> >> I noticed a strange behaviour (don't know if this is the wanted >> default). If I try ,from normal user shell, to run command like "reboot" >> or "shutdown -h now" system will reboot/shutdown. This happens on tty >> console, on xfce terminal and ssh session. > > I've just created a normal user on my test system and when I try to > reboot or halt the system when logged in via ssh I get: > > $ reboot > Failed to set wall message, ignoring: Interactive authentication > required. > Failed to reboot system via logind: Interactive authentication > required. > Failed to open initctl fifo: Permission denied > Failed to talk to init daemon. > > Which is correct behaviour. > > However, a user logged in at the machine as GUI console session has > always been able to halt or reboot the system. > >> >> Why on CentOS a normal user can shutdown the system without root >> privileges? I think that on any server normal user should not be able to >> shutdown the system without privileges. >> > If it's a desktop machine, then the console logged in user should be > able to shutdown the machine - at least then it means they don't resort > to pulling the plug. Presumably you don't allow users physically near > a server? That's why I asked if the user who was logged in via ssh was also logged in locally at the same time. That would at lest explain such behavior. Regards, Simon