Permanently enable RHEL scl

Is there a way to permanently enable custom Software Collections for RedHat?

I have installed an scl to provide python27 in RHEL6 and don't want to have to enable the custom scl every time.

Well, you could add something to your startup script to source the enable script.

Eg add to your .bash_profile (note space between initial dot and /)

. /opt/rh/python27/enable

This option sounds dangerous to me for root. I would think something like the following would be safer and more appropriate:

You can create a function that takes command line options. Think of this as an alias on steroids. Add the following to your .bashrc

python27() {
scl enable python27 “python $*”
}

Then test:

python27 –version
Python 2.7.5

This doesn’t help with your magic line in scripts, but will make it easier to call scripts:

[smccarty@keith ~]$ cat script.py
#!/usr/bin/env python27

import sys

print “Hello, World!”, sys.version

Call it normal and notice, the default installation of python is used:

[smccarty@keith ~]$ ./script.py
Hello, World! 2.6.6 (r266:84292, Sep 4 2013, 07:46:00)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)]

Call it with our alias, and notice that Python 2.7 is used:

[smccarty@keith ~]$ python27 script.py
Hello, World! 2.7.5 (default, May 23 2013, 06:08:09)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)]

来源：https://stackoverflow.com/questions/21264601/permanently-enable-rhel-scl

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