Greetings all,

I'm a complete newbie, but enjoying the Linux learning curve very much. Just installed CentOS 7 and going through "The Linux Command Line: A Complete Introduction" by William E. Shotts Jr. Nicely laid out for a neophyte to get up and running.

I'm having a pesky problem though... powersave seems to kick in after a certain time of inactivity and when I tab back into the screen it is utterly blank -- forcing me to hard reboot. A google search yielded these two commands:

setterm -powersave off -blank 0

/usr/bin/setterm -powersave off -blank 0

Do these work only for the current session? If so, is there a permanent solution (perhaps preferably done in the bios?)

Any help or guidance is much appreciated.

Best,
Kelley

Hi:

Welcome to Linux Questions and.....
congrads on your fresh installation of CentOS 7!

Look in your System Settings Menu. In your upper right hand corner of your desktop environment (with the Gnome DE) where you see your name.
You should be able to disable powersave, hybernate, blank screen and other things as well.

https://www.centos.org/forums/viewtopic.php?t=20493

1 members found this post helpful.

Hi Ztcoracat,

Thanks so much for the reply. I’ll disable this in the Systems Settings of the Gnome shell. But as I mentioned, complete newbie here. Haven’t even got to the Gnome shell yet. Just going though commands via the classic terminal.

I did a search to bring up the Gnome shell, and found this:

[root@localhost ~]# echo "exec gnome-session" >> ~/.xinitrc
[root@localhost ~]# startx

However, I can’t seem to find a clear answer as to exiting the Gnome shell and returning to the classic terminal mode. I always like to give myself bread crumbs when I venture down a new path. Is there a clean way to exit the gui and default back to the classic terminal on re-boot?

Thanks again,
Kelley

The daemon is probably called gnome-power-manager

#systemctl disable gnome-power-manager

#systemctl stop gnome-power-manager

is there a reason you didn't install a desktop?

1 members found this post helpful.

Hi Chris,

After the install, CentOS defaulted to a terminal shell on boot. Not sure if I did or did not install a desktop. Still finding my way here. I'm probably asking ignorant questions, but starting to get a feel nonetheless. Thanks for the reply, regardless. I'll try your suggestion after I confirm I don't have the gui.

Best,
Kelley

You don't and my suggestion is bad because I had my head up my fourth point of contact..

Google systemd power management and you'll have your answer. The CENTOS media can intstall desktops it's in the SW selection part you have to select workstation server etc. just select workstation then open that'll give you a menu further to the right to select other SW. The other issue is your book was likely written pre-systemd so some of the stuff in there won't work like startx. If this system needs to work reinstall installing a desktop and learn from there the redhat knowledge base will be helpful.

1 members found this post helpful.

Thanks Chris. That makes sense. I'm going to get through the book (probably by this weekend) and then do a re-install with the desktop.

Best,
Kelley

Download CentOS here:
http://www.centos.org/download/

Burn the .iso at a slow speed.-

-::-You can try this before you do a fresh download.-::-

Run those commands w/o the pound (#) sign and run as 'root'. The terminal will say "complete!" when done.

To become root in cmd-line in a CentOS terminal run:
That should give you a desktop environment.-

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Have a Happy Fourth of July!

http://unix.stackexchange.com/questi...ts-on-centos-7

1 members found this post helpful.

You know, given the history of GNU and Linux, I had a suspicion the developers involved would be intelligent and gracious. I wasn’t wrong. Thanks so much for the clear direction Ztcoracat. This will obviously save me much time and frustration on the re-install.

Looking forward to my path towards superuserhood.

Best,
Kelley

1 members found this post helpful.

Looks like CentOS 7 ships with sudo - might be a safer option.
I did a test install a while back and note I am in the wheel group, so can do all commands using sudo. I'm guessing I chose to add my user to the admin group during the install.

Google found doco on sudo on the wiki and CentOS.org - as well as all over the web.

1 members found this post helpful.

Thanks syg00. About halfway though my first book. Should finish by tomorrow. Re-install on Monday, and I'll do it with sudo.

Best,
Kelley

Your Welcome, Kelley-

I run my CentOS with "su" as root.
For some reason sudo does not work in my CentOS terminal.

1 members found this post helpful.