修改登录方式
# cd /etc/# vi inittab
# 0 - halt (Do NOT set initdefault to this)# 1 - Single user mode# 2 - Multiuser, without NFS (The same as 3, if you do not have networking)# 3 - Full multiuser mode（命令行模式）# 4 - unused# 5 - X11（图形化模式）# 6 - reboot (Do NOT set initdefault to this)#id:3:initdefault:
ssh中不允许root用户登录：修改/etc/ssh/sshd_config中PermitRootLogin no
