如何解决centos虚拟机无法启动？
用VMware虚拟机创建的一个centos桌面版系统。系统启动时出现问题，在启动certmonger之后，界面卡住，无法进入图形界面，如图：
解决方法：
首先，Ctrl+Alt+F2进入命令行界面，用root用户登录，查看/etc/X11/xorg.conf文件是否存在，如果存在，则执行命令：
mv /etc/X11/xorg.conf /etc/X11/old_xorg.conf
重启系统，看是否正常。
然后Ctrl+Alt+F2进入命令行界面，用root用户登录，修改文件/etc/inittab
vim/etc/inittab
# inittab is only used by upstart for the default runlevel.# ADDING OTHER CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.# System initialization is started by /etc/init/rcS.conf# Individual runlevels are started by /etc/init/rc.conf# Ctrl-Alt-Delete is handled by /etc/init/control-alt-delete.conf# Terminal gettys are handled by /etc/init/tty.conf and /etc/init/serial.conf,# with configuration in /etc/sysconfig/init.# For information on how to write upstart event handlers, or how# upstart works, see init(5), init(8), and initctl(8). # Default runlevel. The runlevels used are:# 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# 4 - unused# 5 - X11# 6 - reboot (Do NOT set initdefault to this)#id:5:initdefault:
将最后一行id:5:initdefault:修改为id:3:initdefault:则开机默认进入命令行界面。
重启进入命令行之后，执行startx，则可进系统图形界面了！
相关参考：centOS教程
