Understanding basic shell commands of
Linux:-
Shell:-
The shell
act's as the most powerful interaction between user and the kernel in system.
The shell is a command line interpreter, it interprets the user typed commands
in console of terminal.
There are
various types of shells are available, which are as follows:
•
Bourne shell
•
C shell
•
Korn shell
•
Bash shell
Let's
discuss some basic shell commands:-
pwd:
The shell command “pwd” prints the
current working directory. That means if you are working in home it will
display “/home”.
Ex:ravi@ravi:~$
pwd
/home/ravi
cd:
The shell
command “cd” allows us to change the directory. We have to move to particular
directory to access the contents in it or by specifying explicit path of a file, so we can access any file.
Ex:
ravi@ravi:~$
cd Downloads
ravi@ravi:~/Downloads$
cat:
The shell
command “cat” displays the contents of file in console.
Ex:
ravi@ravi:~$
cat workshop
Displays
the contents of file workshop
rm:
The shell
command “rm” allows us to remove the file from current directory.
Ex:
ravi@ravi:~$
rm unixfile
After
executing this command the file “unixfile” is removed or deleted.
rmdir:
The shell
command “rmdir” allows us to remove the directory from current directory.
Ex:
ravi@ravi:~$
rmdir directory
After
executing this command the directory named “directory” is removed from current
directory.
touch:
The shell
command “touch” allows us to create file in current directory.
Ex:
ravi@ravi:~$
touch newfile
After
executing this command the file “newfile” is created in current directory.
mkdir:
The shell
command “mkdir” allows us to create directory in current directory.
Ex:
ravi@ravi:~$
mkdir newdir
After
executing this command the directory newdir.
nautilus:
The shell
command “nautilus” allows us to show the
home window.
Ex:
ravi@ravi:~$
nautilus
ps:
The shell
command “ps” allows us to show the current running process started by the user.
Ex:
ravi@ravi:~$
ps
PID
TTY TIME CMD
3795
pts/0 00:00:00 bash
4867
pts/0 00:00:00 ps
top:
The shell
command “top” allows us to show the all the daemon process.
Ex:
ravi@ravi:~$
top
ls:
The shell
command “ls” allows us to show the contents of current directory.
Ex:ravi@ravi:~$
ls
