手机已通过Cydia安装了Openssh，WiFi连的是同一个。
$ ssh -v root@192.168.1.100
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: Connecting to 192.168.1.100 [192.168.1.100] port 22.
debug1: Connection established.
debug1: identity file /Users/zhangyu/.ssh/id_rsa type -1
debug1: identity file /Users/zhangyu/.ssh/id_rsa-cert type -1
debug1: identity file /Users/zhangyu/.ssh/id_dsa type -1
debug1: identity file /Users/zhangyu/.ssh/id_dsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
ssh_exchange_identification: Connection closed by remote host