Do offline virtual machine migration when a centos6.5 system virtual machine can not boot into the system, the failure phenomenon as shown below:
(1) Symptom:
(2) the failure process
1, intends to enter the single-user mode to see
the result can not enter the error: sda assuming drive cache write through
2, want to enter the command line mode to see
the results of how useless press alt + F1
3, want to look into rescue mode
① see CAT / etc / fstab
② see /etc/rc.local
③ look at / var / log / the Message
④chkconfig --list
⑤ see dmesg
to see where to find clues, a large number of selinux error, Screenshot forget the
cat / etc / sysconfig / selinux, selinux start, disabled off
to reboot the system, the system successfully entered
(3) the cause
selinux cause, can not load the normal system core services