Lab 3 -Linux Files, Directories and Basic Commands.pptx

Topic : Linux Files, Directories and Basic Commands
(Part- 1)

The cd command is used to change
the current directory.
Syntax:
cd <directory name>
cd .. is used to change the directory
one level up in our path.
Linux Files, Directories and Basic Commands
1. cd

The ls command is used to display a
list of the content of a directory.
Syntax:
ls
2. ls

The cp command is used to copy a file or
directory.
Syntax:
cp <existing file name> <new file name>
3. cp

The rm command is used to remove a
file.
Syntax:
rm <file name>
We can also delete only empty
directories using –d flag, otherwise
we only use rmdir to remove
directories.
4. rm

The mkdir command is used to create
a new directory under any directory.
Syntax:
mkdir <directory name>
We can also create multiple directories
as shown in the figure if we name
multiple directories after the mkdir
command.
5. mkdir

The rmdir command is used to delete
a directory.
Syntax:
rmdir <directory name>
We can also remove multiple
directories as shown in the figure if we
name multiple directories after the
rmdir command.
6. rmdir

The pwd command is used to display
the location of the current working
directory.
Syntax:
pwd
7. pwd

file command is used to determine
the type of a file.
Syntax:
file <option> <filename>
8. file

The cat command prints the contents
of a specified file in the system’s
output.
Syntax:
cat <file name>
9. cat

It works similarly as the cat command but
the more command displays screenful
output at a time in case of larger file (not
the whole content).
Syntax:
more <file name>
In more command, the following keys are used
to scroll the page:
1. ENTER key: To scroll down page by line.
2. Space bar: To move to the next page.
3. b key: To move to the previous page.
4. / key: To search the string.
10. more

It works similarly as the more command
with some extra features such as
adjustment in width and height of the
terminal.
Syntax:
less <file name>
We have to press q to quit out of less.
11. less

The chmod command is used to change the
access mode of a file.
Syntax:
chmod <options> <mode> <filename>
We can use the chmod command in 2
ways:
1. Symbol Mode:
Example: chmod u+rwx demo.txt
2. Operator Mode:
Example: chmod 755 demo.txt as in
figure.
12. chmod

The chown command is used to change a file's
ownership, directory, or symbolic link for a user or
a group.
1. To change the owner:
sudo chown <username> <File name>
Example: sudo chown 1000 demo.txt as in the
figure.
2. To change owner and group:
sudo chown <username/UID> : <Groupname/GID>
<filename>
Example: sudo chown : shishir demo.txt as in figure.
13. chown

Lab 3 -Linux Files, Directories and Basic Commands.pptx

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