Error "command not recognized" Running TSM Commands after Upgrading Tableau Server

Issue

After upgrading Tableau Server with Tableau Services Manager to a new version, issuing tsm commands results in their being executed by the old version of the tsm client instead of the newly-installed version. If the command is one not supported in the old version, the following error message is displayed:

"Command not recognized"

The command tsm version will show a mismatch between Tableau Services Manager and Tableau Server, such as:

Tableau Services Manager command line version 10500.18.0404.1406.
Tableau Server version 20181.18.0404.1605.

Environment

Tableau Server
Linux

Resolution

Log out of the current shell session and open a new one. Alternately, run the command:

source /etc/profile.d/tableau_server

Cause

When environment changes are made, some are not immediately applied to the current shell session. When a new shell session is started, it picks up the changes. This is standard *nix behavior.