当我启动时，我总是会得到登录终端（而不是 GUI）。我总是必须使用恢复模式并重新安装 Ubuntu 分区：
$ mount -o rw,remount /
之后，我进入了正常的登录界面。这是我的fstab内容：
# /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/sda1 during installation
/dev/disk/by-uuid/f573b350-2491-47d4-93cf-3d403cbbe3e0 /mnt/f573b350-2491-47d4-93cf-3d403cbbe3e0 auto nosuid,nodev,nofail,x-gvfs-show 0 0
/dev/disk/by-uuid/59A2385E617A5117 /mnt/59A2385E617A5117 auto nosuid,nodev,nofail,x-gvfs-show 0 0
/dev/disk/by-uuid/5df08936-a7c1-4836-aef8-d8e6591da647 /mnt/5df08936-a7c1-4836-aef8-d8e6591da647 auto nosuid,nodev,nofail,x-gvfs-show 0 0
如何自动挂载 / 并使其永久可写？每次重新启动 Ubuntu 时，我都必须重做这些步骤。