.\" $OpenBSD: sftp.1,v 1.47 2003/10/13 08:22:25 markus Exp $
.\"
.\" Copyright (c) 2001 Damien Miller.  All rights reserved.
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.Dd February 4, 2001
.Dt SFTP 1
.Os
.Sh NAME
.Nm sftp
.Nd secure file transfer program
.Sh SYNOPSIS
.Nm sftp
.Bk -words
.Op Fl 1Cv
.Op Fl B Ar buffer_size
.Op Fl b Ar batchfile
.Op Fl F Ar ssh_config
.Op Fl o Ar ssh_option
.Op Fl P Ar sftp_server_path
.Op Fl R Ar num_requests
.Op Fl S Ar program
.Op Fl s Ar subsystem | sftp_server
.Ar host
.Ek
.Nm sftp
.Oo Oo Ar user Ns @ Oc Ns
.Ar host Ns Oo : Ns Ar file Oo
.Ar file Oc Oc Oc
.Nm sftp
.Oo Oo Ar user Ns @ Oc Ns
.Ar host Ns Oo : Ns Ar dir Ns
.Oo Ar / Oc Oc Oc
.Nm sftp
.Fl b Ar batchfile
.Oo Ar user Ns @ Oc Ns Ar host
.Sh DESCRIPTION
.Nm
is an interactive file transfer program, similar to
.Xr ftp 1 ,
which performs all operations over an encrypted
.Xr ssh 1
transport.
It may also use many features of ssh, such as public key authentication and
compression.
.Nm
connects and logs into the specified
.Ar host ,
then enters an interactive command mode.
.Pp
The second usage format will retrieve files automatically if a non-interactive
authentication method is used; otherwise it will do so after
successful interactive authentication.
.Pp
The third usage format allows the sftp client to start in a remote directory.
.Pp
The final usage format allows for automated sessions using the
.Fl b
option.
In such cases, it is usually necessary to configure public key authentication
to obviate the need to enter a password at connection time (see
.Xr sshd 8
and
.Xr ssh-keygen 1
for details).
The options are as follows:
.Bl -tag -width Ds
.It Fl 1
Specify the use of protocol version 1.
.It Fl B Ar buffer_size
Specify the size of the buffer that
.Nm
uses when transferring files.
Larger buffers require fewer round trips at the cost of higher
memory consumption.
The default is 32768 bytes.
.It Fl b Ar batchfile
Batch mode reads a series of commands from an input
.Ar batchfile
instead of
.Em stdin .
Since it lacks user interaction it should be used in conjunction with
non-interactive authentication.
.Nm
will abort if any of the following
commands fail:
.Ic get , put , rename , ln ,
.Ic rm , mkdir , chdir , ls ,
.Ic lchdir , chmod , chown , chgrp , lpwd
and
.Ic lmkdir .
Termination on error can be suppressed on a command by command basis by
prefixing the command with a
.Sq Ic \-
character (for example,
.Ic -rm /tmp/blah* ) .
.It Fl C
Enables compression (via ssh's
.Fl C
flag).
.It Fl F Ar ssh_config
Specifies an alternative
per-user configuration file for
.Xr ssh 1 .
This option is directly passed to
.Xr ssh 1 .
.It Fl o Ar ssh_option
Can be used to pass options to
.Nm ssh
in the format used in
.Xr ssh_config 5 .
This is useful for specifying options
for which there is no separate
.Nm sftp
command-line flag.
For example, to specify an alternate port use:
.Ic sftp -oPort=24 .
For full details of the options listed below, and their possible values, see
.Xr ssh_config 5 .
.Pp
.Bl -tag -width Ds -offset indent -compact
.It AddressFamily
.It BatchMode
.It BindAddress
.It ChallengeResponseAuthentication
.It CheckHostIP
.It Cipher
.It Ciphers
.It Compression
.It CompressionLevel
.It ConnectionAttempts
.It ConnectionTimeout
.It GlobalKnownHostsFile
.It GSSAPIAuthentication
.It GSSAPIDelegateCredentials
.It Host
.It HostbasedAuthentication
.It HostKeyAlgorithms
.It HostKeyAlias
.It HostName
.It IdentityFile
.It KeepAlive
.It LogLevel
.It MACs
.It NoHostAuthenticationForLocalhost
.It NumberOfPasswordPrompts
.It PasswordAuthentication
.It Port
.It PreferredAuthentications
.It Protocol
.It ProxyCommand
.It PubkeyAuthentication
.It RhostsRSAAuthentication
.It RSAAuthentication
.It SmartcardDevice
.It StrictHostKeyChecking
.It UsePrivilegedPort
.It User
.It UserKnownHostsFile
.It VerifyHostKeyDNS
.El
.It Fl P Ar sftp_server_path
Connect directly to a local sftp server
(rather than via
.Xr ssh 1 )
This option may be useful in debugging the client and server.
.It Fl R Ar num_requests
Specify how many requests may be outstanding at any one time.
Increasing this may slightly improve file transfer speed
but will increase memory usage.
The default is 16 outstanding requests.
.It Fl S Ar program
Name of the
.Ar program
to use for the encrypted connection.
The program must understand
.Xr ssh 1
options.
.It Fl s Ar subsystem | sftp_server
Specifies the SSH2 subsystem or the path for an sftp server
on the remote host.
A path is useful for using
.Nm
over protocol version 1, or when the remote
.Xr sshd 8
does not have an sftp subsystem configured.
.It Fl v
Raise logging level.
This option is also passed to ssh.
.El
.Sh INTERACTIVE COMMANDS
Once in interactive mode,
.Nm
understands a set of commands similar to those of
.Xr ftp 1 .
Commands are case insensitive and pathnames may be enclosed in quotes if they
contain spaces.
.Bl -tag -width "lmdir path"
.It Ic bye
Quit
.Nm sftp .
.It Ic cd Ar path
Change remote directory to
.Ar path .
.It Ic chgrp Ar grp Ar path
Change group of file
.Ar path
to
.Ar grp .
.Ar grp
must be a numeric GID.
.It Ic chmod Ar mode Ar path
Change permissions of file
.Ar path
to
.Ar mode .
.It Ic chown Ar own Ar path
Change owner of file
.Ar path
to
.Ar own .
.Ar own
must be a numeric UID.
.It Ic exit
Quit
.Nm sftp .
.It Xo Ic get
.Op Ar flags
.Ar remote-path
.Op Ar local-path
.Xc
Retrieve the
.Ar remote-path
and store it on the local machine.
If the local
path name is not specified, it is given the same name it has on the
remote machine.
If the
.Fl P
flag is specified, then the file's full permission and access time are
copied too.
.It Ic help
Display help text.
.It Ic lcd Ar path
Change local directory to
.Ar path .
.It Ic lls Op Ar ls-options Op Ar path
Display local directory listing of either
.Ar path
or current directory if
.Ar path
is not specified.
.It Ic lmkdir Ar path
Create local directory specified by
.Ar path .
.It Ic ln Ar oldpath Ar newpath
Create a symbolic link from
.Ar oldpath
to
.Ar newpath .
.It Ic lpwd
Print local working directory.
.It Xo Ic ls
.Op Ar flags
.Op Ar path
.Xc
Display remote directory listing of either
.Ar path
or current directory if
.Ar path
is not specified.
If the
.Fl l
flag is specified, then display additional details including permissions
and ownership information.
.It Ic lumask Ar umask
Set local umask to
.Ar umask .
.It Ic mkdir Ar path
Create remote directory specified by
.Ar path .
.It Ic progress
Toggle display of progress meter.
.It Xo Ic put
.Op Ar flags
.Ar local-path
.Op Ar remote-path
.Xc
Upload
.Ar local-path
and store it on the remote machine.
If the remote path name is not specified, it is given the same name it has
on the local machine.
If the
.Fl P
flag is specified, then the file's full permission and access time are
copied too.
.It Ic pwd
Display remote working directory.
.It Ic quit
Quit
.Nm sftp .
.It Ic rename Ar oldpath Ar newpath
Rename remote file from
.Ar oldpath
to
.Ar newpath .
.It Ic rm Ar path
Delete remote file specified by
.Ar path .
.It Ic rmdir Ar path
Remove remote directory specified by
.Ar path .
.It Ic symlink Ar oldpath Ar newpath
Create a symbolic link from
.Ar oldpath
to
.Ar newpath .
.It Ic version
Display the
.Nm
protocol version.
.It Ic \&! Ar command
Execute
.Ar command
in local shell.
.It Ic \&!
Escape to local shell.
.It Ic \&?
Synonym for help.
.El
.Sh SEE ALSO
.Xr ftp 1 ,
.Xr scp 1 ,
.Xr ssh 1 ,
.Xr ssh-add 1 ,
.Xr ssh-keygen 1 ,
.Xr ssh_config 5 ,
.Xr sftp-server 8 ,
.Xr sshd 8
.Rs
.%A T. Ylonen
.%A S. Lehtinen
.%T "SSH File Transfer Protocol"
.%N draft-ietf-secsh-filexfer-00.txt
.%D January 2001
.%O work in progress material
.Re