Troubleshooting Automatic-Update Problems on Enterprise Agents

ThousandEyes software is architected to run a version check upon check-in with the ThousandEyes collector. This process will validate the currently installed version of the agent against the expected version in our system. If running a version lower than the expected version, the Agent will download the required packages, and update them.
This process is run during the update:
Red Hat Enterprise Linux/CentOS
apt-get update
yum update
apt-get install te-agent
yum install te-agent
apt-get install te-browserbot*
yum install te-browserbot*
* The te-browserbot package is only required for instances running a browserbot installation. This does require additional resources on a Enterprise Agent (minimum 2GB RAM is recommended)
GPG error: lucid Release: the following signatures couldn't be verified because the public key is not available: NO_PUBKEY C99A1F5BE718900
When this occurs, a manual download and registration of the ThousandEyes public key is required. This can be done in either one or two steps: the one-step approach is shown below:
wget -q -O- | sudo apt-key add -
This will download and register the ThousandEyes public key, which will allow you to re-run the steps above as required in order to update the agent codebase.