E.g.: Host router7 ProxyCommand /bin/sh -c 'breakglass -prepare_only -ssh_config=/dev/null -debug_tarball_pattern=$HOME/gokrazy/debug-\${GOARCH}.tar %h; /usr/bin/nc %h %p'
E.g.: Host router7 ProxyCommand /bin/sh -c 'breakglass -prepare_only -ssh_config=/dev/null -debug_tarball_pattern=$HOME/gokrazy/debug-\${GOARCH}.tar %h; /usr/bin/nc %h %p'