Your home is certainly overquota.
~# du -csh ~
The quota is 100M and it's reserved for configuration files.
Delete or move some file
It is possible that your server closes connections that are idle for too long.
You can update your PC configuration.
From Linux client:
$ echo "ServerAliveInterval 60" >> ~/.ssh/config
Go to Settings -> Configuration -> SSH. There is section titled SSH settings, check the option SSH keepalive.
- Load your connection session and in the Category pane, click Connection.
- Under Sending of null packets to keep session active, in the Seconds between keepalives, type 240 (4 min).
With this configuration, PuTTY sends a packet to the server every 240 seconds (4 minutes) to keep the connection alive.
- In the Category pane, click Session and Save