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I need to restore a directory on a Linux (CentOS) file server from an external USB drive. It's the only copy, and I don't want to risk any of the data being altered on it by some mistake with rsync or whatever.
How can I mount an external USB drive on Linux in read-only, just for the temporary purposes of copying the files off of it?
This is how it looks normally in /etc/fstab:
/dev/usblaciexl1 /backup ext3 noauto,defaults 0 0