Posts Tagged ‘possible solution’

How to install GNOME server on Ubuntu 10.04.2 LTS Lucid

Wednesday, April 20th, 2011

Reading Time: < 1minute
After some upgrades of Ubuntu from 9.10 to Ubuntu 10.04.2, I faced problems during apt-get upgrade && apt-get dist-upgrade

I had to fix it up with apt-get upgrade -f , however the “fix” which was targetting a fix up to the apt-get dist-upgrade removed about 260 packages, among which were the grub boot loader , xorg-server and even gnome

As in order to fix the package mishap the apt-get update -f was my only possible solution I went by and confirmed that I would like to wipe out all the packages.

Logically afterwards it was required that I install my missing xorg-server and gnome in order to make the Ubuntu desktop work again.

Here is how:

ubuntu:~# apt-get update && apt-get xorg-server ubuntu-desktop

The ubuntu-desktop is a meta package which installs the GNOME environment.

Possible way to Improve wordpress performance with wp-config.php 4 config variables

Tuesday, March 6th, 2012

Reading Time: 2minutes

Wordpress improve performance wp-config.php logo chromium effect GIMP

Nowdays WordPress is ran by million of blogs and websites all around the net. I myself run wordpress for this blog in general wordpress behaves quite well in terms of performance. However as with time the visitors tend to increase, on frequently updated websites or blogs. As a consequence, the blog / website performance slowly starts to decrease as result of the MySQL server read / write operations creating I/O and CPU load overheads. Buying a new hardware and migrating the wordpress database is a possible solution, however for many small or middle size wordpress blogs en sites like mine this is not easy task. Getting a dedicated server or simply upgrading your home server hardware is expensive and time consuming process… In my efforts to maximize my hardware utilization and increase my blog decaying performance I've stumbled on the article Optimize WordPress performance with wp-config.php

According to the article there are 4 simple wp-config.php config directvies useful in decreasing a lot of queries to the MySQL server issued with each blog visitor.

define('TEMPLATEPATH', '/var/www/blog/wp-content/themes/default');
define('STYLESHEETPATH', '/var/www/blog/wp-content/themes/default');

1. WP_HOME and WP_SITEURL wp-config.php directvies

The WP_HOME and WP_SITEURL variables are used to hard-code the address of the wordpress blog or site url, so wordpress doesn't have to check everytime in the database on every user request to know it is own URL address.


This variables will surely improve performance to Wodpress blogs which doesn't implement caching. On wp install with enabled caching plugins like WordPress Super Cache, Hyper Cache or WordPress Db Cache is used, I don't know if this variables will have performance impact …

So far I have tested the vars on a couple of wordpress based installs with caching enabled and even on them it seems the pages load faster than before, but I cannot say this for sure as I did not check the site loading time in advance before hardcoding the vars.

Anyways even if the suggested variables couldn't make positive impact on performance, having the four variables in wp-config.php is a good practice for blogs or websites which are looking for extra clarity.
For multiple wordpress installations living on the same server, having defined the 4 vars in different wordpress seems like a good idea too.

How to change GNOME Resolution with a command using terminal or console on Debian GNU / Linux and FreeBSD

Friday, January 6th, 2012

Reading Time: 3minutes

I'm testing some old school arcade games, available from Debian's package repositories and quitting one of the games ended me up with a GNOME Screen Resolution of 640×480 pixels.

I wanted to revert back to the Classics resolution, so what I would normally do to do that is use >GNOME menus:

System -> Preferences -> Monitors

In that huge screen resolution on my 14 inch lenovo notebook screen, however the System menu cannot fit in 640×480 resolution. You can see the non-screen fitting System on the screenshot below:

Screenshot Debian GNU / Linux Squeeze GNOME Desktop 640x480

Having this situation, I needed a way to change back to my normal daily used 1024x768px screen resolution to continue my daily work by some other way.
One possible solution I thought of was Logging Off Gnome and logging again. Loggig off and log on again would usually restart the initiated GNOME session and therefore will reset the screen resolution to my default 1024×768 / 32 bit color.

Having the unobservable System gnome panel menu on my screen however made using the usual Log off procedure via System -> Log Out myusername impossible…

Another possible way to actually restart my screen and hence revert back to my original resolution is achiavable using the classical restart X server key switch CTRL + ALT + backspace (bckspc) . Though this was a possible approach to the situation, I had a bunch of programs already running on my desktop and I did not wanted to interrupt my desktop session, what I was looking for is simply change the screen resolution size .

With all said I had to look up for alternative way (preferably easy) way, to revert back my screen resolution to my desired 1024×768.

As a console guy, I was interested if there is some kind of possibility to change my GNOME resolution directly using xterm or gnome-terminal , after a bit of check up online, I've found few threads started by people who were looking just like me for a way to change GNOME / KDE screen resolution size on various distributions Linux desktops as well on Free/Net/Open/BSDs. The answer to the question on few places was the command xrandr which I had used some few years ago to initiate remote X server connections via SSH

xrandr is actually a great tool part of the x11-xserver-utils

Actually xrandr is capable of doing a few things besides setting the screen resolution size, just to name a few it supports change the screen orientation, reflection of the output of the screen, adjust brightness, set color gamma etc. etc.

It is good to mention that xrandr changes the resolution not on a GNOME level but on Xorg server level.

Using xrandr to change the screen resolution appeared to be very easy.

1. First I issued xrandr to check all the supported xrandr resolutions by my X server hipo@noah:~/Desktop$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192VGA1 disconnected (normal left inverted right x axis y axis)LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 304mm x 228mm 1024x768 60.0*+ 50.0 800x600 60.3 56.2 640x480 60.0 59.9 TV1 disconnected (normal left inverted right x axis y axis)hipo@noah:~/Desktop$

From the output you can see I have 3 basic resolutions configured in my Xorg, I can switch between.

2. To switch to my previous default screen resolution

hipo@noah:~/Desktop$ xrandr -s 1024x768

After using xrandr command to revert back to my default screen size, I realized there is two other (partially command line partially gui) way to change to 1024×768 pixels.3. Through launching gnome Control Center and searching for Monitors menu.

If one prefers this way he can;

i) press ALT+F2 to invoke Gnome's Run Application dialog

ii) issue gnome-control-center command:

GNOME run application Dialog GNOME Control Center cmd debian GNU / Linux

GNOME Control Center search Monitors menu debian GNU / Linux

4. By invoking gnome's Control Panel -> Monitors settings window by a command

hipo@noah:~/Desktop$ gnome-display-properties

GNOME display properties command to launch monitors screen resolution settings