Red Hat ENTERPRISE LINUX WS 2.1 - Guia de Instalação descarregar pdf (Página 200)

200 Troubleshooting TopSpin

DONE

INDEX

1. Check who is logged in; type who

→ warn all users who are logged in that you are going to shutdown the system

2. Become superuser: type su -

3. Type reviveccu

→ follow the instructions:

a) You will be asked to switch off the acquisition rack

b) reviveccu will automatically reboot the PC

c) Switch on the acquisition rack after the PC has rebooted

12.5 Various problems in Linux

12.5.1 The entire screen is frozen

If you have lost mouse control on the entire screen, there are several things you can

do. The following steps are increasingly drastic; perform the next higher step only

if the previous one didn’t help.

1. Press the Escape key: Esc

2. Press the three keys:

Ctrl-Alt-F1 simultaneously

• this will open a text console, you may login as root and enter init 3 and

then init 5, if this does not work ...

• ... press the three keys:

Ctrl-Alt-Delete simultaneously

→ this will reboot the system

3. If the system is connected to the network, log in as root via ssh from a different

host and type /sbin/reboot

→ this will reboot the PC

4. Push the power button, this is not dangerous in case the Linux system uses an

ext3 file system

Important: before you reboot or shutdown the system, first check who is logged in

if this is still possible: type who.Warn all users who are logged in that you are

going to shutdown the system.

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Red Hat ENTERPRISE LINUX WS 2.1 - Guia de Instalação Página 200