Bash Shell Scripting- Shell Script to send Automatic Mail Alert when RAM Memory gets Low

The video tutorial explains how to create a shell script to monitor RAM usage and send automatic email alerts when RAM is low. It covers using the 'free' command to check RAM size, setting a threshold, and employing grep and AWK commands to extract necessary data. The tutorial also demonstrates writing a shell script with a shebang line, setting a threshold, and using an if condition to trigger alerts. Finally, it shows how to automate the script using crontab for regular monitoring and discusses potential applications beyond RAM monitoring.

What command is used to check the RAM size on a host?

• ps

• top

• free

• df

What is the purpose of setting a threshold limit in the RAM monitoring script?

• To determine when RAM is low

• To optimize disk space

• To increase RAM size

• To decrease CPU usage

Which command is used to extract specific fields from the output in the script?

• sed

• grep

• tail

• awk

What is the purpose of the 'shebang' line in a shell script?

• To define script variables

• To set environment variables

• To specify the script interpreter

• To comment the script

How can you ensure that an email alert is sent automatically when RAM is low?

• By using a text editor

• By manually running the script

• By configuring the mail command

• By redirecting output to a file

What is the role of crontab in the context of this script?

• To debug the script

• To compile the script

• To schedule the script to run automatically

• To edit the script

How often does the script run when scheduled with '* * * * *' in crontab?

• Every day

• Every week

• Every hour

• Every minute