TLS mutual/client auth

curl -k https://10.1.1.101 -v --cert ./cert.pem --key ./key.pem

NOTE: you need to specify the relative (./) or absolute paths to the pem files)

display information after a completed transfer

curl -w "dns_resolution: %{time_namelookup}, tcp_established: %{time_connect}\n" -o /dev/null -s "http://google.co.uk"