysconfig.mouse file. This is a GUI tool. | |
ndc | Script file used to restart, stop, start the DNS server. | |
Printtool | Redhat's GUI printer configuration tool. | |
quota | Display disk usage and limits. | |
quotacheck | Scan a filesystem for disk usages. | |
quotaoff | Turn file system quotas off. | |
quotaon | Turn file system quotas on. | |
samba | Script file used to stop, start, restart samba services when not run using inetd. | |
setpci | Configure pci devices. | |
setserial | Set/get serial port information. | |
setterm | Set terminal attributes. | |
setup | Set up devices and file systems. | |
stty | Used to configure and print the console devices. | |
swapon | Enable devices and files for paging and swapping. | |
swapoff | Disable devices and files for paging and swapping. | |
timeconfig | A Redhat Linux tool used to configure the /etc/sysconfig/clock file. This is a GUI tool used to set timezone and whether or not the clock is set to GMT time. | |
tset | Used to initialize terminals. |
System Information
arch | Print machine architecture. | |
df | Shows disk free space. | |
du | Shows disk usage. | |
free | Display used and free memory on the system. | |
ipcrm | Provide information on ipc facilities. | |
ipcs | Same as ipcrm. | |
lsdev | Display information about installed hardware via files in the /proc directory. | |
lsof | List open files. | |
lspci | List PCI devices . | |
pnpdump | Lists ISA plug and play devices resource information. | |
procinfo | Display system status gathered from proc. | |
pstree | Display a tree of processes. | |
runlevel | Find the current and previous system runlevel. | |
strace | Trace ssytem calls and signals for a binary program. | |
stty | Change and print terminal line settings. | |
tload | Prints a graphic representation of the system load average. | |
tty | Print the filename of the terminal connected to standard input. | |
uname | Print system information, Prints Linux. | |
vmstat | Report virtual memory statistics. | |
xcpustate | Displays CPU states (idle, nice, system, kernel) statistics. Runs in X? |
System Logging
klogd | Kernel log daemon which intercepts and logs Linux kernel messages. | |
logger | Make entries in the system log. | |
syslogd | Linux system logging utilities. | |
sysklogd | Linux system logging utilities. |
System Security
System time
cal | Calendar. | |
clock | Used to change or get current time. The command "clock -–w" sets the hardware clock. | |
date | Print or set the system date and time. | |
hwclock | Set or read the hardware CMOS clock. | |
timed | Time server daemon to synchronize the host's time with other machines, normally invoked at boot time from the rc(8) file. | |
timedc | Timed control program. | |
tzset | Used to change the users private time zone by setting the TZ environment variable. | |
uptime | Reports how long the system has been running. | |
zdump | Prints the current time in each zonename named on the command line. | |
zic | Reads text from files named on the command line and creates time conversion files. |
X Management and programs
SuperProbe | Probe video hardware. | |
Xconfigurator | The Redhat tool used during system setup to configure X. | |
xconsole | Displays messages usually sent to /dev/console. | |
xf86config | Older version of XF86Setup. | |
XF86Setup | A newer X configuration program with a GUI interface which modifies the "/etc/X11/XF86Config" configuration file. | |
xvidtune | This program will test video modes on the fly without modification to your X configuration. Read the usr/X11R6/lib/X11/doc/ |