all file system went suddenly Read Only

I am Working on a fedora server with cpanel,
suddenly all the file system become unwritable,
and when trying to run anything that write to files , i see this messages
"Read-only file system"

and of course there is no logging working for anything , Now i cant see any reason for the problem.

mount -l shows that all are r,w

what should i DO ?

and why did that happen from itself , does anybody faced something like that before ? could it be a hack ?

 

 

 

 

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