So, the common approach for sourcing ROOT seems to be just including source /path/to/root/bin/thisroot.sh in your ~/.bashrc I was thinking that in order for it to work for all users, you could do the same in /etc/bash.bashrc (but that doesn’t seem to work). And that for it to work also when acc…

I’m doing version installations under /opt; e.g. /opt/root-6.10.02, and then I thought I can just set up aliases for the different version (if I can only get this bit to work). I’m thinking that having users install different versions under /usr or /home will lead to several instances of the same ve…

That’s more or less what I say, too. Just do NOT put any “default ROOT” settings in any standard “environment” files. Every user should always be expected to source an appropriate “thisroot.[c]sh” for the ROOT version that [s]he wants to use. Note: you can easily create shell aliases for them (an…

I am a big fan of using environment-modules. This permits the user a quick way to see what is available and switch in various version as they need: $ module avail -------------------- /usr/local/Modules/3.2.10/modulefiles --------------------- dot module-info …

another possibility is to use direnv: https://direnv.net/ it works on a per-directory basis. e.g $> mkdir -p foo/bin $> cd foo $> cat > .envrc export FOO=`pwd` export PATH=$FOO/bin:$PATH ^C ## do the following only once $> direnv allow . $> echo $FOO /home/binet/foo no need for special privile…

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Wile_E_Coyote August 11, 2017, 9:33am 2

Missing Canvas ROOT

Honestly speaking, sooner or later, you will learn by hard that the policy of using a “system-provided” ROOT version (e.g. in “/usr/[bin|lib]” or “/usr/local/[bin|lib]”) is a dead end. You will learn that you need something like three different versions of ROOT - just because something that works with a particular ROOT version is not working with another ones, or because some piece of your additional, experiment / analysis specific, software explicitly requires a particular ROOT version. The s…

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