scientific linux

How to perform a version upgrade with scientific linux

Submitted by sklav on Tue, 08/23/2011 - 23:36

Scientific Linux was designed so that an administrator can easily upgrade their computer between minor releases.
It is not required that administrators upgrade their release, because the security errata will be updated for all releases. But there are often features and/or packages included in later releases that were not available with the earlier releases.
Below is the steps, using yum, to change to the latest 6.x release.
These instructions are for updating between minor releases, such as from 6.0 to 6.1.

yum clean all

Selinux howto for the impatient

Submitted by sklav on Thu, 05/05/2011 - 00:27

But i find that in general when I setup a box I leave Selinux in permissive mode and then go threw the paces of connecting to every service i want running and all associated options so for example if you setup a website that makes use of scripts i would recommend you run them all and after completed and hopefully before you ever connect the box to the internet you run the steps below to create a policy module. I find that this has prevented me from having major issues and i get the benefits of Selinux.

To create a rule that pretty much allows all AVC denials:

Mysql Cheat Sheet for Grant Permissions

Submitted by sklav on Fri, 02/04/2011 - 11:11

An example of how to add SELECT privileges to a user using GRANT

GRANT SELECT ON projectdb.* TO user@'localhost' IDENTIFIED BY 'passwd';

If SELECT is not enough for our user we can add more privileges using a query similar to the one below:

An example of how to add a selection of privileges to a user using GRANT

GRANT SELECT, INSERT, DELETE ON projectdb.* TO user@'localhost' IDENTIFIED BY 'passwd';

If you want to GRANT ALL the privileges to a user then use this query:

An example of how to Grant Privileges in MySQL

High Quality Printing Centos 5

Submitted by sklav on Wed, 03/12/2008 - 11:50

Gutenprint supports a wide variety of Epson Stylus, HP DeskJet, Canon BubbleJet, Lexmark inkjet printers, PCL laser printers, and Canon, Fujifilm, Sony, Olympus dye sublimation printers. Its primary goal is uncompromising quality. Epson Stylus printers in particular are supported in all resolutions and modes, and the latest printers are capable of producing prints that rival photographic prints in quality. This package also offers much faster printing for high quality text and presentation graphics when required.