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SCP(1) BSD General Commands Manual SCP(1)
NAME
scp -- OpenSSH secure file copy
SYNOPSIS
scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config] [-i identity_file]
[-J destination] [-l limit] [-o ssh_option] [-P port] [-S program] source ... target
DESCRIPTION
scp copies files between hosts on a network.
It uses ssh(1) for data transfer, and uses the same authentication and provides the same se-
curity as a login session.
scp will ask for passwords or passphrases if they are needed for authentication.
The source and target may be specified as a local pathname, a remote host with optional path
in the form [user@]host:[path], or a URI in the form scp://[user@]host[:port][/path]. Local
file names can be made explicit using absolute or relative pathnames to avoid scp treating
file names containing ':' as host specifiers.
When copying between two remote hosts, if the URI format is used, a port cannot be specified
on the target if the -R option is used.
The options are as follows:
-3 Copies between two remote hosts are transferred through the local host. Without
this option the data is copied directly between the two remote hosts. Note that,
when using the original SCP protocol (the default), this option selects batch mode
for the second host as scp cannot ask for passwords or passphrases for both hosts.
This mode is the default.
-4 Forces scp to use IPv4 addresses only.
-6 Forces scp to use IPv6 addresses only.
-A Allows forwarding of ssh-agent(1) to the remote system. The default is not to for-
ward an authentication agent.
-B Selects batch mode (prevents asking for passwords or passphrases).
-C Compression enable. Passes the -C flag to ssh(1) to enable compression.
-c cipher
Selects the cipher to use for encrypting the data transfer. This option is directly
passed to ssh(1).
-D sftp_server_path
When using the SFTP protocol support via -s, connect directly to a local SFTP server
program rather than a remote one 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. This option is di-
rectly passed to ssh(1).
-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 scp connection to the jump host de-
scribed by destination and then establishing a TCP forwarding to the ultimate desti-
nation from there. Multiple jump hops may be specified separated by comma charac-
ters. This is a shortcut to specify a ProxyJump configuration directive. This op-
tion is directly passed to ssh(1).
-l limit
Limits the used bandwidth, specified in Kbit/s.
-O Use the original SCP protocol for file transfers instead of the SFTP protocol.
Forcing the use of the SCP protocol may be necessary for servers that do not imple-
ment SFTP, for backwards-compatibility for particular filename wildcard patterns and
for expanding paths with a '~' prefix for older SFTP servers. This mode is the de-
fault.
-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 separate scp command-line flag.
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
CheckHostIP
Ciphers
Compression
ConnectionAttempts
ConnectTimeout
ControlMaster
ControlPath
ControlPersist
GlobalKnownHostsFile
GSSAPIAuthentication
GSSAPIDelegateCredentials
HashKnownHosts
Host
HostbasedAcceptedAlgorithms
HostbasedAuthentication
HostKeyAlgorithms
HostKeyAlias
Hostname
IdentitiesOnly
IdentityAgent
IdentityFile
IPQoS
KbdInteractiveAuthentication
KbdInteractiveDevices
KexAlgorithms
KnownHostsCommand
LogLevel
MACs
NoHostAuthenticationForLocalhost
NumberOfPasswordPrompts
PasswordAuthentication
PKCS11Provider
Port
PreferredAuthentications
ProxyCommand
ProxyJump
PubkeyAcceptedAlgorithms
PubkeyAuthentication
RekeyLimit
SendEnv
ServerAliveInterval
ServerAliveCountMax
SetEnv
StrictHostKeyChecking
TCPKeepAlive
UpdateHostKeys
User
UserKnownHostsFile
VerifyHostKeyDNS
-P port
Specifies the port to connect to on the remote host. Note that this option is writ-
ten with a capital 'P', because -p is already reserved for preserving the times and
mode bits of the file.
-p Preserves modification times, access times, and file mode bits from the source file.
-q Quiet mode: disables the progress meter as well as warning and diagnostic messages
from ssh(1).
-R Copies between two remote hosts are performed by connecting to the origin host and
executing scp there. This requires that scp running on the origin host can authen-
ticate to the destination host without requiring a password.
-r Recursively copy entire directories. Note that scp follows symbolic links encoun-
tered in the tree traversal.
-S program
Name of program to use for the encrypted connection. The program must understand
ssh(1) options.
-s Use the SFTP protocol for transfers rather than the original scp protocol.
-T Disable strict filename checking. By default when copying files from a remote host
to a local directory scp checks that the received filenames match those requested on
the command-line to prevent the remote end from sending unexpected or unwanted
files. Because of differences in how various operating systems and shells interpret
filename wildcards, these checks may cause wanted files to be rejected. This option
disables these checks at the expense of fully trusting that the server will not send
unexpected filenames.
-v Verbose mode. Causes scp and ssh(1) to print debugging messages about their
progress. This is helpful in debugging connection, authentication, and configura-
tion problems.
EXIT STATUS
The scp utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
sftp(1), ssh(1), ssh-add(1), ssh-agent(1), ssh-keygen(1), ssh_config(5), sftp-server(8),
sshd(8)
HISTORY
scp is based on the rcp program in BSD source code from the Regents of the University of
California.
AUTHORS
Timo Rinne <tri AT iki.fi>
Tatu Ylonen <ylo AT cs.fi>
CAVEATS
The original SCP protocol (used by default) requires execution of the remote user's shell to
perform glob(3) pattern matching. This requires careful quoting of any characters that have
special meaning to the remote shell, such as quote characters.
BSD February 10, 2022 BSD
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