Read only file system Error

After a hard or not proper shutdown.When the system boots up.You are planning to fire a command

mkdir test

Then Linux gives you an error

Read-only file system

Here you don’t have to anything much,but to just fire some command and sit back…

sudo fsck -n -f

Reboot the server

sudo fsck <diskname(eg:- /dev/sda)>

And just give ‘yes’ to all the questions

Linux will correct all the corrupted inode and data blocks.