up vote 10 down vote favorite

I mounted a partition on /usr accidentally. Hence, I have lost access to sudo command and can't unmount the partion. I am using AWS EC2 instance and don't have password for root user set.

What are my options? Will reboot unmount the newly mounted partition and will I get access to content of /usr again? Or else, how can I get root access? Are there any threat of data loss or system going to unusable state after reboot?

Any help would be appreciated.

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If you have the root account (password) enabled, you can do su and then umount the partition.. – heemayl Apr 10 '16 at 3:31
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@heemayl I didn't had root account enabled. So, was out of this option. Reboot resolved the issue. – Rumit Parakhiya Apr 10 '16 at 5:42
    
A reboot will help you (as told above). This is not a weird thing. System administrators do this to save their time (by actually not creating a new mount point). Source: A Flickr DevOps. – Avineshwar Apr 10 '16 at 11:05
up vote 17 down vote accepted

Yes; a reboot will get rid of the mount.

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