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Home : Linux : Commands : Linux Commands

Linux CommandsEdit

The following table is a list of linux commands found on a Redhat 9.0 server.

To see a list of bash shell commands, go to the shell commands page. 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.

CommandEdit
DescriptionEdit
adduser Add a new user [2]
arch Print machine architecture [3] [4]
awk Find and Replace text within file(s) [5]
bc An arbitrary precision calculator language [6]
cal Display a calendar [7] [8]
cat Concatenate files and print on the standard output [9] [10]
chdir Change working directory [11] [12]
chgrp Change the group ownership of files [13] [14]
chkconfig Tool for maintaining the /etc/rc[0-6].d directory hierarchy [15]
chmod Change the access permissions of files and directories [16]
chown Change the user and group ownership of files [17] [18]
chroot Change root directory [19]
cksum Print CRC checksum and byte counts [20]
clear Clear terminal screen [21]
cmp Compare two files [22]
comm Compare two sorted files line by line [23]
cp Copy one or more files to another location [24]
cron Daemon to execute scheduled commands [25]
crontab Schedule a command to run at a later time [26]
csplit Split a file into context-determined pieces [27]
cut Divide a file into several parts [28]
date Display or change the date & time [29]
dc Desk Calculator [30]
dd Data Dump - Convert and copy a file [31]
df Display free disk space [32]
diff Display the differences between two files [33]
diff3 Show differences among three files [34]
dir Briefly list directory contents [35]
dircolors Colour setup for `ls' [36]
dirname Convert a full pathname to just a path [37]
du Estimate file space usage [38]
echo Display message on screen [39]
ed A line-oriented text editor (edlin) [40]
egrep Search file(s) for lines that match an extended expression [41]
eject Eject CD-ROM [42]
env Display, set, or remove environment variables [43]
expand Convert tabs to spaces [44]
expr Evaluate expressions [45]
factor Print prime factors [46]
false Do nothing, unsuccessfully [47]
fdformat Low-level format a floppy disk [48]
fdisk Partition table manipulator for Linux [49]
fgrep Search file(s) for lines that match a fixed string [50]
find Search for files that meet a desired criteria [51]
fmt Reformat paragraph text [52]
fold Wrap text to fit a specified width [53]
format Format disks or tapes [54]
free Display memory usage [55]
fsck Filesystem consistency check and repair [56]
gawk Find and Replace text within file(s) [57]
grep Search file(s) for lines that match a given pattern [58]
groups Print group names a user is in [59]
gzip Compress or decompress named file(s) [60]
head Output the first part of file(s) [61]
hostname Print or set system name [62]
id Print user and group id's [63]
info Help info [64]
install Copy files and set attributes [65]
join Join lines on a common field [66]
kill Stop a process from running [67]
less Display output one screen at a time [68]
ln Make links between files [69]
locate Find files [70] [71]
logname Print current login name [72]
lpc Line printer control program [73]
lpr Off line print [74]
lprm Remove jobs from the print queue [75]
ls List information about file(s) [76] [77]
man Help manual [78]
mkdir Create new folder(s) [79]
mkfifo Make FIFOs (named pipes) [80]
mknod Make block or character special files [81]
more Display output one screen at a time [82]
mount Mount a file system [83]
mv Move or rename files or directories [84]
nice Set the priority of a command or job [85]
nl Number lines and write files [86]
nohup Run a command immune to hangups [87]
passwd Modify a user password [88]
paste Merge lines of files [89]
pathchk Check file name portability [90]
pr Convert text files for printing [91]
printcap Printer capability database [92]
printenv Print environment variables [93]
printf Format and print data [94]
ps Process status [95]
pwd Print Working Directory [96] [97]
quota Display disk usage and limits [98]
quotacheck Scan a file system for disk usage [99]
quotactl Set disk quotas [100]
ram ram disk device [101]
rcp Copy files between two machines [102]
rm Remove files [103]
rmdir Remove folder(s) [104]
rpm Remote Package Manager [105]
rsync Remote file copy (Synchronize file trees) [106]
screen Terminal window manager [107]
sdiff Merge two files interactively [108]
sed Stream Editor [109]
select Accept keyboard input [110]
seq Print numeric sequences [111]
shutdown Shutdown or restart linux [112]
sleep Delay for a specified time [113]
sort Sort text files [114]
split Split a file into fixed-size pieces [115]
su Substitute user identity [116]
sum Print a checksum for a file [117]
symlink Make a new name for a file [118]
sync Synchronize data on disk with memory [119]
tac Concatenate and write files in reverse [120]
tail Output the last part of files [121]
tar Tape Archiver [122]
tee Redirect output to multiple files [123]
test Evaluate a conditional expression [124]
time Measure Program Resource Use [125]
touch Change file timestamps [126]
top List processes running on the system [127]
traceroute Trace Route to Host [128]
tr Translate, squeeze, and/or delete characters [129]
true Do nothing, successfully [130]
tsort Topological sort [131]
tty Print filename of terminal on stdin [132]
umount Unmount a device [133]
uname Print system information [134]
unexpand Convert spaces to tabs [135]
uniq Uniquify files [136]
units Convert units from one scale to another [137]
unshar Unpack shell archive scripts [138]
useradd Create new user account [139]
usermod Modify user account [140]
users List users currently logged in [141]
uuencode Encode a binary file [142]
uudecode Decode a file created by uuencode [143]
vdir Verbosely list directory contents (`ls -l -b') [144]
watch Execute/display a program periodically [145]
wc Print byte, word, and line counts [146]
whereis Report all known instances of a command [147]
which Locate a program file in the user's path [148]
who Print all usernames currently logged in [149]
whoami Print the current user id and name (`id -un') [150]
xargs Execute utility, passing constructed argument list(s) [151]
yes Print a string until interrupted [152]

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