This means that the mechanism that checks for new updates/patches can be 
scheduled regularly and be allowed to implement the changes automatically.
Inherent support for remote access
The Linux operating system has inherent remote access through TCP/IP, like all 
Unix operating systems. This is a really powerful tool for systems management, 
because almost all management tasks can be done remotely, and since the 
advent of the secure socket layer can be done securely using ssh.
Remote access to the client is useful for two types of administrative tasks:
Remote execution of administrative programs or monitoring scripts
Access the client from a central location to give support on the client
Remote execution
Remote execution is used to execute applications or scripts from a central 
location, for example, to force all clients to update a virus scanner or fetch a 
critical security patch. This can also be used to execute monitoring scripts that 
will enable the administrator to do preventive work, for example, to clear a 
temporary directory before a file system fills up.
Remote support
Almost all support on the client can be provided by accessing the client from a 
remote location. The only types of problems that still require hands on interaction 
at the client are network problems. All other problems reported by the end user 
can be handled by logging onto the client remotely and studying the system 
configuration and the log files. This capability could improve the effectiveness of 
helpdesk staff significantly.
Remote management and provisioning tools
There are a lot of tools available in the open source community as well as from 
commercial parties for remote management or monitoring and provisioning. 
Some of the most popular tools are:
Webmin
1
Big Brother/Big Sister
2
Nagios
3
Webmin is mainly used for remote management of a single machine. Big Brother 
and Nagios are mostly used to monitor run time properties of a network of 
1  
http://www.sourceforge.net/projects/webadmin
; 
http://www.webmin.com
2  
http://www.sourceforge.net/projects/big brother
; 
http://www.sourceforge.net/projects/bigsister
;
http://www.bb4.org
3  
http://sourceforge.net/projects/nagios
; 
http://www.nagios.org/
 Chapter 2. The case for migration 
17






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