SCP Secure CP

fedorafred (Fred) — Thu, 15 May 2008 20:32:23 GMT

// description of your code here



Scp is a utility which allows files to be copied between machines. Scp is an updated version of an older utility named Rcp. It works the same, except that information (including the password used to log in) is encrypted. Also, if you have set up your .shosts file to allow you to ssh between machines without using a password as described in help on setting up your .shosts file, you will be able to scp files between machines without entering your password.

Usage of the Scp Command



The general form of the command is:



	% scp source-specification destination-specification

	



where source-specification indicates which file or directory is to be copied, and destination-specification indicates where the copied material is to be placed.



Either the source or the destination may be on the remote machine; i.e., you may copy files or directories into the account on the remote system OR copy them from the account on the remote system into the account you are logged into.



Example:



	% scp myfile xyz@sdcc7:myfile

	



To copy a directory, use the -r (recursive) option. Example:



	% scp -r mydir xyz@sdcc7:mydir

	



File Specification Formats



The format for the remote specification (source or destination) is:



	user@machine:filename

	



where filename is the name (path) of the file or directory relative to the home (login) directory on the remote system.



The format for file specification on the local system is just:



	filename

	



where fname is the name (path) relative to the current working directory on that system.

How scp is similar to cp



Just like the cp command, scp will overwrite an existing destination file. In addition, if the destination is an existing directory, the copied material will be placed beneath the directory.

Examples of remote file copies



   1. While logged into xyz on sdcc7, copy file "letter" into file "application" in remote account abc on sdcc3:



      	% scp letter abc@sdcc3:application

      	



   2. While logged into abc on sdcc3, copy file "foo" from remote account xyz on sdcc7 into filename "bar" in abc:



      	% scp xyz@sdcc7:foo bar



      	



   3. While logged into account xyz on sdcc7, copy file "garfield" from subdirectory "comix" into filename "fatcat" in subdirectory "stuff" in remote account abc on sdcc3:



      	% scp comix/garfield abc@sdcc3:stuff/fatcat

      	



   4. While logged into account abc on sdcc3, copy file "garfield" from subdirectory "comix" of account xyz on sdcc7 into subdirectory "stuff" with the same name "garfield":



      	% scp xyz@sdcc7:comix/garfield stuff

      	



   5. While logged into account abc on sdcc3 , copy subdirectory "Section" into a new subdirectory called "Section" in existing subdirectory "Chapter" in account xyz on sdcc7:



      	% scp -r Section xyz@sdcc7:Chapter

      	



   6. From account abc on sdcc3, copy entire account to ir123 on iacs5. This needs to be done from the parent directory of the account to be moved.



      	% cd

      	% cd ..

      	% scp -r abc ir123@iacs5:abc

Copy Public Key To Host In One Line

timmorgan (Tim Morgan) — Wed, 19 Mar 2008 18:23:53 GMT



ssh username@host "echo `cat ~/.ssh/id_dsa.pub` >> ~/.ssh/authorized_keys"

ssh and scp without typing a password each time

nevadalife (nevada) — Sat, 23 Sep 2006 18:33:56 GMT

* You can create and exchange ssh keys to avoid repeatedly typing your password.


Source:      ssh-keygen -t dsa                                     Type this once per log-in session

Source:      Now copy the .ssh/id_dsa.pub file to .

Source:      scp .ssh/id_dsa.pub userid@:tempid        we've renamed it tempid.

Destination: cat tempid >> .ssh/authorized_keys                     

add the contents of tempid to .ssh/authorized_keys.

Destination: rm tempid.

SSH Key Pairs Stuff

jnunemaker () — Sun, 27 Aug 2006 22:47:31 GMT

//allows for copying of ssh keys



ssh-keygen -t dsa

ssh user@host 'cat >> .ssh/authorizedkeys' < .ssh/id_dsa.pub

DZone Snippets: scp code

SCP Secure CP

Copy Public Key To Host In One Line

ssh and scp without typing a password each time

SSH Key Pairs Stuff