ssh (version 0.9.3)

ssh_connect: SSH Client

Description

Create an ssh session using ssh_connect(). The session can be used to execute commands, scp files or setup a tunnel.

Usage

ssh_connect(host, keyfile = NULL, passwd = askpass, verbose = FALSE)
ssh_session_info(session)
ssh_disconnect(session)
libssh_version()

Arguments

host

an ssh server string of the form [user@]hostname[:@port]. An ipv6 hostname should be wrapped in brackets like this: [2001:db8::1]:80.

keyfile

path to private key file. Must be in OpenSSH format (see details)

passwd

either a string or a callback function for password prompt

verbose

either TRUE/FALSE or a value between 0 and 4 indicating log level: 0: no logging, 1: only warnings, 2: protocol, 3: packets or 4: full stack trace.

session

ssh connection created with ssh_connect()

Details

The client first tries to authenticate using a private key, either from ssh-agent or /.ssh/id_rsa in the user home directory. If this fails it falls back on challenge-response (interactive) and password auth if allowed by the server. The passwd parameter can be used to provide a passphrase or a callback function to ask prompt the user for the passphrase when needed.

The session will automatically be disconnected when the session object is removed or when R exits but you can also use ssh_disconnect().

Windows users: the private key must be in OpenSSH PEM format. If you open it in a text editor the first line must be: -----BEGIN RSA PRIVATE KEY-----. To convert a Putty PKK key, open it in the PuttyGen utility and go to Conversions -> Export OpenSSH.

See Also

Other ssh: scp, ssh_credentials, ssh_exec, ssh_tunnel()

Examples

if (FALSE) {
session <- ssh_connect("dev.opencpu.org")
ssh_exec_wait(session, command = "whoami")
ssh_disconnect(session)
}