Install OpenSSH
Find and install OpenSSH directly in Cydia
Use OpenSSH
http://orinchen.github.io/blog/2014/01/15/install-and-use-openssh-on-ios/
Make sure the PC and iPhone are in the same network segment
Find the IP address of your iPhone
ssh [email protected]
password is alpine by default
Or you can use an integrated terminal such as XShell