tail command

Recently Debian Linux version 7.0 (“Wheezy”) released. This version shipped with many new features – improvements to multimedia support, improved security through hardening flags and the OpenStack suite and the Xen Cloud Platform to name a few. How do I upgrades from Debian Linux version 6.x.x (squeeze) to the latest version 7.0.0 wheezy using command line options? How do I upgrade my Debian 6.x server to 7.x over the ssh session?

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How do I install MySQL database server on CentOS Linux version 5 or version 6 using command line options? How do I configuring MySQL server on CentOS Linux?

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Can you tell me the location of for the MySQL error log file under Debian or Ubuntu Linux? How do I view error log file?

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My CentOS Apache 2 (httpd) webserver will not start. It was working fine, but I made few changes to httpd.conf and it is not restarting. What are some things to check in order to solve my Apache server restart issues?

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How do I bind Postfix MTA to specific IP address such as 127.0.0.1 or 202.5.1.2?

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How do I verify or check cronjob is running or not under CentOS / RHEL / Fedora Linux from a shell prompt?

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I‘m running CentOS 5.x server with Apache 2.2 + PHP 5.x server. Can you tell me exact location for php error log file?

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