Linux Tech Support: commands

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

Basic Linux & Unix commands

Basic Linux & Unix commands 100+ Important LINUX and UNIX Commands adduser ::-- Add a new user arch ::-- Print machine architec...