Roughly speaking, there are three (combinable) methods for hacking terminals: 1. Or click here to search for specific content. I think its another bug where he was supposed to go to a new area where you meet him again but he is too weak and can die on the way.
This doesn't help you that much, but if you can find any passwords that don't match *any* of the letters in the same positions (compared to 'FESTERS', the password 'SUCKING' does not contain an 'F' at the first spot, not an 'E' on the second spot, not a 'S' on the third spot, and so on for all other letters. If you get even more letters correct, such as 5/7 with the password 'TESTERS', look for words that have various similarities, such as those ending with 'TERS'. The use stimpack, back up & talk to functions work, but the rest don't.