How To : Secure GRUB Boot Loader

GRUB, no doubt is the most widely used Boot Loader on Linux. So, a system's security is incomplete until its Boot Loader is secure. The common way to secure GRUB is, “password”. But, a “cunning” attacker can by-pass this security also and may gain access to your system, if password is NOT applied correctly to the “grub.conf” entries.

The main reasons to Password Protect the GRUB Boot Loader are:

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Tech Tip: Convert MP3 files to WAV in Linux

Although MP3 is the most commonly used format for the audio files around the world, but sometimes there are circumstances where we need a WAV format for a application, for example “Kalarm”. Now, this can be simply accomplished using “mpg321” utility. If your system does not have this utility installed, then it can be easily installed with YUM or APT-GET …

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How-To : Block Anonymous Proxy sites in SQUID

Just configuring the proxy/squid and blocking few popularly known sites from your network is not just enough, because there are thousands of active anonymous proxy sites on the net, that your users can use to by-pass your proxy rules.

I too face this problem, when I configured proxy in my network using squid. I thought this is it, but to …

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How-To : Configure chroot/jailed DNS Server in Solaris 10

Currently my DNS server was running on Solaris 8, so when we upgraded our environment to Solaris 10, there was a need to migrate existing DNS setup to new version of Solaris, i.e Solaris 10, along with new version of BIND 9. As Solaris 10 has changed a lot in comparison to Solaris 8, so we have to do some …

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Upgrade Fedora with preupgrade

This article will help you to upgrade your currently installed version of Fedora, to the latest version or whichever higher version you want.
The main advantage of upgrading by this method is that, you can do your work simultaneously while the system is preparing for the upgrade.

Step 1: Become root

# su -

Step 2: Use “yum” to upgrade

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