/usr/dt

[George Liu_2]

Is /usr/dt a core file system?

[A. Clay Stephenson · Accepted solution]

Hi George:

Yes, dt --> desktop. You will clobber your CDE environment (or any future CDE environment) if you blow this one away.

Clay

[George Liu_2]

Actually, it is a server running 10.20 and only a console is necessary. We have a boot disk partition /stand failure in this server and I am trying to identify any core-OS directories. Does your answer mean the machine cannot boot up in text mode (console) with out /usr/dt ?
Thanks.

[Bill Hassell]

It's important to think of applications rather than core directories. Blowing away arbitrary directories may save some space but can break various applications and functions.

If you want to remove unnecessary applications and subsystems, use swremove. That way, you can remove the Xwindow manager CDE without impacting related tools, and you'll have a bonus: files and directories in /var, /usr, /opt and /etc that are part of CDE.

[A. Clay Stephenson]

Hi Again:

Actually nothing in /usr is required to boot.
If you know you are never going to need the CDE environment, you can remove the symbolic link in /sbin/rc3.d for starting the dtlogin.
You tty console, telnet, and rlogin sessions will continue to work. I would keep the CDE
stuff because at times it can be handy for running GUI programs. Typically /usr/dt is only about 32 MB nd that's nothing these days.

Clay

[A. Clay Stephenson]

One more point, George.

Eventhough you do not have graphics on this box, it is very common to connect to these boxes using an X terminal or an X emulator like ReflectionX - especially to run something like Glance or STM or even SAM. The CDE environment is not necessary for X but it doesn't hurt.