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  • centos 修改默认启动内核,及删除无用内核

    #使用cat /boot/grub2/grub.cfg |grep menuentry  查看系统可用内核
    [root@bigapp-slave27 ~]# 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 (3.10.0-514.16.1.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-6f5840d0-55ac-4d3b-899b-61c0297c5347' {
    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-6f5840d0-55ac-4d3b-899b-61c0297c5347' {
    menuentry 'CentOS Linux (0-rescue-d57307c454c0437d91c309347178cdf5) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-d57307c454c0437d91c309347178cdf5-advanced-6f5840d0-55ac-4d3b-899b-61c0297c5347' {
     
    #查看当前内核
    [root@bigapp-slave27 ~]# uname -r
    3.10.0-514.16.1.el7.x86_64
     
    #修改开机时默认使用的内核
    grub2-set-default 'CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)'
     
    #查看内核修改结果
    [root@bigapp-slave27 ~]# grub2-editenv list
    saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)
     
    #查看系统安装了哪些内核包
    [root@bigapp-slave27 ~]# rpm -qa |grep kernel
    kernel-3.10.0-327.el7.x86_64
    kernel-headers-3.10.0-514.6.1.el7.x86_64
    kernel-tools-libs-3.10.0-327.el7.x86_64
    kernel-3.10.0-514.16.1.el7.x86_64
    kernel-tools-3.10.0-327.el7.x86_64
     
    #使用yum remove 或rpm -e 删除无用内核
    yum remove kernel-3.10.0-327.el7.x86_64
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  • 原文地址:https://www.cnblogs.com/zhaoying/p/11738137.html
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