RHEL 7 / CentOS 7 single user mode
Single User Mode
For RHEL 7/CentOS 7
Interrupt boot at grub using the e key.
rd.break to the end of the kernel line
When booted to single user mode:
mount -o remount,rw /sysroot
Make whatever changes you need to make the system usable.
Fix selinux labels!
Exit out to reboot Verify host up and working
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