Linux Basic Commands

$df -h -> same as my computer in windows

$fdsik -l -> list partition
$man <cmd> -> manual
$clear -> clear the screen
$^l -> clear the screen
$ls -> list content
$ls -l -> list content in long listing format
$ls -al -> list all subcontent in long listing format
$ll -> an alias for the above
$ls -R -> list content recursively
$l. -> list hidden files
$ls -F -> list content and classify them
$alias -> display all aliases for current user
$alias <statement> -> make alias eg alias c='clear'
$unalias <alias> -> remove alias eg unalias c
$exit -> log out from the system
$logout -> log out from the system
$^d -> log out from the system
$tree -> list content in a tree (hierarchial) diagram
$tree -d -> list subdirectories only - no files
$tree -p -> list content with their permissions
$cd <directory> -> change directory to...
$cd .. -> change to parent directory
$cd - -> change to previous directory
$cd -> change to home directory
$cd ~ -> change to home directory
$pushd -> change dir with pwd
$cat -> display a content of a file
$pwd -> print work (current) directory
$pwd -P -> print parent working dir of this symlink dir
$mkdir <directory> -> make directory
$mkdir -p <directory> -> make parent directories also if it does not exist
$touch -> make a 0 byte file if it does not exist
$cp -> copy (for files)
$cp -a -> copy (for directories)
$cp -p -> copy and preserve date and time
$mv -> move OR rename
$rmdir -> remove empty directory
$rm -> remove (for files)
$rm -f -> remove forcefully ( " " )
$rm -r -> remove recursively (for directories)
$rm -rf -> remove recursively and forcefully ( " " )
$cat -> display content of the file
$cat -n -> display content of the file and number the lines
$cal -> display calendar for current month
$date -> display system date and time
$date -s '<value>' -> change system date and time in mm/dd/yy
$hwclock -> display the hardware clock
$hwclock –hctosys -> set the system time from the hardware clock
$ln -s -> make a soft/sym/symbolic link
$ln -> make a hard link
$history -> display the list of the last 1000 commands
$! 100 -> Run command 100 in history
$vi -> text editor
$vimtutor -> vi manual withexercise
$pico -> pico manual withexercise
$mcedit -> mcedit manual withexercise
$aspell -c <filename> -> check the spelling in the file
$elinks -> check the web links
$file -> display the type of file
$which -> display the path of the binary
$whereis -> display all paths
$hostname -> display system name with domain
$id -> display id info of current user
$id -u -> display user id of current user
$id -un -> display username of current user
$id -g -> display group id of current user
$id -gn -> display groupname of current user
$uptime -> display for how long the system has been running
$tty -> display current terminal number
$users -> display no. of users currently logged in
$whoami -> display username of current user
$who -> display users logged in the system with their respective terminals and time since logged in
$who am I -> display current user, terminal and uptime
$w -> display is details which files are open on which terminal
$mkdir -p /opt/funny/test
$cd /opt/funny/test -> absolute path
$cd /opt/funny
$pwd /opt/funny
$cd test –> relative path