Always source bashrc in AlmaLinux / RedHat based system

Question

I have an infrastructure that mostly consists of Ubuntu machines and many users. We like to use X2GO for remote access, which works well. We now have an AlmaLinux 8.8 machine. When login onto that one with X2GO and opening a terminal, the prompt is messed up and only writes something like bash-4.4$ . We figured out that this is because opening a terminal in X2GO is not a login shell (sorry, not so sure anymore, see edit) and thus the /etc/bashrc is not sourced by the /etc/profile. The Ubuntu system is somehow configured to work without a local .bashrc in the user's home directory. Thus, all home dirs are created without a .bashrc.

I want to fix that on the AlmaLinux machine by always sourcing the /etc/bashrc. This is because I do not have access to the mechanism that creates new homes for new users, and I do not want to create/tell all users to have a local .bashrc. Is there a way to realize that? I do have sudo rights on the Alma machine.

[Edit] After checking again, I noticed this block in the /etc/profile:

if [ -n "${BASH_VERSION-}" ] ; then
        if [ -f /etc/bashrc ] ; then
                # Bash login shells run only /etc/profile
                # Bash non-login shells run only /etc/bashrc
                # Check for double sourcing is done in /etc/bashrc.
                . /etc/bashrc
       fi
fi

Answer 1

Your explanation is a bit off. Login shells do read the profile family of files, but they don't read the bashrc ones; it's non-login shells that don't read profile but do read bashrc. As for Ubuntu, yes, it may be set up to not have local .bashrc, presumably by not having one at /etc/skel. You could add a default file there which should then be copied for all new users.

As for having your login shells read bashrc, I would personally suggest having the settings you need in /etc/profile instead, but if you don't want that, you can make /etc/profile source /etc/bash.bashrc. Just add this to your /etc/profile:

if [ "${BASH-}" ] && [ "$BASH" != "/bin/sh" ]; then
  if [ -f /etc/bash.bashrc ]; then
    . /etc/bash.bashrc
  fi
fi

This will source /etc/bash.bashrc if the shell reading /etc/profile is bash and is not bash as /bin/sh (bash in POSIX mode). A few Linux distributions do this by default, as far as I know only those in the Debian family, but maybe others as well. Note that this assumes your /etc/bash.bashrc has code to exit if the shell is not interactive. On my Arch, this looks like:

# If not running interactively, don't do anything
[[ $- != *i* ]] && return

If you don't have a similar line in your /etc/bash.bashrc, add one so that you do not read it for non-interactive shells where you realy don't want the settings in bashrc to be active.