NAME
sftp
—
secure file transfer program
SYNOPSIS
sftp |
[-46aCfpqrv ] [-B
buffer_size] [-b
batchfile] [-c
cipher] [-D
sftp_server_path] [-F
ssh_config] [-i
identity_file] [-J
destination] [-l
limit] [-o
ssh_option] [-P
port] [-R
num_requests] [-S
program] [-s
subsystem | sftp_server]
destination |
DESCRIPTION
sftp
is a file transfer program, similar
to ftp(1), which performs all operations over an encrypted
ssh(1) transport. It may also use many features of ssh, such as
public key authentication and compression.
The destination may be specified either as [user@]host[:path] or as a URI in the form sftp://[user@]host[:port][/path].
If the destination includes a
path and it is not a directory,
sftp
will retrieve files automatically if a
non-interactive authentication method is used; otherwise it will do so after
successful interactive authentication.
If no path is specified, or if the
path is a directory, sftp
will
log in to the specified 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 path
to be interpreted as a directory.
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.
The options are as follows:
-4
- Forces
sftp
to use IPv4 addresses only. -6
- Forces
sftp
to use IPv6 addresses only. -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.
-B
buffer_size- Specify the size of the buffer that
sftp
uses when transferring files. Larger buffers require fewer round trips at the cost of higher memory consumption. The default is 32768 bytes. -b
batchfile- Batch mode reads a series of commands from an input
batchfile instead of
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
sshd(8) and
ssh-keygen(1) for details).
A batchfile of ‘-’ may be used to indicate standard input.
sftp
will abort if any of the following commands fail:get
,put
,reget
,reput
,rename
,ln
,rm
,mkdir
,chdir
,ls
,lchdir
,chmod
,chown
,chgrp
,lpwd
,df
,symlink
, andlmkdir
.Termination on error can be suppressed on a command by command basis by prefixing the command with a ‘-’ character (for example,
-rm /tmp/blah*
). Echo of the command may be suppressed by prefixing the command with a ‘@’ character. These two prefixes may be combined in any order, for example-@ls /bsd
. -C
- Enables compression (via ssh's
-C
flag). -c
cipher- Selects the cipher to use for encrypting the data transfers. This option is directly passed to ssh(1).
-D
sftp_server_path- Connect directly to a local sftp server (rather than via ssh(1)). This option may be useful in debugging the client and server.
-F
ssh_config- Specifies an alternative per-user configuration file for ssh(1). This option is directly passed to ssh(1).
-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.
-i
identity_file- Selects the file from which the identity (private key) for public key authentication is read. This option is directly passed to ssh(1).
-J
destination- Connect to the target host by first making an
sftp
connection to the jump host described by 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 aProxyJump
configuration directive. This option is directly passed to ssh(1). -l
limit- Limits the used bandwidth, specified in Kbit/s.
-o
ssh_option- Can be used to pass options to
ssh
in the format used in ssh_config(5). This is useful for specifying options for which there is no separatesftp
command-line flag. For example, to specify an alternate port use:sftp -oPort=24
. For full details of the options listed below, and their possible values, see ssh_config(5).- AddressFamily
- BatchMode
- BindAddress
- BindInterface
- CanonicalDomains
- CanonicalizeFallbackLocal
- CanonicalizeHostname
- CanonicalizeMaxDots
- CanonicalizePermittedCNAMEs
- CASignatureAlgorithms
- CertificateFile
- ChallengeResponseAuthentication
- CheckHostIP
- Ciphers
- Compression
- ConnectionAttempts
- ConnectTimeout
- ControlMaster
- ControlPath
- ControlPersist
- GlobalKnownHostsFile
- GSSAPIAuthentication
- GSSAPIDelegateCredentials
- HashKnownHosts
- Host
- HostbasedAuthentication
- HostbasedKeyTypes
- HostKeyAlgorithms
- HostKeyAlias
- Hostname
- IdentitiesOnly
- IdentityAgent
- IdentityFile
- IPQoS
- KbdInteractiveAuthentication
- KbdInteractiveDevices
- KexAlgorithms
- LogLevel
- MACs
- NoHostAuthenticationForLocalhost
- NumberOfPasswordPrompts
- PasswordAuthentication
- PKCS11Provider
- Port
- PreferredAuthentications
- ProxyCommand
- ProxyJump
- PubkeyAcceptedKeyTypes
- PubkeyAuthentication
- RekeyLimit
- SendEnv
- ServerAliveInterval
- ServerAliveCountMax
- SetEnv
- StrictHostKeyChecking
- TCPKeepAlive
- UpdateHostKeys
- User
- UserKnownHostsFile
- VerifyHostKeyDNS
-P
port- Specifies the port to connect to on the remote host.
-p
- Preserves modification times, access times, and modes from the original files transferred.
-q
- Quiet mode: disables the progress meter as well as warning and diagnostic messages from ssh(1).
-R
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.
-r
- Recursively copy entire directories when uploading and downloading. Note
that
sftp
does not follow symbolic links encountered in the tree traversal. -S
program- Name of the program to use for the encrypted connection. The program must understand ssh(1) options.
-s
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 sshd(8) does not have an sftp subsystem configured.
-v
- Raise logging level. This option is also passed to ssh.
INTERACTIVE COMMANDS
Once in interactive mode, sftp
understands
a set of commands similar to those of
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
glob(3) must be escaped with backslashes (‘\’).
bye
- Quit
sftp
. cd
[path]- Change remote directory to path. If path is not specified, then change directory to the one the session started in.
chgrp
[-h
] grp path- Change group of file path to
grp. If the
-h
flag is specified, then symlinks will not be followed. path may contain glob(7) characters and may match multiple files. grp must be a numeric GID. chmod
[-h
] mode path- Change permissions of file path to
mode. If the
-h
flag is specified, then symlinks will not be followed. path may contain glob(7) characters and may match multiple files. chown
[-h
] own path- Change owner of file path to
own. If the
-h
flag is specified, then symlinks will not be followed. path may contain glob(7) characters and may match multiple files. own must be a numeric UID. df
[-hi
] [path]- Display usage information for the filesystem holding the current directory
(or path if specified). If the
-h
flag is specified, the capacity information will be displayed using "human-readable" suffixes. The-i
flag requests display of inode information in addition to capacity information. This command is only supported on servers that implement the “statvfs@openssh.com” extension. exit
- Quit
sftp
. get
[-afpR
] remote-path [local-path]- Retrieve the 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. remote-path may
contain glob(7) characters and may match multiple files. If it does and
local-path is specified, then
local-path must specify a directory.
If the
-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.If the
-f
flag is specified, then fsync(2) will be called after the file transfer has completed to flush the file to disk.If the
-p
flag is specified, then full file permissions and access times are copied too.If the
-R
flag is specified then directories will be copied recursively. Note thatsftp
does not follow symbolic links when performing recursive transfers. help
- Display help text.
lcd
[path]- Change local directory to path. If path is not specified, then change directory to the local user's home directory.
lls
[ls-options [path]]- Display local directory listing of either path or current directory if path is not specified. ls-options may contain any flags supported by the local system's ls(1) command. path may contain glob(7) characters and may match multiple files.
lmkdir
path- Create local directory specified by path.
ln
[-s
] oldpath newpath- Create a link from oldpath to
newpath. If the
-s
flag is specified the created link is a symbolic link, otherwise it is a hard link. lpwd
- Print local working directory.
ls
[-1afhlnrSt
] [path]- Display a remote directory listing of either path or
the current directory if path is not specified.
path may contain
glob(7) characters and may match multiple files.
The following flags are recognized and alter the behaviour of
ls
accordingly:-1
- Produce single columnar output.
-a
- List files beginning with a dot (‘.’).
-f
- Do not sort the listing. The default sort order is lexicographical.
-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.).
-l
- Display additional details including permissions and ownership information.
-n
- Produce a long listing with user and group information presented numerically.
-r
- Reverse the sort order of the listing.
-S
- Sort the listing by file size.
-t
- Sort the listing by last modification time.
lumask
umask- Set local umask to umask.
mkdir
path- Create remote directory specified by path.
progress
- Toggle display of progress meter.
put
[-afpR
] local-path [remote-path]- Upload 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. local-path may
contain glob(7) characters and may match multiple files. If it does and
remote-path is specified, then
remote-path must specify a directory.
If the
-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.If the
-f
flag is specified, then a request will be sent to the server to call fsync(2) after the file has been transferred. Note that this is only supported by servers that implement the "fsync@openssh.com" extension.If the
-p
flag is specified, then full file permissions and access times are copied too.If the
-R
flag is specified then directories will be copied recursively. Note thatsftp
does not follow symbolic links when performing recursive transfers. pwd
- Display remote working directory.
quit
- Quit
sftp
. reget
[-fpR
] remote-path [local-path]- Resume download of remote-path. Equivalent to
get
with the-a
flag set. reput
[-fpR
] local-path [remote-path]- Resume upload of local-path. Equivalent to
put
with the-a
flag set. rename
oldpath newpath- Rename remote file from oldpath to newpath.
rm
path- Delete remote file specified by path.
rmdir
path- Remove remote directory specified by path.
symlink
oldpath newpath- Create a symbolic link from oldpath to newpath.
version
- Display the
sftp
protocol version. !
command- Execute command in local shell.
!
- Escape to local shell.
?
- Synonym for help.
SEE ALSO
ftp(1), ls(1), scp(1), ssh(1), ssh-add(1), ssh-keygen(1), ssh_config(5), glob(7), sftp-server(8), sshd(8)
T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-filexfer-00.txt, January 2001, work in progress material.