1. Managing Kernels and System Boot
  2. Using grubby to Manage Kernels
  3. Checking the Kernel Command Line Last Used to Boot The System

Checking the Kernel Command Line Last Used to Boot The System

The kernel boot parameters that were last used to boot a system are recorded in /proc/cmdline.

For more information, see the kernel-command-line(7) manual page.

  1. Check the contents of /proc/cmdline to view the kernel command line that was used to boot the running system.
    cat /proc/cmdline
    BOOT_IMAGE=(hd0,gpt2)/vmlinuz-5.15.0-208.159.3.2.el9uek.x86_64 
root=UUID=72dfa724-5feb-49e2-8869-40625bfebb01 ro 
resume=UUID=13078314-ebff-4c44-b18c-3445f6802198 
rd.luks.uuid=luks-a80f8f10-75b6-45de-b63e-64b8b6a3a94b 
rhgb quiet crashkernel=1G-64G:448M,64G-:512M