How to use shell scripts to change the current working path

How to use shell scripts to change the current working path-Linux general technology-Linux programming and kernel information. The following is a detailed description. There are three methods for executing shell scripts.

Bash Script Name sh Script Name chmod + x Script Name

Use the following statement to test

# A. sh (the extension is optional)
Cd/
Pwd
Echo "complete"

However, during actual execution, the path is changed, but the final result is that the path is not changed.

[Fedora @ localhost ~] $ Bash a. sh
/
Complete
[Fedora @ localhost ~] $

Cause analysis:

When the script is executed, only a sub-process is opened under the current shell. The directory switch operation is only valid for subsequent commands in the process, but cannot change the directory of the parent process.

Solution:
Method 1: Use source a. sh.
Method 2:

[Fedora @ localhost ~] $ Cd ~
[Fedora @ localhost ~] $ Chmod u + x a. sh
[Fedora @ localhost ~] $ ../A. sh
/
Complete
[Fedora @ localhost/] $

For $ ../a. sh
The first point is the bash Internal Command, indicating to run in the Current shell
"./A. sh" is the command parameter, that is, the script to be executed.

Note: there must be a space between two points.