linux commands with explanation code example

Example 1: linux commands

Linux Commands (Case Sensitive):

Basic:
pwd                ==> print the name of current directory   || Ex: pwd
whoami             ==> print the current user                || Ex: whoami
cd [directoryName] ==> enter a directory               		 || Ex: cd Music
cd ..              ==> go back to the parent directory       || Ex: cd ..
cp [file]          ==> copy file                             || Ex: cp music.mp3
ls                 ==> list all items in the current folder  || Ex: ls
clear              ==> clears the terminal                   || Ex: clear
mkdir [foldername] ==> makes folder with the specified name  || Ex: mkdir Songs
rmdir [foldername] ==> removes the specified folder          || Ex: rmdir Songs
echo "text"        ==> print the specified text			     || Ex: echo "Hi"

For sorting files:
mv [file] [newname]==> rename a file or folder  			 || Ex: mv exe txt
cat [filename]     ==> reads the specified file              || Ex: cat cmds.txt
tac [filename]     ==> reads the specified file in reverse   || Ex: tac cmds.txt
tail [file, file]  ==> reads first 10 lines of the files     || Ex: tail cmds.txt
zip [file, file]   ==> compresses the specified files        || Ex: zip files
vi [file]          ==> edit file in the terminal             || Ex: vi cmds.txt
gedit [file]       ==> edits the file in text editor         || Ex: gedit cm.txt
nano [file]        ==> edit file in nano editor              || Ex: nano cmds.txt
tar                ==> same as bzip2 						 || Ex: tar file
bzip2 -z / -d      ==> compress and decompress files with    || Ex: bzip2 -z cmds
                       the extension "bz2" respectively  
gzip               ==> same as bzip2 but compresses files    || Ex: gzip file
						with a gz extension.

More advanced: 
man [command]      ==> show the manual of the command        || Ex: ls man
reboot             ==> reboot the system                     || Ex: reboot
[command] --help   ==> similar to man but prints in terminal || Ex: pwd --help
users              ==> prints the current logged in user     || Ex: users
adduser            ==> adds another user                     || Ex: adduser David
deluser            ==> deletes a user                        || Ex: deluser David
ifconfig           ==> prints the details about your network || Ex: ifconfig
su [username]      ==> impersonate as the specified user     || Ex: su root
passwd             ==> change the password of current user   || Ex: passwd
exit               ==> exit the current user or the terminal || Ex: exit

Extras: 
users              ==> shows names of users logged in        || Ex: users
uptime             ==> shows how long the system has been    || Ex: uptime
                       running, number logged on users and 
                       the system load averages
uname -a          ==> show  all the information of the OS    || Ex: uname -a

Example 2: linux commands

Linux Commands (case-sensitive)
reboot ==> reboots system
man ==> gives you instruction of the command - Ex:
"man reboot"
mikdir ==> Creates directory(folder)
cd ==> Change directory
Ls ==> List directory content
pwd ==> Print name of the current working directory. It
gives you the exact location; Ex: /home/Andy/Desktop
ll ==> Long list format
ls-la ==> Prints files and hidden file
clear ==> Clear screen
cd.. ==> Goes to the parent file (not the root file)
cd/ ==> Goes to the parent root file
cd~ ==> Goes to the home of the user file
grep ==> Prints a line matching a pattern
df-h ==> Prints the disk space usage top ==> Displays
linux tasks (like task manager)