Putty Inactive problem

Problem:

1.Usually I will put some compilation in server through putty and leave for the lunch. after some timeout period, putty will goes to inactive mode.
But the server is compiling our code
2.After sometimes, I come back. There is a chance like due to slowness of the server,it might takes some more time to complete the compilation.
    

        How can we ensure the completion of compilation in this scenario ?

Solution:
  we can give compilation command | tee log.txt and redirects the compilation output to file log.txt. Once the compilation is done, the compilation message /errors will be stored in log.txt. From this log.txt, we can figure out whether compilation is completed or not.