/usr/bin/dbclient: Warning: failed to identify current user. Trying anyway.
WARNING: Ignoring unknown option --
Dropbear SSH client v2026.94 https://matt.ucc.asn.au/dropbear/dropbear.html
Usage: /usr/bin/dbclient [options] [user@]host[/port][,[user@]host/port],...] [command]
-p <remoteport>
-l <username>
-t Allocate a pty
-T Don't allocate a pty
-N Don't run a remote command
-f Run in background after auth
-q quiet, don't show remote banner
-y Always accept remote host key if unknown
-y -y Don't perform any remote host key checking (caution)
-s Request a subsystem (use by external sftp)
-o option Set option in OpenSSH-like format ('-o help' to list options)
-i <identityfile> (multiple allowed, default ~/.ssh/id_dropbear)
-A Enable agent auth forwarding
-L <[listenaddress:]listenport:remotehost:remoteport> Local port forwarding
-g Allow remote hosts to connect to forwarded ports
-R <[listenaddress:]listenport:remotehost:remoteport> Remote port forwarding
-W <receive_window_buffer> (default 24576, larger may be faster, max 10MB)
-K <keepalive> (0 is never, default 0)
-I <idle_timeout> (0 is never, default 0)
-M <max_duration> (0 is off, default 0, in seconds)
-z disable QoS
-B <endhost:endport> Netcat-alike forwarding
-J <proxy_program> Use program pipe rather than TCP connection
-c <cipher list> Specify preferred ciphers ('-c help' to list options)
-m <MAC list> Specify preferred MACs for packet verification (or '-m help')
-b [bind_address][:bind_port]
-Q <algo> Print supported algorithms, or -Q help
-V Version
Options (27)
| Option | Description | Source |
|---|
-p remoteport | Connect to port on the remote host. | help + man |
-l username | Username. | help + man |
-t | Allocate a PTY. | help + man |
-T | Don't allocate a PTY. | help + man |
-N | Don't request a remote shell or run any commands. | help + man |
-f | Fork into the background after authentication. | help + man |
-q | quiet, don't show remote banner | help |
-y | Always accept hostkeys if they are unknown. | help + man |
-s | The specified command will be requested as a subsystem, used for sftp. | help + man |
-o option | Can be used to give options in the format used by OpenSSH config file. | help + man |
-i identityfile | (multiple allowed, default ~/.ssh/id_dropbear) | help + man |
-A | Forward agent connections to the remote host. | help + man |
-g | Allow non-local hosts to connect to forwarded ports. | help + man |
-K keepalive | Ensure that traffic is transmitted at a certain interval in seconds. | help + man |
-I idle_timeout | Disconnect the session if no traffic is transmitted or received for idle_timeout seconds. | help + man |
-M max_duration | (0 is off, default 0, in seconds) | help |
-z | By default Dropbear will send network traffic with the AF21 setting for QoS, letting network devices give it higher priority. | help + man |
-b address][:port | Bind to a specific local address when connecting to the remote host. | help + man |
-Q algo | <algo> Print supported algorithms, or -Q help | help + man |
-V | Print the version | help + man |
-L listenaddress]:listenport:host:port | Local port forwarding. (in the manual page but not in --help) | man |
-R listenaddress]:listenport:host:port | Remote port forwarding. (in the manual page but not in --help) | man |
-W windowsize | Specify the per-channel receive window buffer size. (in the manual page but not in --help) | man |
-J, -J proxy_command | Use the standard input/output of the program proxy_command rather than using a normal TCP connection. (in the manual page but not in --help) | man |
-B endhost:endport | “Netcat-alike” mode, where Dropbear will connect to the given host, then create a forwarded connection to endhost. (in the manual page but not in --help) | man |
-c cipherlist | Specify a comma separated list of ciphers to enable. (in the manual page but not in --help) | man |
-m MAClist | Specify a comma separated list of authentication MACs to enable. (in the manual page but not in --help) | man |
Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.