How to fix “sudo: unable to open … Read-only file system”?

Lucas April 30, 2021


-bash: cannot create temp file for here-document: Read-only file system

Try to remount:


mount -o remount /
mount -o remount,rw /

Or try to fix filesystems:


sudo fsck -Af -M
sudo fsck.ext4 -f /dev/sda2
sudo reboot

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