nyancat =^.^=

Animated nyancat served over SSH and Telnet, or played locally in your terminal. meow~

The SSH transport is built on russh, so all traffic is properly encrypted. Connections are display-only: anyone may connect, but the server never spawns a shell and refuses exec/subsystem requests, so there is no command execution or terminal to escape into.

Usage

cargo run                 # SSH on 0.0.0.0:2222, Telnet on 0.0.0.0:2323
cargo run -- --raw        # play locally in this terminal (no servers)

Then connect:

ssh localhost -p 2222     # press q or Ctrl+C to quit
telnet localhost 2323

Options

Flag	Default	Description
--ssh [HOST:]PORT	0.0.0.0:2222	SSH listen address. Bare port or host:port.
--telnet [HOST:]PORT	0.0.0.0:2323	Telnet listen address. Bare port or host:port.
--raw	off	Play the animation in this terminal; do not start the servers.
--host-key PATH	nyancat_host_key	SSH host key file. Created (ed25519) on first run and reused.

cargo run -- --ssh 9000 --telnet 127.0.0.1:4000 --host-key /etc/nyancat/host_key

Layout

• art — frame data and the character → ANSI color map.
• render — the shared, stateless Animation renderer.
• ssh / telnet — the two network transports.
• local — --raw terminal playback.
• cli — argument parsing.

Credits

This is a Rust rewrite that merges klange/nyancat (the terminal classic) and aymanbagabas/nyancatsh (nyancat over SSH) into a single binary.