Mastering Linux Security and Hardening

Resetting the password for Red Hat/CentOS

When the boot menu comes up, interrupt the boot process by hitting the down-arrow key once. Then, hit the up-arrow key once to select the default boot option:

Hit the E key to edit the kernel parameters. When the GRUB 2 configuration comes up, cursor down until you see this line:

Delete the words rhgb quiet from this line and then add rd.break enforcing=0 to the end of the line. Here's what these two new options do for you:

• rd.break: This will cause the machine to boot into emergency mode, which gives ...