LinuxLabBasics.ppt

Complete Common File System Tasks
 Navigating the file system
 Managing files and directories

• Navigating the File System
 pwd (Present Working Directory)
 cd
 ls

Using the pwd Command
pwd stands for Print Working Directory or Present
Working Directory
It prints the path of the working directory, starting
from the root.
This is necessary as it let you know where your files
are saved.
Syntax: $ pwd

Using the cd Command
cd command in Linux known as change directory
command. It is used to change current working directory.
Syntax:
$ cd [directory]
Example: $ cd dir1
To move back to parent directory:
$cd ..

Using the ls Command
ls is a Linux shell command that lists directory contents
of files and directories.
Syntax: ls [options]

ls
 –a Displays all files, including hidden files.
 –l Displays a long listing of the directory
contents. This is a very useful option. You can
use it to see the file names, ownership,
permissions, modification date, and size.
 –R Displays directory contents recursively;
that is, it displays the contents of the current
directory as well as the contents of all
subdirectories.

• Managing files and directories
 Creating files and directories
 Viewing file contents
 Deleting files and directories
 Copying and moving files and directories

Creating Directories
 mkdir command in Linux allows the user to create
directories (also referred to as folders in some
operating systems ). This command can create
multiple directories at once
 Syntax: $ mkdir new_directory

Viewing Text File Contents
cat
 It reads data from the file and gives their
content as output. It helps us to create, view,
concatenate files.
 The cat filename command will display the
specified text file on screen.
 Syntax: $ cat filename

Deleting Files and Directories
 rmdir
 rm

rmdir
 This utility can be used to delete an existing
directory. To use it, simply enter
 rmdir directory_name
 For example, rmdir MyFiles.
 Be aware, however, that rmdir requires that
the directory be empty before it will delete it.

rm
 The rm utility is a more powerful deletion utility
that can be used to delete either a file or a
populated directory.
 To delete a file, simply enter rm filename.
 To delete a directory, enter
rm –r directory_name.

rm
 Be careful with rm! By default, it won’t prompt
you to confirm a deletion operation. It assumes
that you really meant to delete the file or
directory.
 If you want rm to prompt you before deleting a
file or directory, include the –i option.

Copying and Moving Files and
Directories
 cp
 mv

cp
 This utility is used to copy files or entire
directory structures from one location in the file
system to another.
 For example, to copy a file named
/tmp/schedule.txt to your home directory, you
could enter
cp /tmp/schedule.txt ~.

mv
 The mv command is used much like cp.
However, it will copy the specified file to the
new location in the file system and then delete
the original.
 For example, to move a file named mylog.txt
from /tmp to /var/log, you would enter
 mv /tmp/mylog.txt /var/log

mv
 The mv command is also used to rename
files. Simply enter mv followed by the file to be
renamed and then the new file name.
 For example, to rename schedule.txt to
schedule.old, you would enter
mv schedule.txt schedule.old.

LinuxLabBasics.ppt

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