一.centos默认运行级别 下面是linux的默认运行级别.vim /etc/inittab即可查看. # Default runlevel. The runlevels used are: # - halt (Do NOT set initdefault to this) # - Single user mode # - Multiuser, without NFS (The same as , if you do not have networking) # - Full multiuse…
The GRUB 2 boot loader makes sure that you can boot Linux. GRUB 2 is installed in the boot sector of your server’s hard drive and is configured to load a Linux kernel and the initramfs: ■ The kernel is the heart of the operating system, allowing user…