Adding Dependencies to the `saslauthd.service` File

The saslauthd process handles plaintext authentication requests on behalf of the SASL library. It isolates all code requiring superuser privileges into a single process, and it can be used to provide proxy authentication services to clients that do not understand SASL based authentication.

The saslauthd service must start after the secfs-fs-barrier service:

1. As a root user, open the saslauthd.service file in a text editor such as vi.

   For example, the saslauthd.service file is located in /usr/lib/systemd/system/saslauthd.service.

2. Locate the [Unit] area in the file and add the following two lines at the end of the [Unit] section:

   After=secfs-fs-barrier.service
BindsTo=secfs-fs-barrier.service

   For example, the saslauthd.service file might have the following existing [Unit] section:

   [Unit]
After=syslog.target
After=network.target

   In this case, you would add the two new lines after After=network.target.

3. Save and close the saslauthd.service file.

4. To force the system to re-read the systemd configuration files that you changed in this section and the previous section, type systemctl daemon-reload.

5. Start each application that you shut down to make the configuration changes.