Attaching storage.
WHAT MOUNTING IS
Attaching a file system to a directory in the tree.
WHAT A MOUNT POINT IS
The directory it appears at.
HOW TO SEE WHAT IS MOUNTED
The mount command, or df.
WHAT THE FILE SYSTEM TABLE IS
The configuration listing what is mounted at boot.
WHY IT DESERVES RESPECT
An error in it can prevent the machine booting.
WHAT TO DO AFTER EDITING IT
Test with a mount command that reads it, before rebooting.
WHAT COMMON OPTIONS MEAN
Read only No execution of binaries No device files No setting of user identity on execution
WHERE THOSE MATTER
Temporary directories, where restricting execution removes a common attack route.
WHAT TO CHECK ON A SERVER
Whether the temporary directory is a separate mount with restrictions.
WHAT A LOOP DEVICE IS
A file presented as a block device.
WHERE THAT IS USED
Creating a secured temporary directory without repartitioning.
WHAT TO DO BEFORE UNMOUNTING
Ensure nothing is using it.
HOW TO FIND WHAT IS
lsof or fuser against the mount point.
WHAT A BUSY ERROR MEANS
A process has a file open there.
WHAT TO NEVER DO
Force an unmount on a file system being written.
