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33.2. Single-User Mode
Single-user modeprovides a Linux environment for a single user that allows you to recover your system from problems that cannot be resolved in networked multi-user environment. You do not need an external boot device to be able to boot into
single-user mode, and you can switch into it directly while the system is running. To switch into
single-user modeon the running system, issue the following command from the command line:
single-user mode, the system boots with your local file systems mounted, many important services running, and a usable maintenance shell that allows you to perform many of the usual system commands. Therefore,
single-user modeis mostly useful for resolving problems when the system boots but does not function properly or you cannot log into it.
single-user modeautomatically tries to mount your local file systems. Booting to
single-user modecould result in loss of data if any of your local file systems cannot be successfully mounted.
To boot into
single-user modefollow this procedure:
Procedure 33.2. Booting into Single-User Mode
- At the GRUB boot screen, press any key to enter the GRUB interactive menu.
- Select Red Hat Enterprise Linux with the version of the kernel that you want to boot and press the a to append the line.
singleas a separate word at the end of the line and press Enter to exit GRUB edit mode. Alternatively, you can type
1instead of single.