centos7 選定默認啟動內核，及刪除無用內核
阿新 • • 發佈：2018-11-24
root 修改 pan list 開機 mov default try option
轉自 https://www.cnblogs.com/niyeshiyoumo/p/6762193.html centos7 選定默認啟動內核，及刪除無用內核 #使用cat /boot/grub2/grub.cfg |grep menuentry 查看系統可用內核 [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‘ { #查看當前內核 [root@bigapp-slave27 ~]# uname -r 3.10.0-514.16.1.el7.x86_64 #修改開機時默認使用的內核 grub2-set-default ‘CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)‘ #查看內核修改結果 [root@bigapp-slave27 ~]# grub2-editenv list saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core) #查看系統安裝了哪些內核包 [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 刪除無用內核 yum remove kernel-3.10.0-327.el7.x86_64
centos7 選定默認啟動內核，及刪除無用內核