Monday, August 15, 2016

All Linux Basic/Common commands with there description

  Command      Description          
  • adduser           Add a new user                    
  • arch                  Print machine architecture                
  • awk                 Find and Replace text within file(s)              
  • bc                    An arbitrary precision calculator language                 
  • cal                    Display a calendar                  
  • cat                   Concatenate files and print on the standard output              
  • chdir                Change working directory                 
  • chgrp               Change the group ownership of files             
  • chkconfig        Tool for maintaining the /etc/rc[0-6].d directory hierarchy               
  • chmod             Change the access permissions of files and directories                    
  • chown             Change the user and group ownership of files                      
  • chroot              Change root directory           
  • cksum              Print CRC checksum and byte counts                      
  • clear                 Clear terminal screen             
  • cmp                 Compare two files                 
  • comm              Compare two sorted files line by line           
  • cp                    Copy one or more files to another location               
  • cron                 Daemon to execute scheduled commands                
  • crontab            Schedule a command to run at a later time               
  • csplit                Split a file into context-determined pieces               
  • cut                   Divide a file into several parts                       
  • date                 Display or change the date & time               
  • dc                    Desk Calculator                    
  • dd                    Data Dump - Convert and copy a file                      
  • df                    Display free disk space                     
  • diff                  Display the differences between two files               
  • diff3                Show differences among three files             
  • dir                    Briefly list directory contents           
  • dircolors          Colour setup for `ls'              
  • dirname           Convert a full pathname to just a path                      
  • du                    Estimate file space usage                  
  • echo                 Display message on screen                
  • ed                    A line-oriented text editor (edlin)                 
  • egrep               Search file(s) for lines that match an extended expression               
  • eject                 Eject CD-ROM                     
  • env                  Display, set, or remove environment variables                     
  • expand            Convert tabs to spaces                      
  • expr                 Evaluate expressions             
  • factor               Print prime factors                
  • false                 Do nothing, unsuccessfully               
  • fdformat          Low-level format a floppy disk                    
  • fdisk                Partition table manipulator for Linux           
  • fgrep                Search file(s) for lines that match a fixed string                   
  • find                 Search for files that meet a desired criteria              
  • fmt                  Reformat paragraph text                   
  • fold                 Wrap text to fit a specified width                
  • format             Format disks or tapes            
  • free                  Display memory usage                      
  • fsck                 Filesystem consistency check and repair                  
  • gawk               Find and Replace text within file(s)             
  • grep                 Search file(s) for lines that match a given pattern                
  • groups             Print group names a user is in           
  • gzip                 Compress or decompress named file(s)                    
  • head                Output the first part of file(s)           
  • hostname         Print or set system name                   
  • id                     Print user and group id's                   
  • info                  Help info                   
  • install               Copy files and set attributes              
  • join                  Join lines on a common field            
  • kill                   Stop a process from running             
  • less                  Display output one screen at a time              
  • ln                     Make links between files                  
  • locate               Find files                    
  • logname           Print current login name                    
  • lpc                   Line printer control program             
  • lpr                    Off line print             
  • lprm                 Remove jobs from the print queue                
  • ls                      List information about file(s)             
  • man                 Help manual              
  • mkdir               Create new folder(s)             
  • mkfifo             Make FIFOs (named pipes)              
  • mknod             Make block or character special files            
  • more                Display output one screen at a time              
  • mount              Mount a file system              
  • mv                   Move or rename files or directories               
  • nice                  Set the priority of a command or job            
  • nl                     Number lines and write files             
  • nohup              Run a command immune to hangups            
  • passwd            Modify a user password                   
  • paste                Merge lines of files               
  • pathchk           Check file name portability               
  • pr                     Convert text files for printing           
  • printcap           Printer capability database                
  • printenv           Print environment variables              
  • printf               Format and print data           
  • ps                     Process status            
  • pwd                 Print Working Directory                    
  • quota               Display disk usage and limits           
  • quotacheck      Scan a file system for disk usage                  
  • quotactl           Set disk quotas                       
  • ram                  ram disk device                     
  • rcp                   Copy files between two machines                
  • rm                    Remove files             
  • rmdir               Remove folder(s)                  
  • rpm                  Remote Package Manager                
  • rsync                Remote file copy (Synchronize file trees)                  
  • screen              Terminal window manager               
  • sdiff                Merge two files interactively            
  • sed                   Stream Editor            
  • select               Accept keyboard input                     
  • seq                   Print numeric sequences                    
  • shutdown        Shutdown or restart linux                 
  • sleep                Delay for a specified time                 
  • sort                  Sort text files            
  • split                 Split a file into fixed-size pieces                   
  • su                     Substitute user identity                     
  • sum                  Print a checksum for a file                
  • symlink            Make a new name for a file              
  • sync                 Synchronize data on disk with memory                   
  • tac                   Concatenate and write files in reverse                      
  • tail                   Output the last part of files               
  • tar                    Tape Archiver           
  • tee                   Redirect output to multiple files                   
  • test                  Evaluate a conditional expression                 
  • time                 Measure Program Resource Use                   
  • touch               Change file timestamps                     
  • top                   List processes running on the system            
  • traceroute        Trace Route to Host              
  • tr                      Translate, squeeze, and/or delete characters             
  • true                  Do nothing, successfully                   
  • tsort                 Topological sort                    
  • tty                    Print filename of terminal on stdin               
  • umount            Unmount a device                 
  • uname              Print system information                   
  • unexpand        Convert spaces to tabs                      
  • uniq                 Uniquify files            
  • units                Convert units from one scale to another                   
  • unshar              Unpack shell archive scripts              
  • useradd           Create new user account                   
  • usermod          Modify user account             
  • users                List users currently logged in            
  • uuencode         Encode a binary file               
  • uudecode        Decode a file created by uuencode              
  • vdir                  Verbosely list directory contents (`ls -l -b')               
  • watch              Execute/display a program periodically                    
  • wc                   Print byte, word, and line counts                  
  • whereis            Report all known instances of a command               
  • which              Locate a program file in the user's path                    
  • who                 Print all usernames currently logged in                     
  • whoami           Print the current user id and name (`id -un')             
  • xargs                Execute utility, passing constructed argument list(s)           
  • yes                   Print a string until interrupted  

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