I have a program (which I cannnot modify) which runs for > 1 day. I want to start it via SSH in GNU screen and detach then. The remote is a Fedora system using a Kerberos-based file server on which I'm not root. But after a day my renewable ticket expires so the program cannot write to the file server anymore. It seems that the ticket is not renewed automatically as it is when I'm a local user on that machine. The output of klist is attached below.How can I automatically renew my ticket during the one week period so the program can write to the file server after >1 day?      Ticket cache: KEYRING:persistent:20282:20282Default principal: user@hostValid starting       Expires              Service principal22.10.2016 11:10:19  23.10.2016 11:09:49  nfs/server@host        renew until 29.10.2016 11:09:50
Automatically renew kerberos tickets in GNU screen
gnu screen;kerberos