egrep command

Debian Linux: Upgrade v6.0.x Squeeze to v7.0.0 Wheezy

by on May 5, 2013 · 3 comments

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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iptables: Read a List of IP Address From File And Block

by on October 26, 2010 · 5 comments

How do I read a list of ip address (subnets) using a text file and block all of them using Linux iptables command?

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Linux Create A Bootable USB Pen

by on March 11, 2010 · 16 comments

How do I create a bootable USB pen drive to start my CentOS / Fedora Linux? How do I create a bootable USB flash pen for installation of Linux, and for creation of rescue and other special-purpose boot disks using command line options?

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Linux: Parse an IP Address

by on January 28, 2010 · 0 comments

How do I parse my Linux servers IP address using a Bash shell?

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FreeBSD: pkg_version: corrupted record (pkgdep line without argument), ignoring

by on May 24, 2009 · 0 comments

I’m using portmaster to manage my ports without external databases. However, when I run the try to run pkg_version -l ‘< ‘, I’m getting the following error: pkg_version: corrupted record (pkgdep line without argument), ignoring How do I fix this problem?

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Troubleshooting: Apache Webserver Will Not Restart / Start

by on February 5, 2009 · 1 comment

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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Linux SATA Drive is Being Displayed as /dev/hda Instead Of /dev/sda

by on November 18, 2008 · 5 comments

Q. My SATA drive is being displayed as /dev/hda instead of /dev/sda. How do I fix this problem and make sure I get /dev/sda and speed of SATA under Linux operating systems?

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