sftp.1 - platform/external/openssh - Gitiles

 .\" $OpenBSD: sftp.1,v 1.126 2019/06/12 11:31:50 jmc Exp $
 .\"
 .\" Copyright (c) 2001 Damien Miller.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .Dd $Mdocdate: June 12 2019 $
 .Dt SFTP 1
 .Os
 .Sh NAME
 .Nm sftp
 .Nd secure file transfer program
 .Sh SYNOPSIS
 .Nm sftp
 .Op Fl 46aCfpqrv
 .Op Fl B Ar buffer_size
 .Op Fl b Ar batchfile
 .Op Fl c Ar cipher
 .Op Fl D Ar sftp_server_path
 .Op Fl F Ar ssh_config
 .Op Fl i Ar identity_file
 .Op Fl J Ar destination
 .Op Fl l Ar limit
 .Op Fl o Ar ssh_option
 .Op Fl P Ar port
 .Op Fl R Ar num_requests
 .Op Fl S Ar program
 .Op Fl s Ar subsystem | sftp_server
 .Ar destination
 .Sh DESCRIPTION
 .Nm
 is a 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.
 .Pp
 The
 .Ar destination
 may be specified either as
 .Sm off
 .Oo user @ Oc host Op : path
 .Sm on
 or as a URI in the form
 .Sm off
 .No sftp:// Oo user @ Oc host Oo : port Oc Op / path .
 .Sm on
 .Pp
 If the
 .Ar destination
 includes a
 .Ar path
 and it is not a directory,
 .Nm
 will retrieve files automatically if a non-interactive
 authentication method is used; otherwise it will do so after
 successful interactive authentication.
 .Pp
 If no
 .Ar path
 is specified, or if the
 .Ar path
 is a directory,
 .Nm
 will log in to the specified
 .Ar host
 and enter interactive command mode, changing to the remote directory
 if one was specified.
 An optional trailing slash can be used to force the
 .Ar path
 to be interpreted as a directory.
 .Pp
 Since the destination formats use colon characters to delimit host
 names from path names or port numbers, IPv6 addresses must be
 enclosed in square brackets to avoid ambiguity.
 .Pp
 The options are as follows:
 .Bl -tag -width Ds
 .It Fl 4
 Forces
 .Nm
 to use IPv4 addresses only.
 .It Fl 6
 Forces
 .Nm
 to use IPv6 addresses only.
 .It Fl a
 Attempt to continue interrupted transfers rather than overwriting
 existing partial or complete copies of files.
 If the partial contents differ from those being transferred,
 then the resultant file is likely to be corrupt.
 .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 to obviate the need to enter a password
 at connection time (see
 .Xr sshd 8
 and
 .Xr ssh-keygen 1
 for details).
 .Pp
 A
 .Ar batchfile
 of
 .Sq \-
 may be used to indicate standard input.
 .Nm
 will abort if any of the following
 commands fail:
 .Ic get , put , reget , reput , rename , ln ,
 .Ic rm , mkdir , chdir , ls ,
 .Ic lchdir , chmod , chown ,
 .Ic chgrp , lpwd , df , symlink ,
 and
 .Ic lmkdir .
 .Pp
 Termination on error can be suppressed on a command by command basis by
 prefixing the command with a
 .Sq \-
 character (for example,
 .Ic -rm /tmp/blah* ) .
 Echo of the command may be suppressed by prefixing the command with a
 .Sq @
 character.
 These two prefixes may be combined in any order, for example
 .Ic -@ls /bsd .
 .It Fl C
 Enables compression (via ssh's
 .Fl C
 flag).
 .It Fl c Ar cipher
 Selects the cipher to use for encrypting the data transfers.
 This option is directly passed to
 .Xr ssh 1 .
 .It Fl D 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 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 f
 Requests that files be flushed to disk immediately after transfer.
 When uploading files, this feature is only enabled if the server
 implements the "fsync@openssh.com" extension.
 .It Fl i Ar identity_file
 Selects the file from which the identity (private key) for public key
 authentication is read.
 This option is directly passed to
 .Xr ssh 1 .
 .It Fl J Ar destination
 Connect to the target host by first making an
 .Nm
 connection to the jump host described by
 .Ar destination
 and then establishing a TCP forwarding to the ultimate destination from
 there.
 Multiple jump hops may be specified separated by comma characters.
 This is a shortcut to specify a
 .Cm ProxyJump
 configuration directive.
 This option is directly passed to
 .Xr ssh 1 .
 .It Fl l Ar limit
 Limits the used bandwidth, specified in Kbit/s.
 .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 BindInterface
 .It CanonicalDomains
 .It CanonicalizeFallbackLocal
 .It CanonicalizeHostname
 .It CanonicalizeMaxDots
 .It CanonicalizePermittedCNAMEs
 .It CASignatureAlgorithms
 .It CertificateFile
 .It ChallengeResponseAuthentication
 .It CheckHostIP
 .It Ciphers
 .It Compression
 .It ConnectionAttempts
 .It ConnectTimeout
 .It ControlMaster
 .It ControlPath
 .It ControlPersist
 .It GlobalKnownHostsFile
 .It GSSAPIAuthentication
 .It GSSAPIDelegateCredentials
 .It HashKnownHosts
 .It Host
 .It HostbasedAuthentication
 .It HostbasedKeyTypes
 .It HostKeyAlgorithms
 .It HostKeyAlias
 .It Hostname
 .It IdentitiesOnly
 .It IdentityAgent
 .It IdentityFile
 .It IPQoS
 .It KbdInteractiveAuthentication
 .It KbdInteractiveDevices
 .It KexAlgorithms
 .It LogLevel
 .It MACs
 .It NoHostAuthenticationForLocalhost
 .It NumberOfPasswordPrompts
 .It PasswordAuthentication
 .It PKCS11Provider
 .It Port
 .It PreferredAuthentications
 .It ProxyCommand
 .It ProxyJump
 .It PubkeyAcceptedKeyTypes
 .It PubkeyAuthentication
 .It RekeyLimit
 .It SendEnv
 .It ServerAliveInterval
 .It ServerAliveCountMax
 .It SetEnv
 .It StrictHostKeyChecking
 .It TCPKeepAlive
 .It UpdateHostKeys
 .It User
 .It UserKnownHostsFile
 .It VerifyHostKeyDNS
 .El
 .It Fl P Ar port
 Specifies the port to connect to on the remote host.
 .It Fl p
 Preserves modification times, access times, and modes from the
 original files transferred.
 .It Fl q
 Quiet mode: disables the progress meter as well as warning and
 diagnostic messages from
 .Xr ssh 1 .
 .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 64 outstanding requests.
 .It Fl r
 Recursively copy entire directories when uploading and downloading.
 Note that
 .Nm
 does not follow symbolic links encountered in the tree traversal.
 .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 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.
 Pathnames that contain spaces must be enclosed in quotes.
 Any special characters contained within pathnames that are recognized by
 .Xr glob 3
 must be escaped with backslashes
 .Pq Sq \e .
 .Bl -tag -width Ds
 .It Ic bye
 Quit
 .Nm sftp .
 .It Ic cd Op Ar path
 Change remote directory to
 .Ar path .
 If
 .Ar path
 is not specified, then change directory to the one the session started in.
 .It Xo Ic chgrp
 .Op Fl h
 .Ar grp
 .Ar path
 .Xc
 Change group of file
 .Ar path
 to
 .Ar grp .
 If the
 .Fl h
 flag is specified, then symlinks will not be followed.
 .Ar path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 .Ar grp
 must be a numeric GID.
 .It Xo Ic chmod
 .Op Fl h
 .Ar mode
 .Ar path
 .Xc
 Change permissions of file
 .Ar path
 to
 .Ar mode .
 If the
 .Fl h
 flag is specified, then symlinks will not be followed.
 .Ar path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 .It Xo Ic chown
 .Op Fl h
 .Ar own
 .Ar path
 .Xc
 Change owner of file
 .Ar path
 to
 .Ar own .
 If the
 .Fl h
 flag is specified, then symlinks will not be followed.
 .Ar path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 .Ar own
 must be a numeric UID.
 .It Xo Ic df
 .Op Fl hi
 .Op Ar path
 .Xc
 Display usage information for the filesystem holding the current directory
 (or
 .Ar path
 if specified).
 If the
 .Fl h
 flag is specified, the capacity information will be displayed using
 "human-readable" suffixes.
 The
 .Fl i
 flag requests display of inode information in addition to capacity information.
 This command is only supported on servers that implement the
 .Dq statvfs@openssh.com
 extension.
 .It Ic exit
 Quit
 .Nm sftp .
 .It Xo Ic get
 .Op Fl afPpr
 .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.
 .Ar remote-path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 If it does and
 .Ar local-path
 is specified, then
 .Ar local-path
 must specify a directory.
 .Pp
 If the
 .Fl a
 flag is specified, then attempt to resume partial transfers of existing files.
 Note that resumption assumes that any partial copy of the local file matches
 the remote copy.
 If the remote file contents differ from the partial local copy then the
 resultant file is likely to be corrupt.
 .Pp
 If the
 .Fl f
 flag is specified, then
 .Xr fsync 2
 will be called after the file transfer has completed to flush the file
 to disk.
 .Pp
 If either the
 .Fl P
 or
 .Fl p
 flag is specified, then full file permissions and access times are
 copied too.
 .Pp
 If the
 .Fl r
 flag is specified then directories will be copied recursively.
 Note that
 .Nm
 does not follow symbolic links when performing recursive transfers.
 .It Ic help
 Display help text.
 .It Ic lcd Op Ar path
 Change local directory to
 .Ar path .
 If
 .Ar path
 is not specified, then change directory to the local user's home directory.
 .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.
 .Ar ls-options
 may contain any flags supported by the local system's
 .Xr ls 1
 command.
 .Ar path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 .It Ic lmkdir Ar path
 Create local directory specified by
 .Ar path .
 .It Xo Ic ln
 .Op Fl s
 .Ar oldpath
 .Ar newpath
 .Xc
 Create a link from
 .Ar oldpath
 to
 .Ar newpath .
 If the
 .Fl s
 flag is specified the created link is a symbolic link, otherwise it is
 a hard link.
 .It Ic lpwd
 Print local working directory.
 .It Xo Ic ls
 .Op Fl 1afhlnrSt
 .Op Ar path
 .Xc
 Display a remote directory listing of either
 .Ar path
 or the current directory if
 .Ar path
 is not specified.
 .Ar path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 .Pp
 The following flags are recognized and alter the behaviour of
 .Ic ls
 accordingly:
 .Bl -tag -width Ds
 .It Fl 1
 Produce single columnar output.
 .It Fl a
 List files beginning with a dot
 .Pq Sq \&. .
 .It Fl f
 Do not sort the listing.
 The default sort order is lexicographical.
 .It Fl h
 When used with a long format option, use unit suffixes: Byte, Kilobyte,
 Megabyte, Gigabyte, Terabyte, Petabyte, and Exabyte in order to reduce
 the number of digits to four or fewer using powers of 2 for sizes (K=1024,
 M=1048576, etc.).
 .It Fl l
 Display additional details including permissions
 and ownership information.
 .It Fl n
 Produce a long listing with user and group information presented
 numerically.
 .It Fl r
 Reverse the sort order of the listing.
 .It Fl S
 Sort the listing by file size.
 .It Fl t
 Sort the listing by last modification time.
 .El
 .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 Fl afPpr
 .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.
 .Ar local-path
 may contain
 .Xr glob 7
 characters and may match multiple files.
 If it does and
 .Ar remote-path
 is specified, then
 .Ar remote-path
 must specify a directory.
 .Pp
 If the
 .Fl a
 flag is specified, then attempt to resume partial
 transfers of existing files.
 Note that resumption assumes that any partial copy of the remote file
 matches the local copy.
 If the local file contents differ from the remote local copy then
 the resultant file is likely to be corrupt.
 .Pp
 If the
 .Fl f
 flag is specified, then a request will be sent to the server to call
 .Xr fsync 2
 after the file has been transferred.
 Note that this is only supported by servers that implement
 the "fsync@openssh.com" extension.
 .Pp
 If either the
 .Fl P
 or
 .Fl p
 flag is specified, then full file permissions and access times are
 copied too.
 .Pp
 If the
 .Fl r
 flag is specified then directories will be copied recursively.
 Note that
 .Nm
 does not follow symbolic links when performing recursive transfers.
 .It Ic pwd
 Display remote working directory.
 .It Ic quit
 Quit
 .Nm sftp .
 .It Xo Ic reget
 .Op Fl Ppr
 .Ar remote-path
 .Op Ar local-path
 .Xc
 Resume download of
 .Ar remote-path .
 Equivalent to
 .Ic get
 with the
 .Fl a
 flag set.
 .It Xo Ic reput
 .Op Fl Ppr
 .Op Ar local-path
 .Ar remote-path
 .Xc
 Resume upload of
 .Op Ar local-path .
 Equivalent to
 .Ic put
 with the
 .Fl a
 flag set.
 .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 \&! Ns 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 ls 1 ,
 .Xr scp 1 ,
 .Xr ssh 1 ,
 .Xr ssh-add 1 ,
 .Xr ssh-keygen 1 ,
 .Xr ssh_config 5 ,
 .Xr glob 7 ,
 .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
	.\" $OpenBSD: sftp.1,v 1.126 2019/06/12 11:31:50 jmc Exp $
	.\"
	.\" Copyright (c) 2001 Damien Miller. All rights reserved.
	.\"
	.\" Redistribution and use in source and binary forms, with or without
	.\" modification, are permitted provided that the following conditions
	.\" are met:
	.\" 1. Redistributions of source code must retain the above copyright
	.\" notice, this list of conditions and the following disclaimer.
	.\" 2. Redistributions in binary form must reproduce the above copyright
	.\" notice, this list of conditions and the following disclaimer in the
	.\" documentation and/or other materials provided with the distribution.
	.\"
	.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	.\"
	.Dd $Mdocdate: June 12 2019 $
	.Dt SFTP 1
	.Os
	.Sh NAME
	.Nm sftp
	.Nd secure file transfer program
	.Sh SYNOPSIS
	.Nm sftp
	.Op Fl 46aCfpqrv
	.Op Fl B Ar buffer_size
	.Op Fl b Ar batchfile
	.Op Fl c Ar cipher
	.Op Fl D Ar sftp_server_path
	.Op Fl F Ar ssh_config
	.Op Fl i Ar identity_file
	.Op Fl J Ar destination
	.Op Fl l Ar limit
	.Op Fl o Ar ssh_option
	.Op Fl P Ar port
	.Op Fl R Ar num_requests
	.Op Fl S Ar program
	.Op Fl s Ar subsystem \| sftp_server
	.Ar destination
	.Sh DESCRIPTION
	.Nm
	is a 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.
	.Pp
	The
	.Ar destination
	may be specified either as
	.Sm off
	.Oo user @ Oc host Op : path
	.Sm on
	or as a URI in the form
	.Sm off
	.No sftp:// Oo user @ Oc host Oo : port Oc Op / path .
	.Sm on
	.Pp
	If the
	.Ar destination
	includes a
	.Ar path
	and it is not a directory,
	.Nm
	will retrieve files automatically if a non-interactive
	authentication method is used; otherwise it will do so after
	successful interactive authentication.
	.Pp
	If no
	.Ar path
	is specified, or if the
	.Ar path
	is a directory,
	.Nm
	will log in to the specified
	.Ar host
	and enter interactive command mode, changing to the remote directory
	if one was specified.
	An optional trailing slash can be used to force the
	.Ar path
	to be interpreted as a directory.
	.Pp
	Since the destination formats use colon characters to delimit host
	names from path names or port numbers, IPv6 addresses must be
	enclosed in square brackets to avoid ambiguity.
	.Pp
	The options are as follows:
	.Bl -tag -width Ds
	.It Fl 4
	Forces
	.Nm
	to use IPv4 addresses only.
	.It Fl 6
	Forces
	.Nm
	to use IPv6 addresses only.
	.It Fl a
	Attempt to continue interrupted transfers rather than overwriting
	existing partial or complete copies of files.
	If the partial contents differ from those being transferred,
	then the resultant file is likely to be corrupt.
	.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 to obviate the need to enter a password
	at connection time (see
	.Xr sshd 8
	and
	.Xr ssh-keygen 1
	for details).
	.Pp
	A
	.Ar batchfile
	of
	.Sq \-
	may be used to indicate standard input.
	.Nm
	will abort if any of the following
	commands fail:
	.Ic get , put , reget , reput , rename , ln ,
	.Ic rm , mkdir , chdir , ls ,
	.Ic lchdir , chmod , chown ,
	.Ic chgrp , lpwd , df , symlink ,
	and
	.Ic lmkdir .
	.Pp
	Termination on error can be suppressed on a command by command basis by
	prefixing the command with a
	.Sq \-
	character (for example,
	.Ic -rm /tmp/blah* ) .
	Echo of the command may be suppressed by prefixing the command with a
	.Sq @
	character.
	These two prefixes may be combined in any order, for example
	.Ic -@ls /bsd .
	.It Fl C
	Enables compression (via ssh's
	.Fl C
	flag).
	.It Fl c Ar cipher
	Selects the cipher to use for encrypting the data transfers.
	This option is directly passed to
	.Xr ssh 1 .
	.It Fl D 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 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 f
	Requests that files be flushed to disk immediately after transfer.
	When uploading files, this feature is only enabled if the server
	implements the "fsync@openssh.com" extension.
	.It Fl i Ar identity_file
	Selects the file from which the identity (private key) for public key
	authentication is read.
	This option is directly passed to
	.Xr ssh 1 .
	.It Fl J Ar destination
	Connect to the target host by first making an
	.Nm
	connection to the jump host described by
	.Ar destination
	and then establishing a TCP forwarding to the ultimate destination from
	there.
	Multiple jump hops may be specified separated by comma characters.
	This is a shortcut to specify a
	.Cm ProxyJump
	configuration directive.
	This option is directly passed to
	.Xr ssh 1 .
	.It Fl l Ar limit
	Limits the used bandwidth, specified in Kbit/s.
	.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 BindInterface
	.It CanonicalDomains
	.It CanonicalizeFallbackLocal
	.It CanonicalizeHostname
	.It CanonicalizeMaxDots
	.It CanonicalizePermittedCNAMEs
	.It CASignatureAlgorithms
	.It CertificateFile
	.It ChallengeResponseAuthentication
	.It CheckHostIP
	.It Ciphers
	.It Compression
	.It ConnectionAttempts
	.It ConnectTimeout
	.It ControlMaster
	.It ControlPath
	.It ControlPersist
	.It GlobalKnownHostsFile
	.It GSSAPIAuthentication
	.It GSSAPIDelegateCredentials
	.It HashKnownHosts
	.It Host
	.It HostbasedAuthentication
	.It HostbasedKeyTypes
	.It HostKeyAlgorithms
	.It HostKeyAlias
	.It Hostname
	.It IdentitiesOnly
	.It IdentityAgent
	.It IdentityFile
	.It IPQoS
	.It KbdInteractiveAuthentication
	.It KbdInteractiveDevices
	.It KexAlgorithms
	.It LogLevel
	.It MACs
	.It NoHostAuthenticationForLocalhost
	.It NumberOfPasswordPrompts
	.It PasswordAuthentication
	.It PKCS11Provider
	.It Port
	.It PreferredAuthentications
	.It ProxyCommand
	.It ProxyJump
	.It PubkeyAcceptedKeyTypes
	.It PubkeyAuthentication
	.It RekeyLimit
	.It SendEnv
	.It ServerAliveInterval
	.It ServerAliveCountMax
	.It SetEnv
	.It StrictHostKeyChecking
	.It TCPKeepAlive
	.It UpdateHostKeys
	.It User
	.It UserKnownHostsFile
	.It VerifyHostKeyDNS
	.El
	.It Fl P Ar port
	Specifies the port to connect to on the remote host.
	.It Fl p
	Preserves modification times, access times, and modes from the
	original files transferred.
	.It Fl q
	Quiet mode: disables the progress meter as well as warning and
	diagnostic messages from
	.Xr ssh 1 .
	.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 64 outstanding requests.
	.It Fl r
	Recursively copy entire directories when uploading and downloading.
	Note that
	.Nm
	does not follow symbolic links encountered in the tree traversal.
	.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 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.
	Pathnames that contain spaces must be enclosed in quotes.
	Any special characters contained within pathnames that are recognized by
	.Xr glob 3
	must be escaped with backslashes
	.Pq Sq \e .
	.Bl -tag -width Ds
	.It Ic bye
	Quit
	.Nm sftp .
	.It Ic cd Op Ar path
	Change remote directory to
	.Ar path .
	If
	.Ar path
	is not specified, then change directory to the one the session started in.
	.It Xo Ic chgrp
	.Op Fl h
	.Ar grp
	.Ar path
	.Xc
	Change group of file
	.Ar path
	to
	.Ar grp .
	If the
	.Fl h
	flag is specified, then symlinks will not be followed.
	.Ar path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	.Ar grp
	must be a numeric GID.
	.It Xo Ic chmod
	.Op Fl h
	.Ar mode
	.Ar path
	.Xc
	Change permissions of file
	.Ar path
	to
	.Ar mode .
	If the
	.Fl h
	flag is specified, then symlinks will not be followed.
	.Ar path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	.It Xo Ic chown
	.Op Fl h
	.Ar own
	.Ar path
	.Xc
	Change owner of file
	.Ar path
	to
	.Ar own .
	If the
	.Fl h
	flag is specified, then symlinks will not be followed.
	.Ar path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	.Ar own
	must be a numeric UID.
	.It Xo Ic df
	.Op Fl hi
	.Op Ar path
	.Xc
	Display usage information for the filesystem holding the current directory
	(or
	.Ar path
	if specified).
	If the
	.Fl h
	flag is specified, the capacity information will be displayed using
	"human-readable" suffixes.
	The
	.Fl i
	flag requests display of inode information in addition to capacity information.
	This command is only supported on servers that implement the
	.Dq statvfs@openssh.com
	extension.
	.It Ic exit
	Quit
	.Nm sftp .
	.It Xo Ic get
	.Op Fl afPpr
	.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.
	.Ar remote-path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	If it does and
	.Ar local-path
	is specified, then
	.Ar local-path
	must specify a directory.
	.Pp
	If the
	.Fl a
	flag is specified, then attempt to resume partial transfers of existing files.
	Note that resumption assumes that any partial copy of the local file matches
	the remote copy.
	If the remote file contents differ from the partial local copy then the
	resultant file is likely to be corrupt.
	.Pp
	If the
	.Fl f
	flag is specified, then
	.Xr fsync 2
	will be called after the file transfer has completed to flush the file
	to disk.
	.Pp
	If either the
	.Fl P
	or
	.Fl p
	flag is specified, then full file permissions and access times are
	copied too.
	.Pp
	If the
	.Fl r
	flag is specified then directories will be copied recursively.
	Note that
	.Nm
	does not follow symbolic links when performing recursive transfers.
	.It Ic help
	Display help text.
	.It Ic lcd Op Ar path
	Change local directory to
	.Ar path .
	If
	.Ar path
	is not specified, then change directory to the local user's home directory.
	.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.
	.Ar ls-options
	may contain any flags supported by the local system's
	.Xr ls 1
	command.
	.Ar path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	.It Ic lmkdir Ar path
	Create local directory specified by
	.Ar path .
	.It Xo Ic ln
	.Op Fl s
	.Ar oldpath
	.Ar newpath
	.Xc
	Create a link from
	.Ar oldpath
	to
	.Ar newpath .
	If the
	.Fl s
	flag is specified the created link is a symbolic link, otherwise it is
	a hard link.
	.It Ic lpwd
	Print local working directory.
	.It Xo Ic ls
	.Op Fl 1afhlnrSt
	.Op Ar path
	.Xc
	Display a remote directory listing of either
	.Ar path
	or the current directory if
	.Ar path
	is not specified.
	.Ar path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	.Pp
	The following flags are recognized and alter the behaviour of
	.Ic ls
	accordingly:
	.Bl -tag -width Ds
	.It Fl 1
	Produce single columnar output.
	.It Fl a
	List files beginning with a dot
	.Pq Sq \&. .
	.It Fl f
	Do not sort the listing.
	The default sort order is lexicographical.
	.It Fl h
	When used with a long format option, use unit suffixes: Byte, Kilobyte,
	Megabyte, Gigabyte, Terabyte, Petabyte, and Exabyte in order to reduce
	the number of digits to four or fewer using powers of 2 for sizes (K=1024,
	M=1048576, etc.).
	.It Fl l
	Display additional details including permissions
	and ownership information.
	.It Fl n
	Produce a long listing with user and group information presented
	numerically.
	.It Fl r
	Reverse the sort order of the listing.
	.It Fl S
	Sort the listing by file size.
	.It Fl t
	Sort the listing by last modification time.
	.El
	.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 Fl afPpr
	.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.
	.Ar local-path
	may contain
	.Xr glob 7
	characters and may match multiple files.
	If it does and
	.Ar remote-path
	is specified, then
	.Ar remote-path
	must specify a directory.
	.Pp
	If the
	.Fl a
	flag is specified, then attempt to resume partial
	transfers of existing files.
	Note that resumption assumes that any partial copy of the remote file
	matches the local copy.
	If the local file contents differ from the remote local copy then
	the resultant file is likely to be corrupt.
	.Pp
	If the
	.Fl f
	flag is specified, then a request will be sent to the server to call
	.Xr fsync 2
	after the file has been transferred.
	Note that this is only supported by servers that implement
	the "fsync@openssh.com" extension.
	.Pp
	If either the
	.Fl P
	or
	.Fl p
	flag is specified, then full file permissions and access times are
	copied too.
	.Pp
	If the
	.Fl r
	flag is specified then directories will be copied recursively.
	Note that
	.Nm
	does not follow symbolic links when performing recursive transfers.
	.It Ic pwd
	Display remote working directory.
	.It Ic quit
	Quit
	.Nm sftp .
	.It Xo Ic reget
	.Op Fl Ppr
	.Ar remote-path
	.Op Ar local-path
	.Xc
	Resume download of
	.Ar remote-path .
	Equivalent to
	.Ic get
	with the
	.Fl a
	flag set.
	.It Xo Ic reput
	.Op Fl Ppr
	.Op Ar local-path
	.Ar remote-path
	.Xc
	Resume upload of
	.Op Ar local-path .
	Equivalent to
	.Ic put
	with the
	.Fl a
	flag set.
	.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 \&! Ns 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 ls 1 ,
	.Xr scp 1 ,
	.Xr ssh 1 ,
	.Xr ssh-add 1 ,
	.Xr ssh-keygen 1 ,
	.Xr ssh_config 5 ,
	.Xr glob 7 ,
	.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