三個方法
- proc文件系統
- ubunut debain
- 紅帽等
proc文件系統
/proc/config.gz
This file shows you the compile-time configuration settings for the kernel (gzip compressed, use zcat or zless to see its contents). It is available only if you enable it using CONFIG_IKCONFIG_PROC when you compile.
Say you want to upgrade to the next available kernel. Your current kernel works fine, so you'd like to use the same parameters, but you accidentally lost your original .config configuration file. Simplyzcat /proc/config.gz > /usr/src/linux/.config and you're ready to go.
Example output:
Automatically generated make config: don't edit
Linux kernel version: 2.6.17
Sat Jul 15 17:01:24 2006
CONFIG_X86_32=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y
#zcat /proc/config.gz
需要開啟內核配置項CONFIG_IKCONFIG才會生成這個文件
ubuntu
-
文件下查看
/usr/src/linux-headers-VERSION-generic/.config -
從系統/boot目錄下獲取
[root@localhost ~]# uname -r
4.9.77
[root@localhost ~]# ls /boot/
config-4.9.77-30.el7.x86_64 System.map
grub System.map-4.9.77
grub2 System.map-4.9.77-30.el7.x86_64
initramfs-0-rescue-d5e5083a18b24f4db74d0c0f71770f64.img System.map-4.9.77.old
initramfs-4.9.77.img vmlinuz
initramfs-4.9.77kdump.img vmlinuz-0-rescue-d5e5083a18b24f4db74d0c0f71770f64
initrd-plymouth.img vmlinuz-4.9.77
symvers-4.9.77-30.el7.x86_64.gz
3.從系統/usr/src/kernel目錄下獲取
[root@localhost ~]# uname -r
4.9.77
[root@localhost ~]# cd /usr/src/kernels
[root@localhost kernels]# ls
4.9.77-30.el7.x86_64
[root@localhost kernels]# cd 4.9.77-30.el7.x86_64/
[root@localhost 4.9.77-30.el7.x86_64]# ls -a
. block .config drivers include Kconfig Makefile net security tools
.. certs .config.old firmware init kernel mm samples sound usr
arch config crypto fs ipc lib Module.symvers scripts System.map virt
如上所示，當前內核的編譯配置文件為：.config