See the WORKBENCH project page. To use WORKBENCH, you’ll use the module tool.

You can see what versions are available by using:

[me@login01 ~]$ module avail workbench

------------------------------ /opt/modulefiles -------------------------------
   workbench/1.5.0

Use "module spider" to find all possible modules and extensions.
Use "module keyword key1 key2 ..." to search for all possible modules matching
any of the "keys".

To load a specific version, you would use:

[me@login01 ~]$ module load workbench/1.5.0

while the "workbench" wildcard will load the default version, workbench-1.5.0 in this case.

You should now be able to run WORKBENCH commands:

[me@login01 ~]$ wb_command

Version: 1.5.0
Commit Date: 2021-02-16 13:46:47 -0600
Operating System: Linux

Information options:
  -help                       show this help info
  -arguments-help             explain the format of subcommand help info
  -global-options             display options that can be added to any command
  -parallel-help              details on how wb_command uses parallelization
  -cifti-help                 explain the cifti file format and related terms
  -gifti-help                 explain the gifti file format (metric, surface)
  -volume-help                explain volume files, including label volumes
  -version                    show extended version information
  -list-commands              list all processing subcommands
  -list-deprecated-commands   list deprecated subcommands
  -all-commands-help          show all processing subcommands and their help
                                  info - VERY LONG

To get the help information of a processing subcommand, run it without any
  additional arguments.

If the first argument is not recognized, all processing commands that start
  with the argument are displayed.