Daily tip

How can avoid that a process is killed when the controlling (shell) terminal exits?

$ man nohup

Daily tip

Is there any other pager similar to more or less?

Yes, please look for most

Daily tip

Does Slackware support PAM?

PAM is not present in the standard Slackware build as is not inline with its creators philosophy.
If you want you can try to enable PAM support for a specific application you need.
There`s also the project Dlackware to add gnome3 + pam + systemd on top of Slackware SlackBuilds (see https://github.com/Dlackware ).