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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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