A certain directory in Linux cannot be entered, causing a stuck problem

If you have folder A in a directory, the following operations will cause it to freeze directly:

1. Use ls -ls in the directory of the same level as folder A to view it. Stuck;

2. Calculating disk space in the same directory as folder A got stuck;

3. Directly cd into folder A and got stuck.

In this case, it is very likely that the directory is mounted to another address, and that address is no longer accessible.

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Solution:

1. Query the usage of the current system mount:

mount -l

2. Cancel the mount

umount 文件夹A

3. If it cannot be canceled, force the uninstall:

umount -f 文件夹A

4. If it prompts that the directory is busy, use delayed uninstallation. It will wait until the directory is not busy. Then uninstall

umount -l 文件夹A

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