Part $1$ Vi $(10$ Marks$)$

$1.$ What are the $3$ modes of vi$?$ Explain the role of the modes.

$2.$ How can you exit vi and save the file at the same time?

$3.$ How can you save a file without exiting vi$?$

$4.$ How can you turn on line numbering in vi$?$

$5.$ How is $$copy and paste$$ and $$cut and paste$$ performed in vi$?$

Part $2$ Shell scripting $(20$ marks$)$

$1.$ File Management Script: Write a shell script called file$\_$management.sh

that performs the following tasks:

$$ Creates a new directory named my$\_$files in the current directory.

$$ Copies all files with a $.$txt extension from the current directory to the

my$\_$files directory.

$$ Displays a message indicating the total number of files copied.

$2.$ System Information Script: Write a shell script called system$\_$info.sh that

gathers and displays the following system information:

$$ Hostname

$$ Kernel version

$$ CPU information $($number of cores, processor type$)$

$$ Total memory available

$$ Disk usage information $($total disk space, used space, available space$)$

$3.$ Backup Script: Write a shell script called backup.sh that creates a backup

of a specified directory. The script should take the following parameters:

$$ Source directory: the directory to be backed up$.$

$$ Destination directory: the directory where the backup will be stored.

The script should create a timestamped directory inside the destination

directory and copy all files and subdirectories from the source directory

into it$.$

$$ Using, gzip, bzip$2,$ or zip, compress the contents of the destination

directory, to a file.

$4.$ Password Generator Script: Write a shell script called

password$\_$generator.sh that generates a random password of a specified

length. The script should take the desired length of the password as a

command$-$line argument