I'm a newbie and I'm using SLES 10 for my server. It's already up and running and I modified my boot.local to be able to run my glassfish application server on startup. my default runlevel is 5 and i want my system to run in console only but still have my Xwindows just in case i need to run a GUI. I have the following concerns:

1. would my changes affect the command that i appended on my boot.local?
2. would there be any significant improvements on the performance of my server?
3. what(files to be modified)and how should i modify my system to be abe to boot up my server until console only.

Sorry if my problem is very elementary for you guys. I'd appreciate all the help i can get. hope to learn more about linux and be good at it.

1) My boot.local has this comment:
Assuming that boot.local is the same for all distros, then the answer is no, changing runlevel on boot should not have adverse effect on the running of your script.

2) Since you are not using GUI, I would think that you have more system resources available, and would probably seem some performance improvement.

3) edit /etc/inittab. change
to this
On re-boot, the system will boot into runlevel 3 (multi-user, text mode). You can still switch to GUI runlevel five by issuing this command: init 5. Then login again when the GUI login screen comes up.

Do you want the gui locally or remotely? Why do you want a gui on a server anyway?

Performance pickup? You should get some - the change will free up memory and some processor time