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I installed Arch today and when I logged in I noticed that my filesystem is read only.

How can I fix this?

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assuming fstab is misconfigured and /dev/sda1 is root.romount root as rw with mount -o remount,rw /dev/sda1 /;nano /etc/fstab-----and change fstab to mount it rw – behrooz Sep 10 '12 at 18:05

migrated from stackoverflow.com Sep 10 '12 at 18:09

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I would try to figure out why the boot process or kernel marked the file system as read-only.

Normally if something is detected during boot it will try to fix the filesystem with fsck and if it can't then not mount the filesystem.

I have seen running Linux servers switch their filesystems to read-only when there was a problem with the underlying SAN and the kernel couldn't write to the SAN.

As behrooz said, it might be something as simple - bug highly unlikely - as something changed your /etc/fstab file so that your filesystems are read-only.

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