CentOS virtual machine cannot boot and displays a black screen for an extended period

Symptom

A CentOS virtual machine cannot boot and displays a black screen for an extended period.

Cause

The file libselinux.so.1 was accidentally deleted.

Solution

1. On the details page of the affected virtual machine, click Modify Configuration > CD-ROM to open the CD-ROM interface. Click Image File > Load ISO to attach a CentOS ISO file to the virtual machine.

2. Click Advanced Settings > Boot Options > Boot Order to open the boot order settings, then set the virtual machine to boot from the CD-ROM.

3. On the installation page, select Troubleshooting.

   As shown in Figure 1:

   

4. Select Rescue a CentOS system to enter rescue mode.

   As shown in Figure 2:

   

5. In the rescue mode interface, enter 1 to mount the system root filesystem to /mnt/sysimage in read-write mode. To switch /mnt/sysimage to the root directory, run the chroot /mnt/sysimage command.

   As shown in Figure 3:

   

   In rescue mode, any operation triggers the following error:

   ls : error while loading shared libraries: libselinux.so.1: cannot open shared object file: No such file or directory  

6. Run the chroot /mnt/sysimage command to mount the system.

7. Run cp /lib64/libc.so.6 /mnt/sysimage/lib64 to copy the libc.so.6 file to the system directory.

8. Restart the virtual machine. The system boots normally.