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server administrator

Q. I've recently changed email user account password using passwd command, for one my postfix email server which requires SMTP authentication before sending an email. Now following error is logged into my /var/log/maillog file:

ERROR: Password not accepted from server: 535 5.7.0 Error: authentication failed: authentication failure

How do I solve this problem under Red Hat enterprise Linux running Postfix with SASL authentication?
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Q. How do I view and verify Apache server performance status under Linux / UNIX operating system?

A. The Status module (mod_status) allows a server administrator to find out how well their server is performing. A HTML page is presented that gives the current server statistics in an easily readable form. If required this page can be made to automatically refresh.

The details given are:

* The number of children serving requests.
* The number of idle children.
* The status of each child, the number of requests that child has performed and the total number of bytes served by the child (*)
* A total number of accesses and byte count served (*).
* The time the server was started/restarted and the time it has been running for
* Averages giving the number of requests per second, the number of bytes served per second and the average number of bytes per request (*).
* The current percentage CPU used by each child and in total by Apache (*).
* The current hosts and requests being processed (*).

Details marked "(*)" are only available with ExtendedStatus On.

Configure Apache mod_status

Open your httpd.conf file:
# vi httpd.conf
Append / modify (or uncomment) directives as follows:
<Location /server-status>
SetHandler server-status
Order Deny,Allow
Deny from all
Allow from 192.168.1.5
</Location>

Replace 192.168.1.5 with your workstation IP address. Save and close the file. Restart httpd server:
# /etc/init.d/httpd restart
For full status report type:
# /etc/init.d/httpd fullstatus

To view status report type url - http://your.com/server-status.

You can now access server statistics by using a Web browser to access the page http://your.server.name/server-status

References: