Oct 22
How do I protect my yum repo’s packages from certain repositories getting replaced / updated via yum command itself under CentOS / RHEL / Redhat Enterprise Linux?
You need to install the yum-protectbase plugin package:
This plugin allows certain repositories to be protected. Packages in the protected repositories can’t be overridden by packages in non-protected repositories even if the non-protected repo has a later version.
Oct 22
How do I install memcached a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load under CentOS / RHEL / Fedora / Redhat Linux?
Memcached is very fast caching system for MySQL. It uses libevent or epoll (Linux runtime) to scale to any number of open connections and uses non-blocking network I/O.
Oct 22
I‘ve created a unique default group for each user and also used Linux groups to enhance security. Further a group called “users” allowed to login via ssh. However, I need to enforce password quality-control for all users. How do I create a password policy and enforce its use under CentOS or RHEL 5.x server operating systems?
Oct 22
I need Photoshop alternative under Ubuntu Linux for basic editing. I know Photoshop can be run using Wine but I’m not able to afford expensive software for just basic editing. Can you suggest a few free FOSS apps that works as alternatives to Photoshop under Ubuntu or Fedora Linux desktop operating systems?
The following is used for graphics purpose. If you are artist, illustrator, designer, business user, home user, photographer, or web designer you can use the following for image manipulation and they are similar to Adobe Photoshop, Corel Paint Shop Pro and Paint.NET software.
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Oct 23
I‘m not told to use the root user to perform activities that do not require it. I’ve configured sudo for myself and for other web developers so that they can restart MySQL or Apache web server. How do I send email when sudo run by one of my user? How do I keep track of user login done via sudo command?
sudo does greatly enhances the security of the system without sharing root password with other users and admins. sudo provides simple auditing and tracking features too.
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