centos7 -bash: /export/software/mysql/mysql8/bin/mysql: No such file or directory

This error message indicates that the shell is unable to locate the file "mysql" in the specified directory "/export/software/mysql/mysql8/bin/". This could be due to a few reasons, such as:

1. The file does not exist in the specified directory.
2. The directory path is incorrect.
3. The file does exist, but the user does not have the necessary permissions to access it.

To troubleshoot this issue, you can try the following steps:

1. Check if the file "mysql" exists in the specified directory by running the command "ls /export/software/mysql/mysql8/bin/mysql". If the file does not exist, check if you have installed MySQL correctly and if the installation directory is correct.

2. Check if the directory path is correct by running the command "ls /export/software/mysql/mysql8/bin/". If the directory does not exist, check if you have entered the correct path.

3. Check if the user has the necessary permissions to access the file by running the command "ls -l /export/software/mysql/mysql8/bin/mysql". If the user does not have the necessary permissions, you can try changing the permissions by running the command "chmod +x /export/software/mysql/mysql8/bin/mysql".

If none of the above steps work, you may need to reinstall MySQL or seek further assistance from a technical expert.