Permanently enable a SCL

Question

Is there a way that I can permanently enable a SCL?

I've installed rh-php56, and I would like to make sure that it is loaded every time I ssh into my machine.

I am currently running CentOS 7.

score 50 · Accepted Answer · answered May 19 '17 at 14:28

50

using scl enable actually opens a new shell inside your current one, which is quite unclean, especially if done from a login script.

You should place, instead, in your ~/.bash_profile:

source /opt/rh/rh-nginx18/enable

or:

source scl_source enable rh-nginx18

The latter is more "elegant" as it is independent from the actual installation path.

This has the effect of loading the environment in your current shell.

answered May 19 '17 at 14:28

l3g3nd4ryf0x

this also works on amazon linux Linux ip-10-1-129-214 4.14.238-125.422.amzn1.x86_64 #1 SMP Tue Jul 20 20:51:46 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux – retgoat Feb 23 '22 at 05:45

ted · Answer 2 · 2018-01-09T23:29:46.470

23

$ cat /etc/profile.d/enablepython33.sh
#!/bin/bash
source scl_source enable python33

As this works for the devtools under centos for me you could try this.

edited Jan 09 '18 at 23:29

answered Jan 09 '18 at 19:35

ted

3

This is what I do. I've created an `/etc/profile.d/scl_enable.sh` file with all of my scl files in that one file. – Jarrett Meyer Sep 26 '18 at 13:31

score -3 · Answer 3 · edited May 07 '21 at 19:15

-3

I think you could add a line into your shell profile (e.g. ~/.bash_profile) to enable your scl of choice. For example,

scl enable rh-nginx18 bash

EDIT: marked as spoiler since this is dangerous

Reload your profile or logout/login, and you should have access to your SCLs.

edited May 07 '21 at 19:15

olore

answered May 15 '16 at 21:39

Michael Skelton

7

One problem with this is that your resulting bash is no longer a login shell. And you can't _make_ it a login shell. If you try, you'll fork bomb your system. This may work in some circumstances, but it's not the recommended method. – Michael Hampton Jan 10 '18 at 02:59
4

CAREFUL! Adding an scl command like the above just got me a "frozen" login because the script got stuck for some reason. Have this page for a handy reference for when you get locked out: https://serverfault.com/questions/94503/login-without-running-bash-profile-or-bashrc – Lance Kind Aug 22 '19 at 21:33
1

The accepted response is DANGEROUS, and should be somehow demoted or removed. Adding this so maybe people will notice it before forkbombing themselves :) – Dan Vatca Dec 04 '19 at 08:14
This fork bombed me and should be instantly removed. – Michael Chourdakis Dec 02 '20 at 22:17

3 Answers3