Is it possible to suspend a bash that was invoked by another bash? For example, if I use
su to become a different user but want to switch back to my own user for a moment. For another example, in an SSH session, I can use the ~ shortcut (~, ^Z) to suspend the remote shell and return to my local shell (but that's obviously an SSH feature, not the shell).
bash intercepts ^Z to do its own process control, so it must be a separate command (if it's even supported). But trying to find it only results in information about the normal process control.