Unix Commands


                       Files &Directories
  • cat          -      Disaply file content
  • cd           -      Changes directory to dirname
  • chgrp      -      Change file group
  • chmod    -      Changing permissions
  • cp           -      Copy source file into destination
  • file          -      Determine file type
  • find         -      Find files
  • grep        -      Search file for regular expressions
  • head       -      Display first few lines of a file
  • ln           -      Create soft link on oldname
  • ls            -      Display information about file type
  • mkdir      -      Create new directory dirname
  • more       -      Display data in the pagenated form
  • mv         -      move(rename) a old name to new name
  • pwd        -      Print current working directory
  • rm          -      Remove(Delete) filename
  • rmdir      -      Delete an existing directory provided it is empty
  • tail          -      Print last few lines in a file
  • touch      -      Update acess and modification time of a file

                Manipulating data
  • awk        -      Pattern scanning and processing language
  • cmp        -      Compare the content of two files
  • comm     -      Comapre sorted data
  • cut         -      Cut out selected fields of each line of a file
  • diff         -      Differential file comparator
  • expand    -      expand tabs to spaces
  • join         -      Join file on some common fields
  • perl         -      Data manipulation language
  • sed         -      Stream text editor
  • sort        -      Sort file data
  • split        -      Split file into smallet files
  • tr           -      Transalate charecters
  • uniq        -      Report repeated lines in a file
  • wc          -      Cound words, lines, and charecters
  • vi           -      Opens vi text editor
  • vim         -      Opens vim text editor
  • fmt         -      Simple text formatter
  • spell        -      Check text for spelling error          -      ispell
  • emacs     -      GNU project Emacs
  • ex,edit    -      Line editor

                      Compressed Files
  • compress -      Compresses files
  • gunzip     -      Uncompress gunzip files
  • gzip        -      GNU alternative compression method
  • uncompress -  Uncompress files
  • unzip      -      List,text & extract compressed files in zip archive
  • zcat        -      Cat a compressed files
  • zcmp      -      Compare compressed files
  • zdiff        -      Compare compressed files
  • zmore     -      File persual filter for crt viewing of compressed text

               Getting Information
  • apropos   -      Locate commands by keywords lookup
  • info         -      Display's commands information pages online
  • man        -      Display manual pages online
  • whatis     -      Search the Whatis database for complete words
  • yelp        -      GNOME help viewer

               Network Communication
  • ftp          -      File Transfer Program
  • rep         -      Remote file copy
  • rlogin      -      Remote login to a UNIX host
  • rsh         -      Remote shell
  • tftp         -      Trivial File Transfer Program
  • telnet      -      Make terminal communication to another host
  • ssh         -      Secure Shell Terminal(or)Command Connection
  • scp         -      Secure Shell remote file copy
  • sftp        -      Secure shell file transfer program

               Messages between Users
  • evoluation -    GUI mail handling tool on LINUX
  • mail        -      Simple send or read mail program
  • mesg      -      Permit or deny messages
  • parcel      -      Send files to another users
  • pine        -      Vdu-based mail utility
  • talk         -      Talk to another user
  • write              -      Write messages to another user

                 Programming Utilities
  • dbx         -      SUN debugger
  • gdb         -      GNU debugger
  • make      -      Maintain program groups and compile programs
  • nm         -      Print programs name list
  • size         -      Print programs sizes
  • strip        -      Remove symbol table relocation bits
  • cb           -      C program defaulter
  • cc           -      ANSI C compiler for SUN SPARC System
  • ctrace     -      C program debugger
  • gcc         -      GNU ANU C Compiler
  • indent     -      Indent and format C program source
  • bc           -      Interactive arithmetic language processor
  • gcl          -      GNU common list
  • perl         -      General purpose language
  • php         -      Webpages embedded language
  • py          -      Python language interpretor
  • asp         -      Webpages embedded language
  • cc           -      C++ Compiler for SUN's SPARC System
  • g++       -      GNU C++ Compiler
  • javac       -      Java Compiler
  • appletViewer – Java Applet Viewer
  • netbeans -      Java integrated development environment on LINUX
  • sqlplus    -      Run the Oracle SQL interpretor
  • sqlldr      -      Run the Oracle SQL data loader
  • mysql      -      Run the MySQL interceptor

                  MISC Commands
  • chfn        -      Change your finger information
  • chgrp      -      Change the group ownership of a file
  • chown     -      Change owner
  • date        -      print the date
  • datermine -    Automatically find terminal type
  • du          -      Print amount of disk usage
  • echo       -      Echo arguments to the standard options
  • exit         -      Quit the system
  • finger      -      Print information about logged-in users
  • groupadd -     Create a user group
  • group      -      Show group membership
  • homequota -   Show quota and file usage
  • iostat      -      Report I/O statistics
  • kill          -      Send a signal to a process
  • last         -      show last logins of Usres
  • logout     -      Log off UNIX
  • lun          -      List user names (or) Login Id
  • netstat    -      show network startup
  • passwd    -      Change user pwd, Change your login pwd
  • printenv  -      Display value of a shell variable
  • ps           -      Display the status of current processes, print                           processes status statistics    
  • quota-v   -      Display disk usage and limits
  • reset       -      Reset terminal mode
  • script      -      Keep script of terminal session, save output of cmd
  • setenv     -      Set environment variable
  • stty        -      Set terminal options
  • time        -      Time a command
  • top         -      Display all system processes
  • tset        -      Set teminal mode
  • tty          -      Print current terminal name
  • umask     -      Show the permission that are given to view files by                   default
  • uname    -      Display name of the current system
  • uptime    -      Get a system up time
  • useradd   -      Create a user account
  • users      -      Print names of logged in users
  • vmstat    -      Report Virtual Memory Statistics
  • w           -      Show what logged in users are doing
  • who        -      List logged in users

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