ssh broken pipe

This is a common problem that can be caused by several factors, e.g. SSH config, network instability, client power-saving settings. Possible solutions are:

• Add the following settings to ~/.ssh/config on the client that keeps losing the connection: 
ForwardX11Timeout 596h
• Use a tool such as screen or tmux which allows you to detach from and re-attach to a terminal session on the target server.
• (MacOS only) Start your ssh session using caffeinate which will prevent your Mac from sleeping during the session, e.g: 
caffeinate -i /usr/bin/ssh