Vyřešil jsem to zakomentováním v /etc/fstab
root@vps:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/xvda1 during installation
# UUID=cfeb5d31-2080-4dfe-9dd9-bf0344e1832c / ext4 errors=remount-ro 0
jenže to asi znamená read-only file system...