How do I check the current boot parameter list in Linux?

Question

During test, I sometimes add/change boot parameters to /boot/grub/menu.lst (suse), or at the grub screen during boot.

How do I check what boot parameters have been used after the system is done booting?

score 59 · Accepted Answer · answered Aug 06 '12 at 19:14

The bootloader (grub in this case) will pass the boot parameters to the Linux kernel in a memory buffer called the kernel command line. The kernel command line, along with other console messages output during boot, should be in the system log, retrievable with the dmesg command.

A copy of the kernel command line is also in the file /proc/cmdline.

Vladimir Perepechenko · Answer 2 · 2024-01-06T16:15:09.517

1

If your boot type is EFI, you can just type in cli after Linux booted:

efibootmgr -v

to see the current boot options and which partition/device you booted from.

Look at man efibootmgr if you are curious.

edited Jan 06 '24 at 16:15

answered Jan 05 '24 at 13:22

Vladimir Perepechenko

11

How do I check the current boot parameter list in Linux?

2 Answers2