Getting into Single User Mode in CentOS 5 [StartupCTO]

Last Updated: 14 Oct 2023

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Author: dordal

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= Getting into Single User Mode in CentOS 5=


Unlike [[Server Tech:FreeBSD|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:<code bash>bash# reboot</code>
 * 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 press ''e'' again.
 * It will now display something like:<code bash><0/LogVol00</code>Enter ''<space> single'' after that, so you've got:<code bash><0/LogVol00 single</code>That tells CentOS to boot at run-level 1 in single user mode. You can also type ''emergency'' instead of ''single'', 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 [[http://www.centos.org/docs/2/rhl-cg-en-7.2/rescuemode.html|available from the CentOS docs]].

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