= How do I reboot a server via the console? = If a server fails and you are not able to [wiki:secure_shell secure shell] to investigate and fix the problem, the first step is to attempt to access the server via it's dom0 (if the server is a domU). Check our [wiki:server_overview server overview page] to see if the server in question is a domU and if so which dom0 it belongs to. If the server in question is a stand alone server or a dom0 then it should be accessible via the [wiki:telehouse_serial_access serial console]. The console should provide information about the crash. You can reboot the server by using the [http://www.brunolinux.com/01-First_Things_To_Know/Skinny_Elephants.html raising skinny elephants] trick. Since the console is provided via [deb:cereal], you need to use special break characters. The exact sequence is: {{{ ctrl-\ b r ctrl-\ b s ctrl-\ b e ctrl-\ b i ctrl-\ b u ctrl-\ b b }}} After each line you should get confirmation on screen that it was run, for example: {{{ SysRq : Keyboard mode set to XLATE SysRq : Emergency Sync Emergency Sync complete SysRq : Terminate All Tasks SysRq : Kill All Tasks SysRq : Emergency Remount R/O }}}