If you want securely control your Linux server from the Apple iPhone, there is a piece of software called TouchTerm that is an SSH client basically and terminal emulator for the Apple iPhone.

There is a direct port of the OpenSSL and OpenSSH software to the iPhone and it provides RSA/DSA key-based authentication and public key distribution through email.

There is also an emulator for a VT100 terminal that provides you a standard command line interface and enables curses-based programs like Vi and Top to be used.

Read the rest of this entry