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Linux CentOS 7.X 如何修改内核启动默认顺序

 

我们知道,centos 6.x是通过/etc/grub.conf就行内核启动顺序修改的,而且比较直观查看。但centos 7的系统和6就不一样了,是通过grub2为引导程序。下边简单说下centos 7的内核启动顺序如何修改。
1,首先查看当前系统有几个内核。比如:

[root@localhost ~]# cat /boot/grub2/grub.cfg |grep menuentry 
if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
  menuentry_id_option=""
export menuentry_id_option
menuentry 'CentOS Linux (3.10.0-327.22.2.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-327.el7.x86_64-advanced-80b9b662-0a1d-4e84-b07b-c1bf19e72d97' {
menuentry 'CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-327.el7.x86_64-advanced-80b9b662-0a1d-4e84-b07b-c1bf19e72d97' {
menuentry 'CentOS Linux (0-rescue-7d26c16f128042a684ea474c9e2c240f) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-7d26c16f128042a684ea474c9e2c240f-advanced-80b9b662-0a1d-4e84-b07b-c1bf19e72d97' { 

 

2,设置默认的启动内核。比如我们选择上边中的CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)这个内核为默认启动。

[root@localhost ~]# grub2-set-default "CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)" 

配置默认内核
验证是否修改成功:

[root@localhost ~]# grub2-editenv list 
saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)

原文链接:Linux CentOS 7.X 如何修改内核启动默认顺序,转载请注明来源!

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