Troubleshooting TFTP PUT or Tomcat startup failures on RHEL or Oracle Linux

Issue

You may experience the following issues in TrueSight Network Automation environments on Red Hat Enterprise Linux (RHEL) or Oracle Linux platforms:

• The PUT command using Trivial File Transfer Protocol (TFTP) fails with a permission error.
• The TrueSight Network Automation Tomcat web service fails with a permission error.

Resolution

To resolve these issues, set the SELinux mode to Permissive, as follows:

1. Log on to the computer as a root user.
2. Run the getenforce command to check the SELinux configuration.
3. If the previous command returns Enforcing, do one of the following to set the mode to Permissive:  
   • To set the mode to Permissive temporarily, run the following command: setenforce 0
   • To set the mode to Permissive permanently (boot time), do the following:
     1. Open the /etc/selinux/config file with a text editor.
     2. Change the value of SELINUX to permissive, as follows:
        SELINUX=permissive
     3. Save the file.
     4. Reboot the computer.
4. Verify that the getenforce command returns Permissive.