CentOS is an abbreviation for Community Enterprise Operating System that aims to be compatible with its upstream source, Red Hat Enterprise Linux. CentOS 6 is the 6th major version of CentOS, which was released on July 10th, 2011.

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grub-install gives an error message I don't understand

I'm new to Linux, am using CentOS 6.3, and am attempting to install CentOS 5.8 ISO to a pen drive following instructions from here. My pen drive is /dev/sda and partition 1 is vfat. It's mounted on ...
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What is PAM (Pluggable Authentication Modules) in Linux?

What is PAM (Pluggable Authentication Modules) in Linux? I know it is used for authentication, but what good is this? How does it work? I am using CentOS 6.2.
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Always have to chown when adding new file? Centos 6

Whenever I upload a new file to my server, I have to chown -R apache:apache /dir in order for it to be accessible. Is there an easier way around this?
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Downloading multiple files with wget and handling parameters

How can I download multiple files using wget? I also want to rename the files. Here are the commands I'm running one by one (copy/paste on terminal): wget -c --load-cookies cookies.txt ...