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Archive for January 10th, 2008

Common Linux Commands

  • awk - Pattern scanning and processing language

  • bash - GNU Bourne-Again Shell

  • biff - Be notified when mail arrives (currently not installed)

  • cat - Concatenate files and print on the standard output

  • cd - Change directory

  • chage - Change user password expiry information

  • chgrp - Change group ownership

  • chmod - change file access permissions

  • chown - change file owner and group

  • chroot - run command or interactive shell with special root directory

  • chsh - change login shell

  • clear - clear the terminal screen

  • cp - copy files and directoriesman

  • crontab - maintain crontab files for individual users

  • cut - remove sections from each line of files

  • date - print or set the system date and time

  • dd - convert and copy a file

  • df - report file system disk space usage

  • diff - compare files line by line

  • dig - DNS look up utility

  • dmesg - print or control the kernel ring buffer

  • dnsdomainname - show the system’s DNS domain name

  • echo - display a line of text

  • env - run a program in a modified environment

  • false - do nothing, unsuccessfully

  • fdisk - partition table manipulator for linux (be careful when you use it)

  • find - search for files in a directory hierarchy

  • free - display amount of free and used memory in the system

  • ftp - internet file transfer program

  • fuser - identify processes using files or sockets

  • gcc - GNU project C and C++ compiler

  • grep - grep, egrep, fgrep, rgrep – print lines matching a pattern

  • groupadd – create a new group

  • groupdel - delete a group

  • groupmod - modify a group definition on the system

  • groups - print the groups a user is in

  • gunzip - gzip, gunzip, zcat – compress or expand files

  • host - DNS look up utility

  • hostname - show or set the system’s host name

  • id - print user identity

  • ifconfig - configure a network interface

  • info - read info document

  • finger – locate the binary, source, and manual page files for a command

  • kill - send a signal to a process

  • last - last, lastb – show listing of last logged in users

  • lastlog - lastlog - reports the most recent login of all users or of a given user

  • ln - make links between files

  • ls - list directory contents

  • man - an interface to the on-line reference manuals

  • mesg - control write access to your terminal

  • mkdir - make directories

  • more - paging through text one screenful at a time

  • mount - mount a file system

  • mtr - a network diagnostic tool

  • mv - move (rename) files

  • netcat - TCP/IP swiss army knife

  • netstat – Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships

  • nice - run a program with modified scheduling priority

  • nslookup - query Internet name servers interactively

  • passwd - change user password

  • ping - send ICMP ECHO_REQUEST to network hosts

  • ps - report a snapshot the current processes

  • pwd - print name of current/working directory

  • rm - remove files or directories

  • rmdir - remove empty directories

  • route - show / manipulate the IP routing table

  • sed - stream editor for filtering and transforming text

  • shutdown - bring the system down

  • sleep - delay for a specified amount of time

  • sort - sort lines of text files

  • ssh - OpenSSH SSH client (remote login program)

  • strace - trace system calls and signals

  • strings - print the strings of printable characters in files

  • su - change user ID or become super-user

  • tail - output the last part of files

  • tar - The GNU version of the tar archiving utility

  • telnet - user interface to the TELNET protocol

  • time - run programs and summarize system resource usage

  • true -do nothing, successfully

  • umount - unmount file systems

  • uname - print system information

  • useradd - create a new user or update default new user information

  • userdel - delete a user account and related files

  • uptime - Tell how long the system has been running

  • vi - a programmers text editor

  • vim - Vi IMproved, a programmers text editor

  • w - Show who is logged on and what they are doing

  • wc - print the number of newlines, words, and bytes in files

  • whatis - display manual page description

  • whereis - locate the binary, source, and manual page files for a command

  • which - locate a command

  • who - show who is logged on

  • whoami - print effective user id

  • write - send a message to another user

 

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