BASH: Share one variable value between users -- possible?
Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
BASH: Share one variable value between users -- possible?
(Particularly user A -- me -- and root.)
I know it can be done between login shells and subshells, or subshells to the primary running shell, as in a script, with the export command. But is there something similar in BASH (or any part of Linux) for passing a value set to a variable to the same, or a similar, variable that can be "echo-ed" and otherwise used by root, just to give an example?
I am not sure if this will help but may be you can put an export statement in rc.local .
I think the OP was asking if he was already logged in and running a session and set a variable could he then make another already logged in session use that same variable. The answer is no but he can do what I wrote above.
For having all sessions by a single user use the same variable at login he can put them in the user's .bashrc or .bash_profile rather than mucking with rc.local. For all sessions by all bash users he can put it in /etc/bashrc instead.
That seems like it would be a bit involved and not really relevant to bash directly. Maybe you have an idea you'd like to expand upon as simply writing "sockets!" to me is about helpful as writing "semaphaores!"?
So basically you're asking if the users can set/modify each others environment variables? Ummm.... No, ofcourse not It would mean that you could mess up somebody's session completely by altering their variables, or even spy on them. For example by directing their shell history to a file that is readable by you.
So basically you're asking if the users can set/modify each others environment variables? Ummm.... No, ofcourse not It would mean that you could mess up somebody's session completely by altering their variables, or even spy on them. For example by directing their shell history to a file that is readable by you.
I was thinking of that OL. I thought there might be a security consideration involved (inherent?) in why it couldn't be done. I just couldn't come up with anything specific. Thanks for giving a little focus to it. BZT
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.