An administrator is having some trouble with a disk partition and needs to do maintenance on this partition. The administrator's users home directories are on it and several are logged in. Which of th

The telinit 1 command instructs init to switch to runlevel 1 (single-user mode), which terminates all multi-user services and active user sessions. This clears access to the home directory partition and provides a root-only shell for safe administrative maintenance without rebooting.

shutdown -r now performs a full system reboot, which is unnecessarily disruptive and does not allow the administrator to perform maintenance tasks before restart.

killall -9 inetd terminates only the inetd super-daemon and has no effect on users who are already logged in via established sessions.

/bin/netstop --maint is not a valid or standard Linux command.

Stopping the network init script disconnects network interfaces but does not terminate local terminal sessions or release the home directory partition.