Name the script isloggedon.sh

The script should take $1$ command line argument, which should be a username.$$ This means you should run the command like this:$./$isloggedon$.$sh username$$and your script will be able to get the username from the command line argument.$$ You should NOT prompt the user to enter username after the script is running.

The script will check to see if the user exists on the system $($grep user $/$etc$/$passwd$).$If the user does not exist it will print a message indicating that the user does not exist.$$ Make sure you only get the line for the full username.$$ For example, if the username is rbe$0000,$ you should not also get the rbe$0000\_$t$1$ account.$($If you need help with this, ask$)$

If the user does exist you will check to see if the user is currently logged on $($the$$who$$command can be used to see who is currently logged on $($ who $|$ grep user$)).$If the user is logged on print a message that the user is logged on$.$

If the user is not logged on$,$ use the$$lastlog$$command to find out the last time the user logged on$.$Print the username and the date and time of the last login$.$If the user never logged on$,$ print that the user never logged on$.$

Put comments in your script to include the script name, author, date created, and purpose.

Test and debug your script. $$Some test cases:

logged on user $-$ your user accountnot logged on user $-$ rbe$1111($if you are running the script on cntserv$)$ sec$\_$team $($if you are running the script on your server$).$ It is possible that I might be logged on while you are testing, but that is pretty unlikely unless you have asked me for helpuser that has never logged on $-$ binuser that does not exist $-$ blah

Once your script is complete create a directory in the $/$home$/$exercises$/$abc$1234/$ directory called module$10$ on cntserv.$($Use your username for abc$1234).$

Copy$$your script into the $/$home$/$exercises$/$abc$1234/$module$10$ directory on cntserv.