Hi all

What is the AUTOEXEC.BT equivalnt for LINUX. ?

Elico

If you have a non-systemd system then it would usually be /etc/rc.local

there is really none
you really DO NOT want that option on a thumb drive or a cd or dvd or flash card

even MS has disabled it

Are you confusing autoexec.bat and autorun?

What is "non-systemd system" ?
Elico

What version and what distro do you have?

systemd does have a rc.local service. In a nutshell rc.local in the olden days ran as the last script before the desktop started. Another way is to use crond via @boot.

However, it depends on what you are trying to accomplish? Are you trying to autostart a GUI application?

Open a terminal and issue:
it will tell if you are on a systemd or init-based system.

If the result says init, then an /etc/rc.local file, if present and and enabled can be considered an "auto executing" batch file, of sorts.
The commands in the file execute after services start but before a GUI Desktop, (or its Login Manager).

So. Before user, after system, rc.local
After user logs in, ~/.config/autostart/ for (few,some,all) recent desktops also has cmd.desktop entries.
Those will load after logging in to the desktop.

Have Fun.