We sometimes have to use scp to copy files remotely because of work needs, but do you know how to use scp to copy files remotely under Linux ?
I believe that many friends are not very familiar, so let's take a look at the method of using scp to copy files under Linux.
SSH provides some commands and shell to log in to the remote server. It does not allow you to copy files by default, but it still provides a "scp" command.
Suppose you want to copy a file named "wuyang" in the current directory of the local computer to your home directory on the remote server 192.168.0.2.
And your account name on the remote server is "root". You can use this command:
scp wuyang [email protected]
to copy the file back with this command:
scp [email protected]: wuyang
About scp command
scp command is the most convenient and useful command in SSH. Imagine that on two servers
Transfer files directly between them, just use scp a command to completely solve. You can be on a server
running #scp servername as root:. / Home / ftp / pub / file1 so put another
file on a server / home / ftp / pub / file1 directly to the machine's current directory Next, of
course, you can also use #scp / tmp / file2 servername: / boot to send the file
/ tmp / file2 on this machine to the / boot directory of another machine. And the entire transmission process is still
encrypted with SSH.
Explanation with man command:
man Scp | more
Reformatting rcp (1), please wait ...
SCP (1) BSD General Commands Manual SCP (1)
NAME
scp-secure copy (remote file copy program)
SYNOPSIS
scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
[-l limit] [-o ssh_option] [-P port] [-S program]
[[user@]host1:]file1 [...] [[user@]host2:]file2
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
as ssh(1). Unlike rcp(1), scp will ask for passwords or passphrases if
they are needed for authentication.
Any file name may contain a host and user specification to indicate that
the file is to be copied to/from that host. Copies between two remote
hosts are permitted.
The options are as follows:
-1 Forces scp to use protocol 1.
-2 Forces 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 com-
pression.
-c cipher
Selects the cipher to use for encrypting the data transfer. This
option is directly passed to ssh(1).
-F ssh_config
Specifies an alternative per-user configuration file for ssh.
This option is directly passed to ssh(1).
-i identity_file
Selects the file from which the identity (private key) for RSAauthentication is read. 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 separate scp command-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
ConnectionTimeout
GlobalKnownHostsFile
GSSAPIAuthentication
GSSAPIDelegateCredentials
Host
HostbasedAuthentication
HostKeyAlgorithms
HostKeyAlias
HostName
IdentityFile
IdentitiesOnly
LogLevel
MACs
NoHostAuthenticationForLocalhost
NumberOfPasswordPrompts
PasswordAuthentication
Port
PreferredAuthentications
Protocol
ProxyCommand
PubkeyAuthentication
RhostsRSAAuthentication
RSAAuthentication
ServerAliveInterval
ServerAliveCountMax
SmartcardDevice
StrictHostKeyChecking
TCPKeepAlive
UsePrivilegedPort
User
UserKnownHostsFile
VerifyHostKeyDNS
-P port
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 in
rcp(1).
-p Preserves modification times, access times, and modes from the
original file.
-q Disables the progress meter.
-r Recursively copy entire directories.
-S program
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.
DIAGNOSTICS
scp exits with 0 on success or >0 if an error occurred.
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.
The above is the method of remotely using scp to copy files under Linux.