Issue: You have tar, gzip and bzip2 working properly on your server. However, you are getting “CPAN.pm needs either the external programs tar, gzip and bzip2 installed. Can’t continue.” error message while installing a perl module using cpan. This article explains how to solve this problem.
 
Also, please refer to our previous article on How To Install Perl Modules using manual and cpan method.
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Around The Geek World is a monthly summary of interesting articles and news around the geek world with my brief comment.

• Linux-Unix cheat sheets – The ultimate collection – Scott Klarr has done an excellent job in putting together almost all the best Unix cheatsheets that you can find over the internet.



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Photo courtesy of Jamison Judd

This is a guest post written by SathiyaMoorthy.

Wakeonlan (wol) enables you to switch ON remote servers without physically accessing it. Wakeonlan sends magic packets to wake-on-LAN enabled ethernet adapters and motherboards to switch on remote computers.

By mistake, when you shutdown a system instead of rebooting, you can use Wakeonlan to power on the server remotely. Also, If you have a server that don’t need to be up and running 24×7, you can turn off and turn on the server remotely anytime you want.

This article gives a brief overview of Wake-On-LAN and instructions to set up Wakeonlan feature.
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Photo courtesy of roney

This is a guest post written by Eric Higgins.

We’ve come a long way since the very first instances of verbal and written communication. From the early stages of speech, along with the primitive use of symbols and pictures to convey messages to one another, we’ve evolved into a communications powerhouse. Data has never been transferred faster and communication has thus never been more sophisticated than it is right now.
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You can login to a remote Linux server without entering password in 3 simple steps using ssky-keygen and ssh-copy-id as explained in this article.

ssh-keygen creates the public and private keys. ssh-copy-id copies the local-host’s public key to the remote-host’s authorized_keys file. ssh-copy-id also assigns proper permission to the remote-host’s home, ~/.ssh, and ~/.ssh/authorized_keys.

This article also explains 3 minor annoyances of using ssh-copy-id and how to use ssh-copy-id along with ssh-agent.
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OMSA is a web based application to manage DELL PowerEdge Servers. Using OMSA you can perform proactive system monitoring, system diagnosis, troubleshoot hardware issues and configure RAID etc., You can also view and manage hardware’s embedded system management (ESM) log using OMSA.

This is an jumpstart guide that explains how to install Dell OMSA on Linux. I have also provided few screenshots of DELL OMSA web application.
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Starting from MySQL 5, when you execute show databases command, information_schema will be listed in the database list. information_schema is a virtual MySQL database that stores metadata information of all the MySQL databases.

Typically you will execute either DESCRIBE or SHOW commands to get the metadata information. However using the information_schema views, you can execute the standard select SQL command to get the metadata information. In this article, let us review few practical examples on how to use the information_schema database.
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