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Top Forums UNIX for Advanced & Expert Users scp command for file transfer Post 302563395 by jayan_jay on Tuesday 11th of October 2011 05:59:46 AM
Old 10-11-2011
https://www.unix.com/unix-linux-appli...eneration.html

Source got from browsing ..
Code:
Creating a key 
 
Use ssh-keygen. I recommend the '-t rsa' option, which creates an RSA key 
for use with version 2 of the SSH protocol. (You can use '-t rsa1' for a 
version 1 key and '-t dsa' for a DSA key, which may not be supported 
everywhere.) 
Note that with SSH1 there is no -t option, because there's only one type 
of key. 
 
Running ssh-keygen 
 
$ ssh-keygen -t rsa 
Generating public/private rsa key pair. 
Enter file in which to save the key (/home/user/.ssh/id_rsa): [press enter for default] 
Enter passphrase (empty for no passphrase): [not shown] 
Enter same passphrase again: [not shown] 
Your identification has been saved in /home/user/.ssh/id_rsa. 
Your public key has been saved in /home/user/.ssh/id_rsa.pub. 
The key fingerprint is: 
44:c8:07:c9:f8:f4:f5:9b:05:d1:0f:d1:05:f0:5d:bf user@localhost 
$ 
 
Allowing login via that key 
On the remote host, add the line in /home/user/.ssh/id_rsa.pub to 
~/.ssh/authorized_keys. 
 
Quick approach 
 
$ scp ~/.ssh/id_rsa.pub somehost:. 
user@somehost's password: [not shown] 
id_rsa.pub           100% |*****************************|   225 00:00 
$ ssh somehost 
user@somehost's password: [not shown] 
somehost$ cat id_rsa.pub >> ~/.ssh/authorized_keys 
somehost$ rm id_rsa.pub 
somehost$ exit 
$ ssh somehost 
Enter passphrase for key '/home/user/.ssh/id_rsa': [not shown] 
somehost$

 

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SCP(1)							    BSD General Commands Manual 						    SCP(1)

NAME
scp -- secure copy (remote file copy program) SYNOPSIS
scp [-12346BCEpqrv] [-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 secu- rity as ssh(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 explicit using absolute or relative pathnames to avoid scp treating file names containing ':' as host specifiers. Copies between two remote hosts are also permitted. The options are as follows: -1 Forces scp to use protocol 1. -2 Forces scp to use protocol 2. -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. -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. -E Preserves extended attributes, resource forks, and ACLs. Requires both ends to be running Mac OS X 10.4 or later. -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 public key authentication 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 ConnectTimeout ControlMaster ControlPath ControlPersist GlobalKnownHostsFile GSSAPIAuthentication GSSAPIDelegateCredentials HashKnownHosts Host HostbasedAuthentication HostKeyAlgorithms HostKeyAlias HostName IdentityFile IdentitiesOnly IPQoS KbdInteractiveAuthentication KbdInteractiveDevices KexAlgorithms LogLevel MACs NoHostAuthenticationForLocalhost NumberOfPasswordPrompts PasswordAuthentication PKCS11Provider Port PreferredAuthentications Protocol ProxyCommand PubkeyAuthentication RekeyLimit RhostsRSAAuthentication RSAAuthentication SendEnv ServerAliveInterval ServerAliveCountMax 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 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. -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. EXIT STATUS
The scp utility exits 0 on success, and >0 if an error occurs. 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
September 5, 2011 BSD
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