Xvfb is a virtual frame buffer suitable for headless linux servers having no physical hardware like graphics card or monitor. I was trying to install Xvfb and i have a countless problems with my centos server.

Installing Xvfb

yum install Xvfb

When i try to run the Xvfb to start a virtual frame …

If you are struggling to install KDE (KDE desktop environment) an x window system here is a simple commandline.

All you have to do is

yum groupinstall “X Window System” “KDE (K Desktop Environment)”

If you want to install in Debian/Ubuntu

apt-get install kde

Thats it!

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Xvnc or vnc server is a free linux based virtual monitor. Suppose you are running a linux server without monitor and graphics card but you want to render images. so we use virtual environment like vnc or Xvfb.

To install Xvnc

yum install vnc-server

Then

Xvnc -screen 800x600x32 :

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i was getting this message from vbulletin after logging as administrator. I wasnt able to find the setting in vbulletin control panel that would disable this 180 day password, until i finally figured out.

Your password is 180 days old, and has therefore expired.

Please change your password using this page.

To fix …

If you are buying a new vps or dedicated server you might install DNS server, LAMP and mail server. But if you want to upload php scripts or html files then ftp is a much for easy uploading or downloading the files in the server.

There are 3 popular open source …

Setup Basic POP3/IMAP Mail Server in Centos/RHEL

Setting up a mail server can be quite initimidating if you are linux beginner.
I am posting here my simple and most basic mail server experiment which i conducted
with my VPS server so that my documentation could be helpful for those who want
to setup …

i was trying to compile the courier-imap and during make i was getting this error “ exec: g++: not found”

exec: g++: not found

i fixed it by installing gcc-c++ in my centos

yum install gcc-c++

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I was trying to compile the courier authentication library and while compiling i was getting this weird error

“Cannot find either the gdbm or the db library. “

Since i was using centos 4, i noticed that gdbm or berkeley db was needed and i just installed the packages of gdbm

yum …

i had a weird problem. i just cant find the error_log file of apache in /var/log. where is error log file of apache (httpd) located in cpanel? i have cpanel running on the centos server and somehow managed to locate the error_log in different directory

/etc/httpd/logs/error_log

or the short way of …

i was into a mess by accidentally deleting /etc/named.conf in my dedicated server running centos 5. Sooner i did that all my sites went down. I was in a terrible situation.

For those of you who did that i am documenting here how to restore the file!

Go to Cpanel WHM …