I was able to connect to Remote Agent; I accidentally removed remote work directory, I guess I must have remove the remoting.jar file.

This is the first time I tested, so if there is anyway to re-create the remoting.jar file or recreating the whole thing to bypass the following error

11/18/20 18:02:04] [SSH] Starting sftp client.
[11/18/20 18:02:04] [SSH] Copying latest remoting.jar...
Source agent hash is D866F0B482DB94F38E49B26B465D5DB5. Installed agent hash is D866F0B482DB94F38E49B26B465D5DB5
Verified agent jar. No update is necessary.
Expanded the channel window size to 4MB
[11/18/20 18:02:40] [SSH] Starting agent process: . /var/dbb/conf/gitenv.sh cd "/u/rxyz/Jenkins-PC" && /usr/lpp/java/J8.0_64/bin/java -jar remoting.jar -workDir /u/rxyz/tmp -jar-cache /u/rxyz/tmp/remoting/jarCache-text
Error: Unable to access jarfile remoting.jar
Agent JVM has terminated. Exit code=1
[11/18/20 18:02:40] Launch failed - cleaning up connection
[11/18/20 18:02:40] [SSH] Connection closed.