# ./scripts/replace-md5sums.py bash: ./scripts/replace-md5sums.py: Permission denied
replace-md5sums.py has chmod 600
replace-md5sums.py
I solved my problem. it's just the version of python which the interpreter reads off the first line. removing to version numbers did it for me, i.e.
#!/usr/bin/python2.7 --> #!/usr/bin/python