☰

为什么我的命令没有将我的分区重新安装为只读？

tag-icon • tag-icon 14.04 command-line mount
为什么我的命令没有将我的分区重新安装为只读？

通过终端，我使用mount命令找到要重新挂载为只读的磁盘分区。我正在处理的具体分区是/dev/sdb2。

我尝试使用此命令将磁盘重新安装为只读，期望磁盘重新安装为只读：

mount -o remount,r /dev/sdb2

没有错误输出。

但是当我进入磁盘时，我可以在磁盘上创建文件，提示磁盘未以只读方式挂载。为什么会这样？

答案1

-o在或 Mount Options的上下文中，r不等同于“只读”；事实上，它甚至不存在。您需要改用ro-​​ 完整命令如下：mount -o remount,ro /dev/sdb2

唯一r作为选项存在的地方mount是作为参数，而不是安装选项。

我从 上的手册页中mount摘取了一些信息部分供您参考。#前面的注释是我自己写的，并非来自手册页。

# 'mount' command arguments (NOT mount options, which are passed via `-o`!)

   -r, --read-only
          Mount the filesystem read-only. A synonym is -o ro.

   -o, --options opts
          Options are specified with a -o flag followed by a  comma  sepa‐
          rated string of options. For example:

                 mount LABEL=mydisk -o noatime,nouser


# FILESYSTEM INDEPENDENT MOUNT OPTIONS

   remount
          Attempt to remount an already-mounted filesystem.  This is  com‐
          monly  used  to  change  the mount flags for a filesystem, espe‐
          cially to make a  readonly  filesystem  writable.  It  does  not
          change device or mount point.

          The remount functionality follows the standard way how the mount
          command works with options from fstab. It means the  mount  com‐
          mand doesn't read fstab (or mtab) only when a device and dir are
          fully specified.

          mount -o remount,rw /dev/foo /dir

          After this call all old mount options are replaced and arbitrary
          stuff  from  fstab  is ignored, except the loop= option which is
          internally generated and maintained by the mount command.

          mount -o remount,rw  /dir

          After this call mount reads fstab (or  mtab)  and  merges  these
          options with options from command line ( -o ).

   ro     Mount the filesystem read-only.

   rw     Mount the filesystem read-write.

相关内容