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Description of problem:
Every PAM session has scope unit associated with it. In the session creation process, we also create stub unit file for the given scope unit alongside drop-in configuration for it. However, when the session ends we don't delete this stub unit file.

Version-Release number of selected component (if applicable):
systemd-219-42.el7_4.7

How reproducible:
always

Steps to Reproduce:
1. ssh into the machine
2. cat /run/systemd/system/session-${XDG_SESSION_ID}.scope
3. log out
4. ssh back again
5. env | grep XDG_SESSION_ID (session ID should be different)
6. verify that old session scope unit file is still present

Actual results:
Old session-${XDG_SESSION_ID}.scope unit file present in /run/systemd/system

Expected results:
Unit file is deleted when session ends

Additional info:
https://github.com/lnykryn/systemd-rhel/pull/186

qa_ack+ for RHEL 7.6

fix merged to staging branch -> https://github.com/lnykryn/systemd-rhel/pull/186 -> post

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3245