View Linux Kernel Config Options

Question

Is it possible to view which flags were used during kernel compilation? 2.6.42.12-1 fedora 15.

I am sure I've done this before but I can't find anything on google (ie i look for wrong thing :/ ).

Solution 1

Current kernel config:

cat /boot/config-`uname -r`

Other installed kernels:

ls /boot/config-*

Solution 2

cat /proc/config.gz | gunzip

if kernel was compiled with corresponding option (usually it is)

Comments

[Ciro Santilli OurBigBook.com]

possible same on SU: superuser.com/questions/287371/…

[Peter Hlavatík]

what is that "corresponding option"?

[mirh]

CONFIG_IKCONFIG_PROC=y