Table of Contents

This is part 4 of the series Linux Command Line Interface. Please check earlier articles to get the grasp of current one.

Introduction

The commands mostly used for the manipulation of files and directories are

  • mkdir - Used to create directories.
  • cp - Used to copy files and directories
  • mv - Used to move files and directories
  • rmdir - Used to remove/delete empty directories
  • rm - Used to delete files and directories

Let’s practice these commands each with examples.

Files and Directories Manipulation
Files and Directories Manipulation

Creating Directories

mkdir command is used to create directories. Usage is given in the following table.

commandOperation
mkdir directoryCreates directory in current working directory.
mkdir location/directoryCreated directory in a given location

mkdir example 1

[email protected] ~ $ mkdir dir1
[email protected] ~ $ ls
Desktop  dir1  Documents  Downloads  Music  Pictures  Public  Templates  Videos 

The above command mkdir dir1 creates a directory called dir1 in your home folder and it is verified through ls command. More than one directories can be created at a time using mkdir command.

mkdir example 2

[email protected] ~ $ mkdir dir2 dir3 dir4
[email protected] ~ $ ls
Desktop  dir2  dir4       Downloads  Pictures  Templates
dir1     dir3  Documents  Music      Public    Videos 

mkdir example 3

[email protected] ~ $ mkdir dir1/dir5
[email protected] ~ $ ls dir1
dir5

The above command created dir5 directory in dir1.

Lets try to create a directory dir6 in /usr/bin directory.

[email protected] ~ $ mkdir /usr/bin/dir6
mkdir: cannot create directory ‘/usr/bin/dir6’: Permission denied

Normal user can’t create, change and delete anything in file system directories except in his home directory and its sub directories. Root(or Administrative or Super User) privileges are required to do that. About root comes in later chapter.

Copying Files and Directories

Usage of cp command is given in the following table.

CommandOperation
cp source_file destinationCopy source_file to destination directory. It overwrites file with the same name without prompting.

By default cp command only copies files but not directories. Lets copy hosts file which is presented in directory /etc to home directory.

cp example 1

[email protected] ~ $ cp /etc/hosts .
[email protected] ~ $ ls
Desktop  dir1  dir3  Documents  hosts  Pictures  Templates
dir2  dir4  Downloads  Music  Public    Videos

Single dot (.) represents current working directory. Here current working directory is home directory. Copying from all file system directories is allowed because it doesn’t alter the original file.

cp example 2

[email protected] ~ $ cp hosts dir1
[email protected] ~ $ ls dir1
dir5  hosts

Above command copied hosts file in dir1 directory. Now we have two hosts files each one in home directory and dir1 directory.

Moving Files and Directories

Apart from moving the file from one place to other, mv command is also used to rename file or directory. Usage is given in the following table.

CommandOperation
mv source_file destinationMoves source_file to the destination if destination exists. Otherwise it names the source_file.

mv example 1

[email protected] ~ $ mv hosts ghosts
[email protected] ~ $ ls
Desktop  dir1  dir3  Documents  ghosts  Pictures  Templates
dir2  dir4  Downloads  Music   Public    Videos

There is no directory called ghosts in current working directory. So above command renames the file hosts to ghosts.

mv example 2

[email protected] ~ $ mv dir1/hosts .
[email protected] ~ $ ls
Desktop  dir1  dir3  Documents  ghosts hosts  Pictures  Templates
dir2  dir4  Downloads  Music  Public    Videos

The above command moves hosts file from dir1 directory to current working directory. Be careful that files with the same name will be overwritten.

mv example 3

[email protected] ~ $ mv ghosts dir1/host
[email protected] ~ $ ls dir1
dir5  host

This command renames ghosts file and then moves to dir1 directory.

mv example 4

Until now, operations are performed on files. These same operations can be applied on directories too.

[email protected] ~ $ mv dir3 dir4 dir2
[email protected] ~ $ ls dir2
dir3  dir4

More than one files or directories can be moved to destination directory. In the above command the directories dir3 and dir4 are moved to dir2.

Deleting Files and Directories

rmdir is used to delete empty directories. Where as rm command is used to delete both files and directories.

Example 1

[email protected] ~ $ rm dir1/host
[email protected] ~ $ ls dir1
dir5

The file host is deleted from dir1 directory.

Example 2

Deleting any directory simply with rm command is not possible.

[email protected] ~ $ rm dir1
rm: cannot remove ‘dir1’: Is a directory

Example 3

Using rm with option -r deletes directory and all its contents.

[email protected] ~ $ rm -r dir1
[email protected] ~ $ ls
Desktop  dir2       Downloads  Music     Public     Videos
Documents  hosts      Pictures  Templates
[email protected] ~ $ rm -r dir2 hosts
[email protected] ~ $ ls
Desktop  Documents  Downloads  Music  Pictures  Public  Templates  Videos

hosts file and the directory dir2 are deleted in the above command.