Linux commands A to Z

Linux commands A to Z

A
alias – Create your own name for a command
arch – To print machine architecture
ash – Ash command interpreter (shell)
awk – Pattern scanning and processing language
ac – User connection statistics

B
basename – Remove directory and suffix from a file name
bash – GNU Bourne-Again Shell
bsh – Command interpreter (Shell)
bc – Command line calculator
bunzip2 – Unzip .bz2 files

C
cat – Concatenate a file print it to the screen
chgrp – Change the group designation of a file
chmod – Change file permissions
chown – Change the owner of a file
cjpeg – Compress an image file to a JPEG file
clear – Clear terminal screen (command line)
comm – Compare two sorted files
cp – Copy command
cpio – Copy files to and from archives
cut – Print selected parts of lines to standard output

D
date – Display date and time
dc – Command line calculator
df – Disk space free
diff – Difference between two files
diff3 – Difference between 3 files
dig – Interrogate DNS name servers
djpeg – Decompress a JPEG file to an image file
dmesg – Print or control the kernel ring buffer (print out bootup messages)
doexec – Run an executable with an arbitrary argv
domainname- Show or set the system’s NIS/YP domain name
dos2unix – Converts plain text files in DOS/MAC format to UNIX format
du – Show disk useage
dumpkeys – Write keyboard driver’s translation tables to std output

E
echo – Display a line of text
ed – Line-oriented text editor
egrep – Print lines matching a pattern
elinks – A text mode WWW browser
env – Dislay the path
ex – Start Vim in ex mode
eject – Eject media from device

F
factor – Display prime factors of a number
false – Exit with a status code indicating failure
fdisk – Disk usage
fgrep – Variant of grep
find – Find a file
finger – Displays information about the system users
fixps – Try to fix common PostScript problems that break postprocessing
free – Display free memory

G
grep – Search for a pattern using regular expression
gtar – GNU version of the archiving utility tar.
gunzip – Unzip .gz files
gzip – Compress files

H
halt – Stop the system
hdparm – Get/set harddisk parameters
head – Print the first 10 lines of a file to standard output
hostname – Show or set the system’s host name
history – Display entire command history
HISTSIZE – Change history size
httpd – Apache Hypertext Transfer Protocol Server

I –
identify – It describes the format and characteristics of image files.
id – Print information for username, or the current user
ifconfig – Display network and hardware addresses
igawk – Gawk with include files
ipcalc – Calculate IP information for a host

K
kbd_mode – Report or set the keyboard mode
kill – Terminate a process

L
last – Show list of last logged in users
lastlog – reports the log of all users or of a given user
link – Call the link function to create a link to a file
links – See elinks
ln – Create a link to the specified TARGET with optional LINK_NAME
loadkeys – Load keyboard translation tables
locate – Displays the location of the file
login – Sign in
look – Displays any lines in file which contain “string” as a prefix.
ls – List directory contents
lsmod – List loaded kernel modules
lynx – Command to start the Lynx browser

M
mac2unix – Converts plain text files in DOS/MAC format to UNIX format
mail – A mail processing system, which has a command syntax like ed
man – Display a particular manual entry
manweb – Manweb is part of the Netpbm package
mdu – Display the amount of space occupied by an MSDOS directory
mkdir – Create a directory
mkfs – Make a filesystem on a drive
mknod – Make block or character special files
mktemp – Make temporary filename (unique)
more – Page through text one screenful at a time.
mount – Mount a filesystem/device
mt – Control magnetic tape drive operation
mv – Move and / or rename files

N
namei – Follow a pathname until a terminal point is found
nano – An enhanced free Pico clone
nc – arbitrary TCP and UDP connections and listens
ncftp – Browser program for the File Transfer Protocol
nedit-nc – nedit-nc is the client interface to the NEdit text editor
netstat – Display verbose info about network processes and ports
nice – Run a command with modified priority
nslookup – query internet domain name servers
nisdomainname – Show or set system’s NIS/YP domain name

P
paste – Merge lines of files
pdf2dsc – Generate a PostScript page list of a PDF document
pdf2ps – Convert PDF file “input.pdf” to PostScript(tm) in “output.ps”
pdfinfo – Print contents of the ‘Info’ dictionary (plus some other useful information) from a PDF file
pdftotext – Convert pdf files to plain text
perl – Practical Extraction and Report Language
pgawk – The profiling version of gawk
pico – Text editor that comes with Pine (from the University of Washington)
pine – Email program used by The University of Washington
ping6 – Ping
ping – Send ICMP ECHO_REQUEST to network hosts
pinky – A lightweight ‘finger’ program;
pr – Format for printing
ps – Processes running
ps2ascii – Ghostscript translator from PostScript or PDF to ASCII
ps2epsi – Generate conforming Encapsulated PostScript
ps2frag – Obsolete shell script for the PSfrag system
ps2pdf12 – Convert PostScript to PDF 1.2 (Acrobat 3 and later compatible) using ghostscript
ps2pdf13 – Convert PostScript to PDF 1.3 (Acrobat 4 and later compatible) using ghostscript
ps2pdf14 – Use ps2pdfwr: Convert PostScript to PDF without specifying Compatibility Level, using ghostscript
ps2pdf – Convert PostScript to PDF using ghostscript
ps2pdfwr – Convert PostScript to PDF without specifying Compatibility Level, using ghostscript
ps2pk – Creates a TeX pkfont from a type1 PostScript font
ps2ps – ps2ps uses gs to convert PostScript(tm) file “input.ps” to simpler and (usually) faster PostScript in “output.ps”
psbook – Rearranges pages from a PostScript document into “signatures” for printing books or booklets
pwd – Print Working Directory

Q
quota – Display disk usage and limits

R
resize – Xterm window size
readelf – Displays information about ELF files
reboot – Stop the system, poweroff, reboot
red – red is a restricted ed: it can only edit files in the current directory and cannot execute shell commands
rename – Rename files
rmdir – Remove a directory
rm – Remove files or directories
rpm – rpm command options
rundig – Sample script to create a search database for ht://Dig
rview – The GUI version of Vim in easy mode with restrictions
rvi – Vi / Vim editor

S
sed – Stream editor
setfont – Load EGA/VGA console screen font
sfdisk – Modified fdisk program
sftp – Secure file transfer protocol (ftp)
sh – Shell (BASH)
shred – Safely remove data from disk drive
sleep – Delay for a specified amount of time
slocate – Security Enhanced version of the GNU Locate
sort – Sort lines of a text file
ssh – Secure shell connection command
stty – change and print terminal line settings
su – switch user
switchdesk- Graphical and text mode interface for choosing desktop environment
sync – flush the file system buffers
ssh – Secure shell connection command

T
tail – Print the last 10 Lines of a file standard output
tar – Create an Archive
tcsh – Enhanced completely compatible version of the Berkeley UNIX C shell, csh
tee – Copy standard input to each file, and also to standard output
telnet – User interface to the telnet protocol
time – Run the specified program command with the given arguments
touch – Creating empty files
tracepath6- See tracepath
tracepath – Trace path to a network host discovering MTU along this path
traceroute6-See traceroute
traceroute- Print the route packets take to network host
tree – Display file tree
true – Exit with a status code indicating success
tty – Print the current terminal

U
umask – File creation mask
umount – Detache file system(s) mentioned from file hierarchy
uname – Print system information ( kernel version )
unicode_start- Put keyboard and console into Unicode (UTF-8) mode
unicode_stop – Undo the effect of unicode_start
unlink – Call the unlink function to remove the specified file
uniq – Remove duplicate lines from sorted file
updatedb – Update the slocate database
untar – Unarchive a file
unzip – Unzip .zip files
useradd – Add a new user
users – Output who is currently logged in according to system records
usleep – Sleep a given number of microseconds. default is 1

V
view – Start vim in read-only mode
vi – Start the vi editor
vim – Start the vim editor
vigr – Edit the password or group files
visudo – edit the sudoers file

W
w – who is logged on and what they are doing
wc – Word count of a file
wget – Non-interactive download of files from the Web
whatis – Search the whatis database for complete words (command names)
whereis – Locate a command or file
which – Find command path
whoami – Print effective userid
who – show who is logged on
whois – Client for the whois service

X
xinit – Start Xserver
xpdf – Portable Document Format (PDF) file viewer for X windows
xwd – dump an image of an X window
xrandr – Change resolution running Xwindows ( command line )
Xvfb – Virtual framebuffer X server for X Version 11
Xorg – X11R6 X server

Y
ypdomainname – Show or set the system’s NIS/YP domain name
yum – Yellowdog Updater Modified
ypbind – Nis binding process
ypserv – Nis Server

Z
zcat – Compress or expand files
zip – Compression and file packaging utility
zdump – Time zone dumper
zenmap – Graphical Nmap frontend and results viewer
zipinfo – List detailed information about a ZIP archive

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For More Read This Book

“The Linux Command Line”
A Book By William Shotts

http://linuxcommand.org/tlcl.php

http://linuxcommand.org/

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