ssh_config

Host *
    StrictHostKeyChecking no
    LogLevel ERROR
    ConnectTimeout 6
    ServerAliveInterval 30
    ServerAliveCountMax 10
    ExitOnForwardFailure yes
Host github.com
    User git
    ProxyCommand nc %h %p
# Host cloud_vp?0* !cloud_vpn01 # Example pattern matching
#    ProxyCommand ssh -q cloud_user@cloud_vpn01 -W %h:%p
# ghoti https://unix.stackexchange.com/q/471262    
# ssh -o "ControlMaster=auto" -o "ControlPath=~/.ssh/cm_sockets/%r@%h:%p" -f [email protected] -L 2000:10.0.1.100:80 -N
# ssh -O check -o "ControlPath=~/.ssh/cm_sockets/%r@%h:%p" [email protected]
# ssh -O exit -o "ControlPath=~/.ssh/cm_sockets/%r@%h:%p" [email protected]
# Host cloud_server
#     Hostname 10.0.1.100
#     User ubuntu
#     ExitOnForwardFailure yes
#     LocalForward 12345 cloud_server:12345
#     RequestTTY no
#     TCPKeepAlive yes
#     Compression yes
#     ControlPath=~/.ssh/cm_sockets/%r@%h:%p # %r refers to the remote login name, %h refers to the target host name, and %p refers to the destination port.
#     ControlMaster auto
#     ControlPersist 8h