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将 Ubuntu Server 14.04 LTS 升级到 16.04 LTS 后系统变为只读

tag-icon • tag-icon 14.04 server 16.04 upgrade
将 Ubuntu Server 14.04 LTS 升级到 16.04 LTS 后系统变为只读

今天，我将 Ubuntu 服务器从 14.04 升级到 16.04 sudo do-release-upgrade，升级过程非常顺利，直到它重新启动并且我登录时看到以下消息：

Unable to setup logging. [Error 30] Read only file system:
'var/log/landspace/sysinfo.log' 

run-parts: /etc/update-motd.d/50-landscape-sysinfo exited with return code 1

/usr/lib/ubuntu-release-upgrader/release-upgrade-motd: 39: /usr/lib/ubuntu-release-upgrader/release-upgrade-motd: cannot create /var/lib/ubuntu-release-upgrader/release-upgrader-available: Read-only file system

/usr/lib/update-notierfier/update-motd-fsck-at-reboot: 33: /usr/lib/update-notifier/update-motd-fsck-at-reboot: cannot create /usr/liv/update-notifier-fsck-at-reboot: Read-only file system

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

所以我认为系统是只读的，如果文件系统或磁盘出现某种错误/损坏，这是一种预防措施？

所以我的问题有两个：

  1. 究竟发生了什么事？
  2. 我如何解决它？

不知道这是否相关，但是当 Raid 5 中有 6 个驱动器时，操作系统正在通过 USB 笔运行。

提前致谢！

显然，我可以重新安装操作系统并重新设置所有内容，这只需要几个小时，但我真的想学习和理解它:)

编辑1

dmesg 日志添加：http://pastebin.com/0bP8T4hH

编辑2

/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/sda1 during installation
/dev/md0        /mnt/rdisk      ext4    user    0       0

答案1

无论出于什么原因，您/etc/fstab甚至没有提到目录根目录的挂载点。假设您实际上已启用系统/dev/sdg1，请按如下方式修改文件：

# /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/md0        /mnt/rdisk      ext4    user    0       0
/dev/sdg1       /               ext4            rw,noatime,data=ordered 0 1

重新启动以测试它是否有效，但实际上我不建议/dev/sdg1直接在文件中使用，因为设备名称可能会更改。您最好使用文件系统的 UUID。要找到它，请执行。然后在 中ls -l /dev/disk/by-uuid/ | grep sdg1替换/dev/sdg1为。UUID=The-Number-You-Just-Got/etc/fstab

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