检查目录是否用bash挂载 | 检查目录是否用bash挂载

本文介绍了检查目录是否用bash挂载的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在使用

mount -o bind /some/directory/here /foo/bar

我想用bash脚本检查/foo/bar，看看是否已挂载?如果不是，则调用上面的mount命令，否则执行其他操作.我该怎么办?

I want to check /foo/bar though with a bash script, and see if its been mounted? If not, then call the above mount command, else do something else. How can I do this?

CentOS是操作系统.

CentOS is the operating system.

推荐答案

在不带参数的情况下运行mount命令将告诉您当前的安装.从shell脚本中，您可以使用grep和if语句检查安装点:

Running the mount command without arguments will tell you the current mounts. From a shell script, you can check for the mount point with grep and an if-statement:

if mount | grep /mnt/md0 > /dev/null; then
    echo "yay"
else
    echo "nay"
fi

在我的示例中，if语句正在检查grep的退出代码，该代码指示是否存在匹配项.由于我不希望在匹配时显示输出，因此将其重定向到/dev/null.

In my example, the if-statement is checking the exit code of grep, which indicates if there was a match. Since I don't want the output to be displayed when there is a match, I'm redirecting it to /dev/null.

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