Tutorial Tag

administration

  1. How To Test DNS Resolution With NSlookup

    What is NSlookup? NSlookup is a utility that allows users to verify that a given domain name (or domain record) is resolving properly locally on their PC. It is also useful to check DNS caching, to ensure that after a DNS changeover that the PC is seeing the new IP address entry. Using NSlookup To access nslookup on a Windows workstation, perform one of the following: Windows 7 or Vista: From the Start menu, in the search field, type cmd, and then press Enter. ...
  2. How To Upgrade Debian Lenny (5.0) To Squeeze (6.0)

    Please Note: It is wise to uninstall packages from third-party sources or those that were manually installed via a .deb to prevent possible conflicts and related issues. To begin, edit /etc/apt/sources.list and change all occurrences of lenny to squeeze. A quick vi macro if you use it would be %s/lenny/squeeze/g. Once finished, you file should look similar to the one below. # main repo deb http://ftp.debian.org/debian/squeeze main deb-src http://ftp.debian.org/debian/squeeze main deb http://security.debian.org/ squeeze /updates main deb-src http://security .debian.org/ squeeze /updates main Next we'll update...
  3. How To Secure cPanel After Install

    Secure cPanel Introduction This guide is intended to give some basic steps to Secure cPanel after the initial installation. Please see our Initial Setup Guide if you have not already completed it. Tweak cPanel Settings Under Main » Server Configuration » Tweak Settings, enable (E) or disable (D) the following options: Prevent users from parking/adding on common internet domains. (E) Attempt to prevent pop3 connection floods (E) Default catch-all/default address behavior for new accounts (Blackhole) Use jailshell as the default shell for all new accounts and modified accounts (E) Always redirect users to the...
  4. How To Use DD Over Netcat Vs SSH

    dd is a very handy shell command for writing raw data blocks from one place to another. Since it can read directly from raw device files, it is very useful for copying entire partitions or drives from one location to another. One traditional way to get this drive data from one location to another is to pipe DD's output stream over SSH to a shell on a remote machine which in turn uses dd to pipe it to...
  5. ImageMagick [Imagick] PHP Class Broken Or Fails To Install

    Introduction to Imagick Some versions of CentOS (including the most recent 5.5) have an issue with a buggy 6.4.8 RPM version of ImageMagick. This version prevents the Imagick PHP class from working properly, and also prevents the extension from being installed via PECL. If you are using this PHP class on your site, you will see an error something like: Fatal error: Class 'Imagick' not found in /home/user/public_html/file.php on line 92 When trying to install via PECL, the error will be: ... make: *** [imagick_helpers.lo]...