Administrator

How to Block IP address of any country with iptables

Sometime it is necessary to block incoming connection or traffic from specific remote host. iptables is administration tool for IPv4 packet filtering and NAT under Linux kernel. Following tip will help you to block attacker or spammers IP address. Â The blocklist is create with an API I wrote and you can use wget to update [...]

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How to Install Elgg – An open, flexible social networking engine

Elgg is an open, flexible social networking engine, designed to run at the heart of any socially-aware application. Building on Elgg is easy, and because the engine handles common web application and social functionality for you, you can concentrate on developing your idea. Elgg is open source. That means, when you use Elgg, you have [...]

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How to Adjust Vista’s Visual Effects to Improve Performance

If Windows Vista is running slowly, you can speed it up by disabling up to 20 of itâ€™s visual effects: like the transparent glass look, the way menus open or close, or whether shadows are displayed. To adjust the visual effects: 1.Â Go to Start >> Control Panel >> Performance Information and Tools 2.Â Select [...]

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How to Install and Configure SAMBA in Ubuntu

Successfully networking your Ubuntu system with Windows clients involves providing and integrating with services common to Windows environments. Such services assist the sharing of data and information about the computers and users involved in the network, and may be classified under three major categories of functionality: File and Printer Sharing Services. Using the Server Message [...]

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How to Access The MySQL Command Line

MySQL has its own command line interpreter (CLI). You need to know how to access it to do very basic administration. You can access the MySQL CLI using the mysql command followed by the -u option for the username and -p, which tells MySQL to prompt for a password. Here user root gains access: [root@bigboy [...]

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How to Install Zimbra on Ubuntu

Zimbra Collaboration Suite (ZCS) 5.0 is a truly modern, innovative messaging and collaboration application. Zimbra is the leading open source solution for enterprise, service provider, education, and government environments; offering administrators and their end-users unmatched benefits. It’s no wonder Zimbra is a popular choice for today’s growing Mac and Linux email server base. Ajax based [...]

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Essential Linux Server Administrator Commands

Command Summary Use arp Command mostly used for checking existing Ethernet connectivity and IP address Most common use: arp This command should be used in conjunction with the ifconfig and route commands. It is mostly useful for me to check a network card and get the IP address quick. Obviously there are many more parameters, [...]

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An Introduction to Basic IPv4 Routing

All of the operations considered in this article are operations upon a router, whether that router is a Linux box or Cisco dedicated hardware or some other type of machine. In this chapter I consider the traditional methods of IPv4 routing as using static configurations that are manually input by the network administrator. 1.1 Traditional [...]

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Performance tuning tools: ps, top, sar, iostat, and vmstat

As a system administrator, part of your daily duties is to monitor systems for performance and to tune systems where necessary. While there are expensive software products and benchmarking tools that can hone a machine to optimum efficiency, there exist several basic tools within LinuxÂ® that permit the knowledgeable system administrator to gather information and [...]

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How to run a PHP script on cron

Lots of programmers like PHP for its ability to code and develop web applications fast. Code-debugging is a lot easier than with PERL or C. However, there is one thing a lot of developers are puzzled about, â€œHow to run PHP Scripts with crontab?â€ Cron is normally available on all Unix and Linux distributions; if [...]

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