OS

FreeBSD > Becoming super user (su) or enabling su access to user

The superuser is a privileged user with unrestricted access to all files and commands. The superuser has the special UID (user ID) 0. You need to become super user (root) only when tasks need root permissions. Here is how to become super user: 1) At shell prompt type su and […]

Get Hardware Information On Linux Using dmidecode Command

The tool dmidecode reads the system DMI table to display BIOS and hardware information of the server. Apart from getting current configuration of the system, you can also get information about maximum supported interface slots and memory capacity. dmidecodeis able to give information about the current RAM size on the […]

How to umount when the device is busy

You need to unmount a CD or you want to pack away the external drive but when you try to umount it you get the dreaded “device is busy” message. Wouldn’t it be great if Linux actually told you what was keeping the drive busy? Here we are in 2008, […]

renice command: Change the Priority of a Already Running Process

Q. I’d like alter / change the scheduling priority of running processes. How do I change the Priority of a already running process under CentOS Linux or any UNIX like operating systems? A. If you run CPU-bond processes you must use nice command used to start process with modified scheduling […]

How To Tail (View) Multiple Files on UNIX / Linux Console

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Vcards and mime types

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Installing mod_geoip For Apache2 On Fedora 9

This guide explains how to set up mod_geoip with Apache2 on a Fedora 9 system. mod_geoip looks up the IP address of the client end user. This allows you to redirect or block users based on their country. You can also use this technology for your OpenX (formerly known as […]

CSF Installation failed: LWP perl module (libwww-perl) missing

While installaing CSF firewall on a plain Linux server, you may notice the “LWP perl module” missing error message: # sh install.sh Configuring for OS Checking for perl modules failed You need to install the LWP perl module (libwww-perl) and then install csf The problem mostly occurs on a plain […]