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  CentOS card fails to start at boot progress bar certmonger solve
  Add Date : 2017-08-31      
  Newly installed CentOS6.4, first boot progress bar will be stuck in there, I thought it was a slow response to the need to wait for some time, about 5 minutes or not, is estimated to be a problem.

After rebooting press Esc or F5 key, you can view the system boot process, the card where I was OK after the start certmonger stuck:

Causes: X11 graphical interface service caused by lead can not boot into the graphical interface.
Modify the configuration file / etc / X11 /

By Ctrl + Alt + F2 to enter the CLI interface, log in as root, execute the following command
mv /etc/X11/xorg.conf /etc/X11/old_xorg.conf
If you can not enter the command line interface, when can boot into the single mode, and then modify it.
Modify the startup level (I used this approach, because the graphical interface for me useless, but the system installation specification which was installed)

vim / etc / inittab
. # 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: # The bottom row of 3 to 5, the default to enter the command line interface
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