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Operating System Recovery
30 Secure Services Gateway (SSG) Maintenance Guide
Booting into single-user mode
The advantage of single-user mode is that you do not need a boot diskette or CD-ROM.
However, it does not give you the option to
● mount the file systems as read-only or
● not mount them at all.
If your system boots, but does not allow you to log in when it has completed booting, try
single-user
mode. In single-user mode, your computer boots to runlevel 1. Your local file systems are
mounted, but your network is not activated. You have a usable system maintenance shell.
Unlike rescue mode, single-user mode automatically tries to mount your file system.
!
CAUTION:
CAUTION: Do not use single-user mode if your file system cannot be mounted successfully.
You cannot use single-user mode if the runlevel 1 configuration on your system is
corrupted.
On an x305 IBM Server system using GRUB as the boot loader, use the following steps to boot
into single-user mode:
1. If you have a GRUB password configured, type p and enter the password.
2. Select Red Hat Enterprise Linux with the version of the kernel that you wish to boot and
type a to append the line.
3. Go to the end of the line and type single as a separate word. Press [Enter] to exit edit
mode.
Tip:
Tip: Press the [Spacebar] and then type single.
4. Back at the GRUB screen, type b to boot into single-user mode.
- On an x305 IBM Server system using LILO as the boot loader, at the LILO boot prompt,
type: linux single
Note:
Note: If you are using the graphical LILO, press Ctrl-x to exit the graphical screen and
go to the boot: prompt.
- For all other platforms, specify single as a kernel parameter at the boot prompt.