For those of you who are unsure how to use linux commands, see our Linux Commands Tutorial.
Click on the command name or the to see a description of the command.
Click on the to see the man page for that command.
Click on the to see the man page for that command.
Command | Description | ||
adduser | Add a new user | ||
arch | Print machine architecture | ||
awk | Find and Replace text within file(s) | ||
bc | An arbitrary precision calculator language | ||
cal | Display a calendar | ||
cat | Concatenate files and print on the standard output | ||
chdir | Change working directory | ||
chgrp | Change the group ownership of files | ||
chkconfig | Tool for maintaining the /etc/rc[0-6].d directory hierarchy | ||
chmod | Change the access permissions of files and directories | ||
chown | Change the user and group ownership of files | ||
chroot | Change root directory | ||
cksum | Print CRC checksum and byte counts | ||
clear | Clear terminal screen | ||
cmp | Compare two files | ||
comm | Compare two sorted files line by line | ||
cp | Copy one or more files to another location | ||
cron | Daemon to execute scheduled commands | ||
crontab | Schedule a command to run at a later time | ||
csplit | Split a file into context-determined pieces | ||
cut | Divide a file into several parts | ||
date | Display or change the date & time | ||
dc | Desk Calculator | ||
dd | Data Dump - Convert and copy a file | ||
df | Display free disk space | ||
diff | Display the differences between two files | ||
diff3 | Show differences among three files | ||
dir | Briefly list directory contents | ||
dircolors | Colour setup for `ls' | ||
dirname | Convert a full pathname to just a path | ||
du | Estimate file space usage | ||
echo | Display message on screen | ||
ed | A line-oriented text editor (edlin) | ||
egrep | Search file(s) for lines that match an extended expression | ||
eject | Eject CD-ROM | ||
env | Display, set, or remove environment variables | ||
expand | Convert tabs to spaces | ||
expr | Evaluate expressions | ||
factor | Print prime factors | ||
false | Do nothing, unsuccessfully | ||
fdformat | Low-level format a floppy disk | ||
fdisk | Partition table manipulator for Linux | ||
fgrep | Search file(s) for lines that match a fixed string | ||
find | Search for files that meet a desired criteria | ||
fmt | Reformat paragraph text | ||
fold | Wrap text to fit a specified width | ||
format | Format disks or tapes | ||
free | Display memory usage | ||
fsck | Filesystem consistency check and repair | ||
gawk | Find and Replace text within file(s) | ||
grep | Search file(s) for lines that match a given pattern | ||
groups | Print group names a user is in | ||
gzip | Compress or decompress named file(s) | ||
head | Output the first part of file(s) | ||
hostname | Print or set system name | ||
id | Print user and group id's | ||
info | Help info | ||
install | Copy files and set attributes | ||
join | Join lines on a common field | ||
kill | Stop a process from running | ||
less | Display output one screen at a time | ||
ln | Make links between files | ||
locate | Find files | ||
logname | Print current login name | ||
lpc | Line printer control program | ||
lpr | Off line print | ||
lprm | Remove jobs from the print queue | ||
ls | List information about file(s) | ||
man | Help manual | ||
mkdir | Create new folder(s) | ||
mkfifo | Make FIFOs (named pipes) | ||
mknod | Make block or character special files | ||
more | Display output one screen at a time | ||
mount | Mount a file system | ||
mv | Move or rename files or directories | ||
nice | Set the priority of a command or job | ||
nl | Number lines and write files | ||
nohup | Run a command immune to hangups | ||
passwd | Modify a user password | ||
paste | Merge lines of files | ||
pathchk | Check file name portability | ||
pr | Convert text files for printing | ||
printcap | Printer capability database | ||
printenv | Print environment variables | ||
printf | Format and print data | ||
ps | Process status | ||
pwd | Print Working Directory | ||
quota | Display disk usage and limits | ||
quotacheck | Scan a file system for disk usage | ||
quotactl | Set disk quotas | ||
ram | ram disk device | ||
rcp | Copy files between two machines | ||
rm | Remove files | ||
rmdir | Remove folder(s) | ||
rpm | Remote Package Manager | ||
rsync | Remote file copy (Synchronize file trees) | ||
screen | Terminal window manager | ||
sdiff | Merge two files interactively | ||
sed | Stream Editor | ||
select | Accept keyboard input | ||
seq | Print numeric sequences | ||
shutdown | Shutdown or restart linux | ||
sleep | Delay for a specified time | ||
sort | Sort text files | ||
split | Split a file into fixed-size pieces | ||
su | Substitute user identity | ||
sum | Print a checksum for a file | ||
symlink | Make a new name for a file | ||
sync | Synchronize data on disk with memory | ||
tac | Concatenate and write files in reverse | ||
tail | Output the last part of files | ||
tar | Tape Archiver | ||
tee | Redirect output to multiple files | ||
test | Evaluate a conditional expression | ||
time | Measure Program Resource Use | ||
touch | Change file timestamps | ||
top | List processes running on the system | ||
traceroute | Trace Route to Host | ||
tr | Translate, squeeze, and/or delete characters | ||
true | Do nothing, successfully | ||
tsort | Topological sort | ||
tty | Print filename of terminal on stdin | ||
umount | Unmount a device | ||
uname | Print system information | ||
unexpand | Convert spaces to tabs | ||
uniq | Uniquify files | ||
units | Convert units from one scale to another | ||
unshar | Unpack shell archive scripts | ||
useradd | Create new user account | ||
usermod | Modify user account | ||
users | List users currently logged in | ||
uuencode | Encode a binary file | ||
uudecode | Decode a file created by uuencode | ||
vdir | Verbosely list directory contents (`ls -l -b') | ||
watch | Execute/display a program periodically | ||
wc | Print byte, word, and line counts | ||
whereis | Report all known instances of a command | ||
which | Locate a program file in the user's path | ||
who | Print all usernames currently logged in | ||
whoami | Print the current user id and name (`id -un') | ||
xargs | Execute utility, passing constructed argument list(s) | ||
yes | Print a string until interrupted |
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