Thank you for visiting this page, this page has been update in another link How to change files under linux maintenance mode
When system boots into maintenance, it mounts / as read only mode. When you want to fix it, it doesn't allow writing. Here is a way to fix without envolving recue CD booting. mount -o remount,rw / Now, you have write permission to / file system. For other types of booting problems, for example, driver issue, rpm issue, which cause system can't boot, take a look this article https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/ap-rescuemode.html#s1-rescuemode-booting-single |