SOME MUST COMMANDS

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
| You have to create a new user here.        |
| $ sudo adduser username                    | <- creating new user (yes (no))
| $ sudo chage -l username                   | <- Verify password expire info for new user
| $ sudo adduser username sudo               |
| $ sudo adduser username user42             | <- assign new user to sudo and user42 groups
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

Q: How your script works?
A: ... README.md

                                           ##################################
                                           #    Part two: What to check?    #
                                           ##################################
|***************************************|
| 1) lsblk                              1 <- Check partitions
| 2) sudo aa-status                     2 <- AppArmor status
| 3) getent group sudo                  3 <- sudo group users
| 4) getent group user42                4 <- user42 group users
| 5) sudo service ssh status            5 <- ssh status, yep
| 6) sudo ufw status                    6 <- ufw status
| 7) ssh username@ipadress -p 4242      7 <- connect to VM from your host (physical) machine via SSH
| 8) nano /etc/sudoers.d/<filename>     8 <- yes, sudo config file. You can $ ls /etc/sudoers.d first
| 9) nano /etc/login.defs               9 <- password expire policy
| 10) nano /etc/pam.d/common-password  10 <- password policy
| 11) sudo crontab -l                  11 <- cron schedule
|***************************************|


I think this one need an addition to make it more easy to pass evaluation. So, here we are on our checklist and his commands.

How to change hostname?
[$sudo nano /etc/hostname]

Where is sudo logs in /var/log/sudo?
[$cd /var/log/sudo/00/00 && ls]
You will see a lot of directories with names like 01 2B 9S 4D etc. They contain the logs we need.
[$ sudo apt update]
[$ ls]
Now you see that we have a new directory here.
[$ cd <nameofnewdirectory> && ls]
[$ cat log] <- Input log
[$ cat ttyout] <- Output log

How to add and remove port 8080 in UFW?
[$ sudo ufw allow 8080] <- allow
[$ sudo ufw status] <- check
[$ sudo ufw deny 8080] <- deny (yes yes)

How to run script every 30 seconds?
[$ sudo crontab -e]
Remove or commit previous cron "schedule" and add next lines in crontab file
|*************************************************|
| */1 * * * * /path/to/monitoring.sh              |
| */1 * * * * sleep 30s && /path/to/monitoring.sh |
|*************************************************|
To stop script running on boot you just need to remove or commit
|********************************|
| @reboot /path/to/monitoring.sh |
|********************************|