Shebang Update for Compatibility Across RHEL Versions

[shi-vaniparmar]

This PR updates Python shebangs from:

#!/usr/bin/python
to:
#!/usr/bin/env python
Reason for Change
On RHEL 8 and RHEL 9, it is not permitted (and not recommended) to modify or symlink the platform-provided /usr/bin/python. This path is managed by the system and reserved for platform tooling.

To ensure consistent and portable execution of Python scripts across environments — without interfering with system Python — we:

• Use /usr/bin/env python as a more flexible and version-agnostic shebang.

• Recommend setting up custom Python symlinks in:

  • /usr/local/bin

  • ~/bin

This allows each environment to control which Python interpreter is used when invoking python, without relying on or modifying the system Python binary.

Benefits

• Cross-version compatibility (RHEL 8/9)

• Cleaner separation from platform Python

• Easier integration with virtual environments or user-installed interpreters

[Bischoff]

Thanks for the PR @shi-vaniparmar .

On Ubuntu, I see this as the shebang, in the installed files (like /usr/bin/zvmsdk-getpchid):

#!/usr/bin/python3

and not

#!/usr/bin/python

as I can see in the source code.

I think that the shebang line gets modified by the "debian helper":

%: 
       dh $@ --with python3 --buildsystem=pybuild

I am not sure how this helper will behave with your changed shebang. I think it will just not care, but to be on the safe side, in theory, we should try to repackage the Ubuntu version with your change...

[Bischoff]

Also:

scripts/zvmsdk-gentoken uses #!/bin/python as shebang.

Maybe it would need to be modified as well.

[Bischoff]

See my 2 suggestions:

• check that ubuntu packaging still works after shebang change
• modify one more file in this PR

[aazam-gh]

@shi-vaniparmar can you test the ubuntu packaging for this change?