Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

15.7. OpenSSH Users Tools

The commands listed belows are some that we use often in our regular use, but many more exist, and you should check the man page and documentation for more details. The ssh Secure Shell command provides secure encrypted communications between two untrusted hosts over an insecure network. It is a program for logging securely into a remote machine and executing commands from there. It is a suitable replacement for insecure programs like telnet, rlogin, rcp, rdist, and rsh.

To login to a remote machine, use the command:

          [[email protected]] /#ssh -l <login_name> <hostname>
          

Example 15-1. Remote login using ssh


          [[email protected]] /#ssh -l admin www.openna.com
          

          [email protected] password:
          Last login: Tue Oct 19 1999 18:13:00 -0400 from deep.openna.com
          No mail.          
          
          

          [[email protected] ]/admin$
          
Where <login_name> is the name you use to connect to the ssh server and <hostname> is the remote address of your ssh server.

15.7.1. scp

The scp Secure Copy utility copies files from the local system to a remote system or vice versa, or even between two remote systems using the scp command. To copy files from remote to local system, use the following command:

          [[email protected]] /#su admin
          [[email protected] /]$scp -p <[email protected]>:/dir/for/file localdir/to/filelocation
          

Example 15-2. scp Secure Copy utility


          [[email protected] /]$ scp1 -p [email protected]:/etc/test1 /tmp
          

Enter passphrase for RSA key '[email protected]': test1 | 2 KB | 2.0 kB/s | ETA: 00:00:00 | 100%

To copy files from local to remote system, use the following command:

          [[email protected]] /#su admin
          [[email protected] /]$scp -p localdir/to/filelocation <[email protected]>:/dir/for/file
          

Example 15-3. local to remote


          [[email protected] /]$scp1 -p /usr/bin/test2 [email protected]:/var/tmp
          

[email protected]'s password: test2 | 7 KB | 7.9 kB/s | ETA: 00:00:00 | 100%

Tip: The -p option indicates that the modification and access times, as well as modes of the source file, should be preserved on the copy. This is usually desirable.

Some possible uses of OpenSSH softwareare:

  1. Replace telnet, rlogin, rsh, rdist, and rcp.

  2. Make secure backups over the network.

  3. Execute remote commands.

  4. Access to corporate resources over the Internet.

 
 
  Published under the terms of the Open Publication License Design by Interspire