I am a fan of ubuntu but I am wondering always to try the mother of ubuntu which is debian, but there is something always irritates me when I want to migrate from ubuntu to debian is the guest session, because I always lend my computer to others and I dont want them to play with my personal files and such.

My question is: Can I install guest session to debian? Is there an easy and fast way to hid my personal files when I lend my computer to others?

Just create a new user, called perhaps, guest and let them use that login.
Of course: chmod 700 /home/yourusername
Simple enough?
[Edit]: Beware, that will not hide your files if they can get root access eg with a "live CD". [/Edit]

As mentioned you can easily create another account and have guests log-in to that account. Have your unit boot-up to the log-in screen (don't have it auto log-in to your private account.)

Can I make this user at the /tmp to automatic delete it when I restart the computer? because this user maybe will download files from the net and this will take extra space, or something like that makes the same usage.

No, you can not: Because the "guest" will be deleted when you shut down the computer. When it reboots, the account will not exist.

You have access to your computer as the root user, so, if you wish, you can delete your guest's files at any time.

Yeah thanks guys for helping it works great for me.
but if there is any other helpful adds it would be great

Dont forget to take stuff out of the menus you dont want them to use. The above and what I said is what I did for my Grandson.

Interesting - I've never seen "guest" under Ubuntu. I always build my systemsfrom alpha/beta - this Intrepid system has no guest user (not in /etc/passwd).

I think when making a new user for guests is more better from the guest session on ubuntu because I figured something on ubuntu guest session: When I launch openoffice from there it wont open (is this from my system I am using ubuntu 8.10 64bit)

As no one has given a valid answer of things that can still be done easily.

No there is no guest session included in Debian but nevertheless you can take one from Ubuntu and implement it in your Debian.

source: https://blog.vstans.nl/?hl=en#id=7

HowTo: Setup Debian 11 temp guest login

make a backup of 01_debian.conf found in /usr/share/lightdm/lightdm.conf.d/01_debian.conf but outside that directory as it will be deleted otherwise.

search https://pkgs.org/download/lightdm for the appropriate lightdm.deb that fits your need. For Debian 11 I used lightdm_1.30.0-0ubuntu4~20.04.2_amd64.deb
found in Ubuntu Focal.

install this file with
If required install missing dependencies.

look inside your 01_debian.conf backup file and make sure it has greeter-hide-users=false or it will not show the guest account

mine looks like this:
copy it back to the location /usr/share/lightdm/lighdm.conf.d/

In this directory you will also find file 50-disable-guest.conf change it contents to
in the same directory you will find 50-xserver-command.conf change it contents by commenting it out with #
or simply delete the file.

That should be all configuration needed to restart lightdm.service
Extra's:

The guest user account will be created on every login and deleted on every logout.

To customize the guest account you can create a skeleton in /etc/guest-session/
mkdir /etc/guest-session/skel/

If this directory is not created or found it will use the default directory /etc/skel which you can also use but is not adviced as this is also used for newly created users. you may however copy it's contents to /etc/guest-session/skel/

To disable excisting users from showing on the login you can disable them. Each user has a own file and need to be editted seperatly. ex. for user foobar edit /var/lib/AccountsService/users/foobar and add

It's a pretty bad practice to install random deb packages from random sources on your system, especially if an official package from Debian exists: https://packages.debian.org/bullseye/lightdm

Evo2.

P.S. Not sure necroing a 12 year old thread with a cut-and-paste from someone's (your?) blog is such a good idea.

Along with the previous comment... presuming I think this is a good idea, how do I keep my system updated? Do I have to randomly routinely check for updates for Ubuntu's lightdm ??

Wouldn't the good idea include adding the repository, pining [apt-pin] the repository as -1 and lightdm from source as 100 (? I don't recall the exact specifics without looking). Wouldn't you wan't FrankenDebian to have the illusion of stability by staying up to date?