sudo add-apt-repository ppa:atareao/atareao
sudo apt-get update
sudo apt-get install touchpad-indicator

After installation, open the indicator from Applications -> Accessories -> Touchpad Indicator and set your touchpad in top-right

This is the easiest way to disable keywords.

(I’m using ubuntu so that codes listed below works for only ubuntu servers.)

1.  Using a Php Accelerator

I found apc. There are some such as Xcache and eAccelerator. Apc is creating php files cache. Before install it, you can test your apache performanse with ab.

ab -c5 -n100 http://www.yoursite.com/index.php
-c concurrency
Number of multiple requests to perform at a time. Default is one
request at a time.

-n requests
Number of requests to perform for the benchmarking session. The
default is to just perform a single request which usually leads
to non-representative benchmarking results.

After testing you can easily install apc with typing:

sudo apt-get install php-apc

sudo service apache2 restart

Than test again.

ab -c5 -n100 http://www.yoursite.com/index.php

You can see the difference. Apc comes with a simple control script in /usr/share/doc/php-apc/apc.php.gz to use it

gunzip /usr/share/doc/php-apc/apc.php.gz
cp /usr/share/doc/php-apc/apc.php /yousites.com/apc.php

2. Enable browser caching with apache2

Firstly to check browser caching, install firebug (ff extension) http://getfirebug.com/. After that open firebug and click network tab (Net). Than refresh your web page. You can see get process for each file in your webpage (js,png,gif,ico). There is a green bar symbolizing connection. If you are using browser caching this green bar should be “0″ after second reload of page. If not

enable expires module of apache2

sudo a2enmod expires

restart apache

sudo service apache2 restart

Add this line to your .htaccess file

ExpiresActive on
ExpiresByType application/javascript “access plus 1 months”
ExpiresByType image/jpg “access plus 1 month”
ExpiresByType image/jpeg “access plus 1 month”
ExpiresByType image/gif “access plus 1 month”
ExpiresByType image/png “access plus 1 month”
ExpiresByType text/css “access plus 1 months”

access plus means access time for each visitor. Also you can use your website .conf file to use it.

A: Delete them from /boot directory. Both initrd and vmlinuz files. Than run update-grub.

Q: How to hide recovery mode in grub2 menu ?

A: Change this line #GRUB_DISABLE_LINUX_RECOVERY=”true” as GRUB_DISABLE_LINUX_RECOVERY=”true” (delete command character.) in /etc/default/boot. Than run update-grub.

Q: How to disable memtest in grub2 menu ?

cd /etc/grub.d

sudo chmod -x 20_memtest86+

update grub

Some other changes in grub menu. In /etc/grub.d there are 6 executable files. These are

• 00_header Sets initial appearance items such as the graphics mode, default selection, timeout, etc. These settings are normally imported from information from /etc/default/grub. Users normally do not need to make changes to this file.
• 05_debian_theme The settings in this file set splash image, text colors, selection highlighting and themes. In the absence of a splash image, this file sets a monochromatic theme for the initial menu display. How to set font renderings and splash images are discussed in detail in the Splash Images and Themes section.
• 10_hurd Locates Hurd kernels. Not currently used.
• 10_linux Locates kernels on the root device for the operating system currently in use. It takes this information and establishes the names displayed on the menu for these kernels. Thanks to the code in 10_linux, it is not necessary (or even possible) to explicitly contruct the list of kernel names displayed on the menu. Note: If you don’t want all your old kernels to appear in the menu list, remove their files from /boot.
• 20_memtest86+ Searches for /boot/memtest86+.bin and includes it as an option on the GRUB 2 boot menu. There is currently no line option to remove this entry from the menu. The display of memtest86+ can be inhibited by removing the executable bit from this file: sudo chmod -x /etc/grub.d/20_memtest86+ and then running sudo update-grub.
• 30_os-prober This file uses os-prober, which searches for Linux and other operating systems. Results are placed in grub.cfg based on the scripts in this file. The file is divided into 4 sections, representing the types of operating systems handled by the scripts: Windows, Linux, OSX, and Hurd. Variables in this file determine the format of the displayed names in /boot/grub/grub.cfg and on the GRUB 2 menu. Users familiar with basic scripting can alter these variables to change the format of the displayed menu entries. Alternatively, the user can insert an entry into /etc/default/grub which disables this script. (See below)
• 40_custom A template for adding custom menu entries which will be inserted into grub.cfg upon execution of the update-grub command. The contents of this file, below the “exec tail -n +3 $0” line and the default comments, are imported directly into /boot/grub/grub.cfg without any changes.

By setting executables bits of these file “0″,  you can disable function of file for grub menu. Forexample, if you want to disable memtest in grub2 menu, just set “0″ to executable bit of 20_memtest86. sudo chmod -x 20_memtest86+ than update-grub. To make it enable set “1″ sudo chmod +x 20_memtest86+ and update-grub.

first

sudo cat /etc/lsb-release

second

sudo cat /etc/issue

• Opened new group
• Created new user
• Changed user group
• Check user group is true
• Giving ssh access to user
• Restarting sshd

Lets firstly add a user in Ubuntu

sudo adduser USERNAME

Create new group in Ubuntu

sudo addgroup GROUPNAME

Change user group, you can do it with two way. You can edit file or delete user and add again with group

sudo vi /etc/group

change

GROUPNAME:x:1002:USERNAME

or delete user and add again

sudo userdel USERNAME
sudo useradd USERNAME -g GROUPNAME

Check user group or learn user group in Ubuntu

id USERNAME

Give ssh access to a user in Ubuntu

sudo vi /etc/ssh/sshd_config

change

AllowUsers alonon OTHERUSERNAME NEWUSERNAME

than

sudo service ssh restart

Also you can delete a user in ubuntu with

sudo userdel USERNAME

Group delete in Ubuntu

sudo groupdel GROUPNAME

]]> http://www.alonon.net/user-groups-and-users-in-ubuntu/feed/ 0 http://www.alonon.net/apt-get-commands-cheat-sheet/ http://www.alonon.net/apt-get-commands-cheat-sheet/#comments Mon, 15 Mar 2010 21:47:48 +0000 ALonon http://www.alonon.net/?p=210 Read more →]]> some apt-get commands

Here is quick cheat sheet you will find handy while using apt-get at shell prompt:

Syntax	Description	Example(s)
apt-get install {package}	Install the new package. If package is installed then try to upgrade to latest version	apt-get install zip apt-get install lsof samba mysql-client
apt-get remove {package}	Remove/Delete an installed package except configuration files	apt-get remove zip
apt-get –purge remove {package}	Remove/Delete everything including configuration files	apt-get –purge remove mysql-server
apt-get update apt-get upgrade	Resynchronize the package index files and Upgrade the Debian Linux system including security update (Internet access required)	apt-get update apt-get upgrade
apt-get update apt-get dist-upgrade	Usually use to upgrade to Debian distribution. For example Woody to Sarge upgrade. ‘dist-upgrade’ in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages; apt-get has a “smart” conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary.	apt-get update apt-get dist-upgrade

]]> http://www.alonon.net/apt-get-commands-cheat-sheet/feed/ 0 http://www.alonon.net/ubuntu-9-10-karmic-koala-released%e2%80%8e/ http://www.alonon.net/ubuntu-9-10-karmic-koala-released%e2%80%8e/#comments Sat, 31 Oct 2009 16:16:52 +0000 ALonon http://www.alonon.net/?p=162 Read more →]]> Ubuntu 9.10 has released, it has some new faetures, i shared a few of them. For more

Store, sync and share


Integrated “Ubuntu One” technology gives you 2 GB of online storage for free. Easily share files between your own and your friends’ computers. Upgrade at low cost for more storage if you need it.


Software Center

Instant access to thousands of free and open-source applications

Categories include: Education, Games, Sound and Video, Graphics, Programming and Office.

Simply select the applications you want to use and the Software Center will add them to your computer

No CDs, no licenses, no hassle.

Download Ubuntu 9.10

• Bittorent links (64 bit) and 32 bit
• Direct ISO CD Images 32 bit
• Direct ISO CD Images 64 bit
• Mirror list
]]> http://www.alonon.net/ubuntu-9-10-karmic-koala-released%e2%80%8e/feed/ 0 http://www.alonon.net/dns-cache-with-dnsmasq/ http://www.alonon.net/dns-cache-with-dnsmasq/#comments Sat, 05 Sep 2009 20:24:11 +0000 ALonon http://www.alonon.net/?p=137 Read more →]]> To make a faster browsing , you can use dns cache.

To understand why you should use dns cache, you should learn how dns works.



With the each client request, dns try to find ip address for domain. Forexample for each you type www.google.com, your browser try to find google.com ips again. Dns cache is hold this ip in local, so you can access faster.

I’m using dnsmasq , to install in ubuntu.

“sudo apt-get install dnsmasq”

to configure (i’m using static ip, if you are using a dynamic ip more configuration might have to be done. )

open /etc/dhcp3/dhclient.conf

“vi /etc/dhcp3/dhclient.conf”

change

#prepend domain-name-servers 127.0.0.1;

with

prepend domain-name-servers 127.0.0.1;

Example:

dig ebay.com

; <<>> DiG 9.5.1-P2 <<>> ebay.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45431
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;ebay.com.            IN    A

;; ANSWER SECTION:
ebay.com.        2330    IN    A    66.211.160.88
ebay.com.        2330    IN    A    66.135.205.13
ebay.com.        2330    IN    A    66.135.205.14
ebay.com.        2330    IN    A    66.135.221.10
ebay.com.        2330    IN    A    66.135.221.11
ebay.com.        2330    IN    A    66.211.160.87

;; Query time: 140 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Sep  5 23:21:51 2009
;; MSG SIZE  rcvd: 122

After dns cache:

dig ebay.com

; <<>> DiG 9.5.1-P2 <<>> ebay.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17990
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;ebay.com.            IN    A

;; ANSWER SECTION:
ebay.com.        2327    IN    A    66.211.160.87
ebay.com.        2327    IN    A    66.135.221.11
ebay.com.        2327    IN    A    66.135.221.10
ebay.com.        2327    IN    A    66.135.205.14
ebay.com.        2327    IN    A    66.135.205.13
ebay.com.        2327    IN    A    66.211.160.88

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Sep  5 23:21:54 2009
;; MSG SIZE  rcvd: 122




]]> http://www.alonon.net/dns-cache-with-dnsmasq/feed/ 0 http://www.alonon.net/install-php-apache-mysql-phpmyadmin/ http://www.alonon.net/install-php-apache-mysql-phpmyadmin/#comments Thu, 01 Jan 2009 08:32:59 +0000 ALonon http://www.alonon.net/?p=30 On ubuntu and kubuntu systems you can install php5 apache2 mysql and phpmyadmin with this command

sudo apt-get install apache2 php5 php5-mysql php5-gd mysql-server phpmyadmin

To enable mod_rewrite run this:

sudo ln -sfn /etc/apache2/mods-available/rewrite.load /etc/apache2/mods-enabled/
sudo /etc/init.d/apache2 restart

]]> http://www.alonon.net/install-php-apache-mysql-phpmyadmin/feed/ 3