Which of the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)

`shutdown -R 1 now` is an incorrect syntax; `shutdown -r now` initiates a reboot, but `shutdown -R 1` is not a valid way to enter runlevel 1 for maintenance.

`shutdown -single now` is not a standard or valid command for entering single-user mode in SysV init systems.

The `init` command, followed by a runlevel number, is used in SysV init systems to change the current runlevel; `init 1` specifically switches the system to runlevel 1, which is typically single-user mode, ideal for maintenance.

The `telinit` command is generally a symbolic link to `init` and serves the same purpose of changing the system's runlevel; `telinit 1` will also switch the system to runlevel 1 (single-user mode) for maintenance.

The `runlevel` command displays the current and previous runlevels, but it does not change the system's runlevel.