Last Updated: 14 Oct 2023
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Getting into Single User Mode in CentOS 5
Unlike FreeBSD, which lets you boot into single user mode from a startup menu, getting into Single User Mode in CentOS is a little more complicated. Here's how:
- Reboot the system:
bash# reboot
- When the system reboots, it will say 'Press any key to enter the boot menu….'. Press a key, and you'll get to GNU GRUB.
- Choose the kernel you want (probably the one that's listed on top), and press
e
- Scroll down to the partition that has your kernel on it (it should start with
kernel
) and presse
again. - It will now display something like:
<0/LogVol00
Enter
<space> single
after that, so you've got:<0/LogVol00 single
That tells CentOS to boot at run-level 1 in single user mode. You can also type
emergency
instead ofsingle
, which does the same thing but doesn't start any of your init scripts. - Hit return to get back to the screen that lists your kernel, and then hit
b
to boot.
More info on single user mode and rescue mode is available from the CentOS docs.
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