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ttyd.1
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ttyd.1
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.TH ttyd 1 "September 2016" ttyd "User Manual"
.SH NAME
.PP
ttyd \- Share your terminal over the web
.SH SYNOPSIS
.PP
\fBttyd\fP [options] <command> [<arguments...>]
.SH Description
.PP
ttyd is a command\-line tool for sharing terminal over the web that runs in *nix and windows systems, with the following features:
.IP \(bu 2
Built on top of Libwebsockets with C for speed
.IP \(bu 2
Fully\-featured terminal based on Xterm.js with CJK (Chinese, Japanese, Korean) and IME support
.IP \(bu 2
Graphical ZMODEM integration with lrzsz support
.IP \(bu 2
SSL support based on OpenSSL
.IP \(bu 2
Run any custom command with options
.IP \(bu 2
Basic authentication support and many other custom options
.IP \(bu 2
Cross platform: macOS, Linux, FreeBSD/OpenBSD, OpenWrt/LEDE, Windows
.SH OPTIONS
.PP
\-p, \-\-port <port>
Port to listen (default: 7681, use \fB\fC0\fR for random port)
.PP
\-i, \-\-interface <interface>
Network interface to bind (eg: eth0), or UNIX domain socket path (eg: /var/run/ttyd.sock)
.PP
\-c, \-\-credential USER[:PASSWORD]
Credential for Basic Authentication (format: username:password)
.PP
\-u, \-\-uid <uid>
User id to run with
.PP
\-g, \-\-gid <gid>
Group id to run with
.PP
\-s, \-\-signal <signal string>
Signal to send to the command when exit it (default: 1, SIGHUP)
.PP
\-r, \-\-reconnect <seconds>
Time to reconnect for the client in seconds (default: 10)
.PP
\-R, \-\-readonly
Do not allow clients to write to the TTY
.PP
\-t, \-\-client\-option <key=value>
Send option to client (format: key=value), repeat to add more options
.PP
\-O, \-\-check\-origin
Do not allow websocket connection from different origin
.PP
\-m, \-\-max\-clients
Maximum clients to support (default: 0, no limit)
.PP
\-o, \-\-once
Accept only one client and exit on disconnection
.PP
\-B, \-\-browser
Open terminal with the default system browser
.PP
\-I, \-\-index <index file>
Custom index.html path
.PP
\-S, \-\-ssl
Enable SSL
.PP
\-C, \-\-ssl\-cert <cert path>
SSL certificate file path
.PP
\-K, \-\-ssl\-key <key path>
SSL key file path
.PP
\-A, \-\-ssl\-ca <ca path>
SSL CA file path for client certificate verification
.PP
\-d, \-\-debug <level>
Set log level (default: 7)
.PP
\-v, \-\-version
Print the version and exit
.PP
\-h, \-\-help
Print this text and exit
.SH Examples
.PP
ttyd starts web server at port 7681 by default, you can use the \-p option to change it, the command will be started with arguments as options. For example, run:
.PP
.RS
.nf
ttyd \-p 8080 bash \-x
.fi
.RE
.PP
Then open
\[la]http://localhost:8080\[ra] with a browser, you will get a bash shell with debug mode enabled. More examples:
.IP \(bu 2
If you want to login with your system accounts on the web browser, run \fB\fCttyd login\fR\&.
.IP \(bu 2
You can even run a none shell command like vim, try: \fB\fCttyd vim\fR, the web browser will show you a vim editor.
.IP \(bu 2
Sharing single process with multiple clients: \fB\fCttyd tmux new \-A \-s ttyd vim\fR, run \fB\fCtmux new \-A \-s ttyd\fR to connect to the tmux session from terminal.
.SH SSL how\-to
.PP
Generate SSL CA and self signed server/client certificates:
.PP
.RS
.nf
# CA certificate (FQDN must be different from server/client)
openssl genrsa \-out ca.key 2048
openssl req \-new \-x509 \-days 365 \-key ca.key \-subj "/C=CN/ST=GD/L=SZ/O=Acme, Inc./CN=Acme Root CA" \-out ca.crt
# server certificate (for multiple domains, change subjectAltName to: DNS:example.com,DNS:www.example.com)
openssl req \-newkey rsa:2048 \-nodes \-keyout server.key \-subj "/C=CN/ST=GD/L=SZ/O=Acme, Inc./CN=localhost" \-out server.csr
openssl x509 \-req \-extfile <(printf "subjectAltName=DNS:localhost") \-days 365 \-in server.csr \-CA ca.crt \-CAkey ca.key \-CAcreateserial \-out server.crt
# client certificate (the p12/pem format may be useful for some clients)
openssl req \-newkey rsa:2048 \-nodes \-keyout client.key \-subj "/C=CN/ST=GD/L=SZ/O=Acme, Inc./CN=client" \-out client.csr
openssl x509 \-req \-days 365 \-in client.csr \-CA ca.crt \-CAkey ca.key \-CAcreateserial \-out client.crt
openssl pkcs12 \-export \-clcerts \-in client.crt \-inkey client.key \-out client.p12
openssl pkcs12 \-in client.p12 \-out client.pem \-clcerts
.fi
.RE
.PP
Then start ttyd:
.PP
.RS
.nf
ttyd \-\-ssl \-\-ssl\-cert server.crt \-\-ssl\-key server.key \-\-ssl\-ca ca.crt bash
.fi
.RE
.PP
You may want to test the client certificate verification with \fIcurl\fP(1):
.PP
.RS
.nf
curl \-\-insecure \-\-cert client.p12[:password] \-v https://localhost:7681
.fi
.RE
.PP
If you don't want to enable client certificate verification, remove the \fB\fC\-\-ssl\-ca\fR option.
.SH Docker and ttyd
.PP
Docker containers are jailed environments which are more secure, this is useful for protecting the host system, you may use ttyd with docker like this:
.IP \(bu 2
Sharing single docker container with multiple clients: docker run \-it \-\-rm \-p 7681:7681 tsl0922/ttyd.
.IP \(bu 2
Creating new docker container for each client: ttyd docker run \-it \-\-rm ubuntu.
.SH AUTHOR
.PP
Shuanglei Tao <tsl0922@gmail.com> Visit
\[la]https://github.com/tsl0922/ttyd\[ra] to get more information and report bugs.