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  • Centos7修改默认启动内核

    使用cat /boot/grub2/grub.cfg |grep menuentry 查看系统可用内核

    [user@levi ~]$ sudo cat /boot/grub2/grub.cfg |grep menuentry
    [sudo] user 的密码:
    if [ x"${feature_menuentry_id}" = xy ]; then
      menuentry_id_option="--id"
      menuentry_id_option=""
    export menuentry_id_option
    menuentry 'CentOS Linux (3.10.0-1127.10.1.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-693.el7.x86_64-advanced-dab6beec-5c9d-44e8-8def-fc53433a2d7c' {
    menuentry 'CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-693.el7.x86_64-advanced-dab6beec-5c9d-44e8-8def-fc53433a2d7c' {
    menuentry 'CentOS Linux (0-rescue-e8af2a79032945b6a23f24f1fb8a7912) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-e8af2a79032945b6a23f24f1fb8a7912-advanced-dab6beec-5c9d-44e8-8def-fc53433a2d7c' {
    
    

    查看当前内核

    [user@levi ~]$ uname -r 
    3.10.0-693.el7.x86_64
    

    修改开机时默认使用的内核

    [user@levi ~]$ sudo grub2-set-default 'CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core)'
    

    查看内核修改结果

    [user@levi ~]$ sudo grub2-editenv list
    saved_entry=CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core)
    

    查看系统安装了哪些内核包

    [user@levi ~]$  rpm -qa |grep kernel
    abrt-addon-kerneloops-2.1.11-48.el7.centos.x86_64
    kernel-3.10.0-1127.10.1.el7.x86_64
    kernel-tools-3.10.0-1127.10.1.el7.x86_64
    kernel-tools-libs-3.10.0-1127.10.1.el7.x86_64
    kernel-tools-3.10.0-693.el7.x86_64
    abrt-addon-kerneloops-2.1.11-57.el7.centos.x86_64
    kernel-headers-3.10.0-1127.10.1.el7.x86_64
    kernel-devel-3.10.0-1127.10.1.el7.x86_64
    kernel-3.10.0-693.el7.x86_64
    kernel-devel-3.10.0-693.el7.x86_64
    kernel-tools-libs-3.10.0-693.el7.x86_64
    kernel-headers-3.10.0-693.el7.x86_64
    
    

    使用yum remove 或rpm -e 删除无用内核

    [user@levi ~]$ sudo yum remove kernel-3.10.0-1127.10.1.el7.x86_64
    已加载插件:fastestmirror, langpacks
    正在解决依赖关系
    ......
    

    参考:http://www.cnblogs.com/niyeshiyoumo/p/6762193.html

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  • 原文地址:https://www.cnblogs.com/levi125/p/13523114.html
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