Question

***Need 200 words in total for the 3 question about LINUX below***

1. What is the syntax used to identify operating systems in the GRUB menu?
2. What do the systemctl set-default graphical.target commands do?
3. How does the multi-user.target file differ from the graphical.target file?

Answer 1

1. Sudo os-prober

os-prober is a command that is used to list all other operating systems. It is used during installation and reconfiguration to create a GRUB boot menu that shows other installed OSes as well as Ubuntu.

2. To configure the system to use a different target unit by default, the following command at a shell prompt is used:

systemctl set-default graphical.target .

This command replaces the /etc/systemd/system/default.target file with a symbolic link to /usr/lib/systemd/system/graphical.target,

It is used to make the system graphical ie. it is used to set up a graphical user shell.

3. Multi-user sets up a non-graphical System, whereas Graphical sets up a graphical system

multi-user.target means that the systemd-service will start when the system reaches run level 2 and it sets up a non-graphical multi-user system

graphical.target means that the systemd-service will start when the system reaches run level 5 and it sets up a graphical multi-user system.