Linux Command Cheat Sheet Basic commands Share This Cheat Sheet File management File Utilities | Pipe (redirect) output find search for a file tr -d translate or delete character sudo [command] run < command> in superuser mode ls -a -C -h list content of directory uniq -c -u report or omit repeated lines rm -r -f remove files and directory split -l split file into pieces locate -i find file, using updatedb(8) database wc -w print newline, word, and byte counts for each file cp -a -R -i copy files or directory head -n output the first part of files du -s disk usage cut -s remove section from file file -b -i identify the file type diff -q file compare, line by line mv -f -i move files or directory join -i grep, egrep, fgrep -i -v print lines matching pattern nohup [command] run < command> immune to hangup signal man [command] display help pages of < command> [command] & run < command> and send task to background >> [fileA] append to fileA, preserving existing contents > [fileA] output to fileA, overwriting contents echo -n display a line of text xargs build command line from previous output File compression tar xvfz create or extract .tar or .tgz files 1>2& Redirect stdout to stderr fg %N go to task N gzip, gunzip, zcat create, extract or view .gz files jobs list task uuencode, uudecode create or extract .Z files ctrl-z suspend current task zip, unzip -v create or extract .ZIP files rpm create or extract .rpm files bzip2, bunzip2 create or extract .bz2 files File permission chmod -c -R chmod file read, write and executable permission touch -a -t modify (or create) file timestamp chown -c -R change file ownership chgrp -c -R change file group permission touch -a -t modify (or create) file timestamp Network netstat -r -v print network information, routing and connections telnet user interface to the TELNET protocol tcpdump dump network traffic ssh -i openSSH client ping -c print routing packet trace to host network Compiled by Alvin Khoo rar create or extract .rar files File Editor ex basic editor vi visual editor nano pico clone view view file only emacs extensible, customizable editor Memory & Processes free -m display free and used system memory killall stop all process by name sensors CPU temperature top display current processes, real time monitoring kill -1 -9 send signal to process service [start|stop|restart] manage or run sysV init script join lines of two files on a common field ps aux display current processes, snapshot more, less view file content, one page at a time dmesg -k display system messages sort -n sort lines in text file comm -3 compare two sorted files, line by line cat -s concatenate files to the standard output tail -f output last part of the file Scripting Disk Utilities df -h, -i File system usage mkfs -t -V create file system resize2fs update a filesystem, after lvextend* fsck -A -N file system check & repair pvcreate create physical volume awk, gawk pattern scanning mount -a -t mount a filesystem tsh tiny shell fdisk -l edit disk partition "" anything within double quotes is unchanged except \ and $ lvcreate create a logical volume umount -f -v umount a filesystem '' anything within single quote is unchanged python "object-oriented programming language" bash GNU bourne-again SHell ksh korn shell php general-purpose scripting language Misc Commands pwd -P print current working directory bc high precision calculator expr evaluate expression sublime yet another text editor sed stream editor csh, tcsh C shell cal print calender pico simple editor perl Practical Extraction and Report Language export assign or remove environment variable source [file] load any functions file into the current shell, requires the file to be executable ` [command] backquote, execute command date -d print formatted date $[variable] if set, access the variable Directory Utilities mkdir create a directory rmdir remove a directory Read the Blog Post » bit.ly/Linux-Commands