Mini Project on Shell Scripting

In this project, we will be creating a shell script that welcomes the logged in user and will display a certain set of information.

The below table contains the list of displayed information and the necessary Linux command for the same:

Usecase	Command
display any information on screen	echo
get current user	whoami
get date	date
information about how long the system has been running	uptime
information about user logins and system reboots	last
information about the system's memory usage in a human-readable format	free -h
information about disk space usage in a human-readable format	df -h
top CPU processes running	top

Create a file with the extension .sh with the below contents
```
 ubuntu@ip-10-0-0-219:~$ vim shell_script.sh
```

Write the shell script to display the required information

 #!/bin/bash
 echo -e "...................................HELLO..................................................."
 echo -e "Hi $(whoami)!Welcome to my DevOps journey!"
 echo -e "..........................................................................................."
 #show the date and time
 echo -e "Current date and time is: $(date)"
 echo -e "____________________________________________________________________________________________"
 #show uptime and downtime
 echo -e "Uptime of the server is $(uptime) \n Last login details: \n$(last -a | head -3)"
 echo -e "______________________________________________________________________________________________"
 #show disc space and ram utilization
 echo -e "Disc space is $(df -h | xargs | awk '{ print $11 "/" $9 }')"
 echo -e "________________________________________________________________________________________________"
 #show RAM utilization
 echo -e "RAM utilization is $(free | xargs | awk '{print $8 "/" $10}')"
 echo -e "_________________________________________________________________________________________________"
 #show top CPU processes
 echo -e "\nTop CPU processes\n$(top -b -n 1 | tail -n +8 | head -n 10)"

Make the file executable with the chmod command

 ubuntu@ip-10-0-0-219:~$ chmod 777 shell_script.sh

Run the shell script

 ubuntu@ip-10-0-0-219:~$ ./shell_script.sh

The ouput for the above script will be as follows:

Thanks for reading my blog.