• Man Ssh_keygen
• Man Ssh-copy-id

scp — OpenSSH secure file copy

SSH Command in Linux. The ssh command provides a secure encrypted connection between two. SSH Keys and Public Key Authentication. The SSH protocol uses public key cryptography for. NAME sshd − secure shell daemon. SYNOPSIS sshd -diqQ46 -b bits -f configfile -g logingracetime -h hostkeyfile -k keygentime -p port -u len -V clientprotocolid. DESCRIPTION The sshd (Secure Shell daemon) is the daemon program for ssh(1).Together these programs replace rlogin and rsh, and provide secure encrypted communications between two untrusted hosts over an.

Specifies the protocol versions ssh should support in order of preference. The possible values are 1 and 2.Multiple versions must be comma-separated. The default is 1,2.This means that ssh tries version 1 and falls back to version 2 if version 1 is not available. Ssh (SSH client) is a program for logging into a remote machine and for executing commands on a remote machine. It is intended to provide secure encrypted communications between two untrusted hosts over an insecure network.

scp	[-346ABCpqrTv] [-ccipher] [-Fssh_config] [-iidentity_file] [-Jdestination] [-llimit] [-ossh_option] [-Pport] [-Sprogram] source .. target

scp copies files between hosts on a network.

It uses ssh(1) for data transfer, and uses the same authentication and provides the same security as a login session. The scp protocol requires execution of the remote user's shell to perform glob(3) pattern matching.

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 may only be specified on the target if the -3 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 this option disables the progress meter and selects batch mode for the second host, since scp cannot ask for passwords or passphrases for both hosts.

-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 forward 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.

-ccipher

Selects the cipher to use for encrypting the data transfer. This option is directly passed to ssh(1).

-Fssh_config

Specifies an alternative per-user configuration file for ssh. This option is directly passed to ssh(1).

-iidentity_file

Selects the file from which the identity (private key) for public key authentication is read. This option is directly passed to ssh(1).

-Jdestination

Connect to the target host by first making an scp 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 a ProxyJump configuration directive. This option is directly passed to ssh(1).

-llimit

Limits the used bandwidth, specified in Kbit/s.

-ossh_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).

-Pport

Specifies the port to connect to on the remote host. Note that this option is written with a capital ‘P’, because -p is already reserved for preserving the times and modes of the file.

-p

Preserves modification times, access times, and modes from the original file.

-q

Quiet mode: disables the progress meter as well as warning and diagnostic messages from ssh(1).

-r

Man Ssh_keygen

Recursively copy entire directories. Note that scp follows symbolic links encountered in the tree traversal.

-Sprogram

Name of program to use for the encrypted connection. The program must understand ssh(1) options.

-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 configuration problems.

The scp utility exits 0 on success, and >0 if an error occurs.

sftp(1), ssh(1), ssh-add(1), ssh-agent(1), ssh-keygen(1), ssh_config(5), sshd(8)

scp is based on the rcp program in BSD source code from the Regents of the University of California.

Timo Rinne <tri@iki.fi>
Tatu Ylonen <ylo@cs.hut.fi>

Name

scp - secure copy (remote file copy program)

Synopsis

scp [-1246BCpqrv] [-ccipher] [-Fssh_config] [-iidentity_file] [-llimit] [-ossh_option] [-Pport] [-Sprogram] [

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 security asssh(1). Unlike rcp(1), scp will ask for passwords or passphrases if they are needed for authentication.

File names may contain a user and host specification to indicate that the file is to be copied to/from that host. Local file names can be made explicitusing absolute or relative pathnames to avoid scp treating file names containing ':' as host specifiers. Copies between two remote hosts are alsopermitted.

When copying a source file to a target file which already exists, scp will replace the contents of the target file (keeping the inode).

If the target file does not yet exist, an empty file with the target file name is created, then filled with the source file contents. No attempt is made at'near-atomic' transfer using temporary files.

The options are as follows:

-2' Forces

Man Ssh-copy-id

scp to use protocol 2.

-4' Forces scp to use IPv4 addresses only.

-6' Forces scp to use IPv6 addresses only.

-B' Selects batch mode (prevents asking for passwords or passphrases).

-C' Compression enable. Passes the -C flag to ssh(1) to enable compression.

-ccipher
Selects the cipher to use for encrypting the data transfer. This option is directly passed to ssh(1).

-Fssh_config
Specifies an alternative per-user configuration file for ssh. This option is directly passed to ssh(1).

-iidentity_file
Selects the file from which the identity (private key) for public key authentication is read. This option is directly passed to ssh(1).

-llimit
Limits the used bandwidth, specified in Kbit/s.

-ossh_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 scpcommand-line flag. For full details of the options listed below, and their possible values, see ssh_config(5).

AddressFamily
BatchMode
BindAddress
ChallengeResponseAuthentication
CheckHostIP
Cipher
Ciphers
Compression
CompressionLevel
ConnectionAttempts
ConnectTimeout
ControlMaster
ControlPath
GlobalKnownHostsFile
GSSAPIAuthentication
GSSAPIDelegateCredentials
HashKnownHosts
Host'
HostbasedAuthentication
HostKeyAlgorithms
HostKeyAlias
HostName
IdentityFile
IdentitiesOnly
KbdInteractiveDevices
LogLevel
MACs'
NoHostAuthenticationForLocalhost
NumberOfPasswordPrompts
PasswordAuthentication
Port'
PreferredAuthentications
Protocol
ProxyCommand
PubkeyAuthentication
RekeyLimit
RhostsRSAAuthentication
RSAAuthentication
SendEnv
ServerAliveInterval
ServerAliveCountMax
SmartcardDevice
StrictHostKeyChecking
TCPKeepAlive
UsePrivilegedPort
User'
UserKnownHostsFile
VerifyHostKeyDNS

-Pport
Specifies the port to connect to on the remote host. Note that this option is written with a capital 'P', because -p is already reserved for preservingthe times and modes of the file in rcp(1).

-p' Preserves modification times, access times, and modes from the original file.

-q' Quiet mode: disables the progress meter as well as warning and diagnostic messages from ssh(1).

-r' Recursively copy entire directories. Note that scp follows symbolic links encountered in the tree traversal.

-Sprogram
Name of program to use for the encrypted connection. The program must understand ssh(1) options.

-v' Verbose mode. Causes scp and ssh(1) to print debugging messages about their progress. This is helpful in debugging connection,authentication, and configuration problems.

The scp utility exits 0 on success, and >0 if an error occurs.

IPV6

IPv6 address can be used everywhere where IPv4 address. In all entries must be the IPv6 address enclosed in square brackets. Note: The square brackets aremetacharacters for the shell and must be escaped in shell.

See Also

rcp(1), sftp(1), ssh(1), ssh-add(1), ssh-agent(1), ssh-keygen(1), ssh_config(5), sshd(8)

History

scp is based on the rcp(1) program in BSD source code from the Regents of the University of California.

Authors

Timo Rinne <tri@iki.fi>
Tatu Ylonen <ylo@cs.hut.fi>

BSD April 14, 2013 BSD

Referenced By

amaddclient(8),cpdup(1),darcs(1),gsissh(1),gsissh_config(5),gsisshd(8),htcp(1),mirrordir(1),openvpn(8),rbldnsd(8),rshdown(1),rssh(1),rssh.conf(5),scponly(8),ztelnet(1)