TechBytes » Tutorials

Not getting a package on Ubuntu?

Asim Zeeshan — Sat, 24 Jul 2010 19:00:58 +0000

If you are not getting a package on Ubunu using apt-get then chances are that it has not been updated in the /etc/apt/sources.list file

For example, the following should be there in the sources.list file if you are running Ubuntu 10.04 LTS (codename lucid)

## main & restricted repositories
deb http://us.archive.ubuntu.com/ubuntu/ lucid main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ lucid main restricted

deb http://security.ubuntu.com/ubuntu lucid-updates main restricted
deb-src http://security.ubuntu.com/ubuntu lucid-updates main restricted

deb http://security.ubuntu.com/ubuntu lucid-security main restricted
deb-src http://security.ubuntu.com/ubuntu lucid-security main restricted

## universe repositories - uncomment to enable
deb http://us.archive.ubuntu.com/ubuntu/ lucid universe
deb-src http://us.archive.ubuntu.com/ubuntu/ lucid universe

deb http://us.archive.ubuntu.com/ubuntu/ lucid-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ lucid-updates universe

deb http://security.ubuntu.com/ubuntu lucid-security universe
deb-src http://security.ubuntu.com/ubuntu lucid-security universe

How to install byte-unixBench on Ubuntu

Asim Zeeshan — Fri, 23 Jul 2010 17:34:57 +0000

From UnixBench project homepage:

UnixBench is the original BYTE UNIX benchmark suite, updated and revised by many people over the years.

The purpose of UnixBench is to provide a basic indicator of the performance of a Unix-like system; hence, multiple tests are used to test various aspects of the system’s performance. These test results are then compared to the scores from a baseline system to produce an index value, which is generally easier to handle than the raw scores. The entire set of index values is then combined to make an overall index for the system.

Some very simple graphics tests are included to measure the 2D and 3D graphics performance of the system.

Multi-CPU systems are handled. If your system has multiple CPUs, the default behaviour is to run the selected tests twice — once with one copy of each test program running at a time, and once with N copies, where N is the number of CPUs. This is designed to allow you to assess:

* the performance of your system when running a single task
* the performance of your system when running multiple tasks
* the gain from your system’s implementation of parallel processing

Do be aware that this is a system benchmark, not a CPU, RAM or disk benchmark. The results will depend not only on your hardware, but on your operating system, libraries, and even compiler.

First install required libraries for compilation :

apt-get install libx11-dev libgl1-mesa-dev libxext-dev perl  perl-modules make

Then get the unixbench and run it :

wget http://byte-unixbench.googlecode.com/files/unixbench-5.1.2.tar.gz
tar xvf unixbench-5.1.2.tar.gz
cd unixbench-5.1.2
./Run

Installing Lighttpd, PHP and MySQL on Ubuntu

Asim Zeeshan — Mon, 19 Jul 2010 13:22:38 +0000

On VPS, especially with challenging small memory limit (e.g. 64MB or 128MB) lighttpd is the best option instead of Apache. In this article I will show you how to do that. On a fresh box (which has no apache installed) type this to get lighttpd webserver installed

apt-get install lighttpd

Now install PHP5 CGI package and PHP5 command line package

apt-get install php5-cgi php5-cli

Edit the following file

nano /etc/php5/cgi/php.ini

and uncomment this line

cgi.fix_pathinfo = 1

Now enable fastcgi module

lighty-enable-mod fastcgi

Restart Lighttpd

/etc/init.d/lighttpd restart

You get the welcome page

Lets install MySQL 5.1 server and client

apt-get install mysql-server mysql-client

and optionally phpMyAdmin

apt-get install phpmyadmin

Now create a test page to see if phpinfo is all Ok

nano /var/www/info.php

Type in the following

PHP Depreciated errors on Ubuntu 10.04 LTS

Asim Zeeshan — Sun, 20 Jun 2010 20:01:51 +0000

If you have installed LAMP (Apache, MySQL and PHP on Ubuntu 10.04 LTS) then running this on SSH

php -v

would be giving you certain PHP Depreciated warning like these

root@sea:~# php -v
PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/cli/conf.d/idn.ini on line 1 in Unknown on line 0
PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/cli/conf.d/imagick.ini on line 1 in Unknown on line 0
PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/cli/conf.d/imap.ini on line 1 in Unknown on line 0
PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/cli/conf.d/mcrypt.ini on line 1 in Unknown on line 0
PHP 5.3.2-1ubuntu4 with Suhosin-Patch (cli) (built: Apr  9 2010 08:23:39)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

Its a noted bug with Ubuntu and changes may be pushed soon but to fix this just edit each of these files and replace comments starting with ‘#‘ to ‘;‘.

Install PHP5 ADOdb extension on Ubuntu

Asim Zeeshan — Sun, 30 May 2010 05:00:37 +0000

ADOdb library is a very good data abstraction layer for PHP. Installing a PHP extension enables the library to auto-detect this and give even better performance. To install this library on Ubuntu 10.04 LTS do this

apt-get install php5-adodb

Installing T1LIB on Ubuntu

Asim Zeeshan — Sat, 29 May 2010 05:00:43 +0000

I recently found out about T1LIB. But I had no clue how to install this. Lucky for me I am on Ubuntu and I have the ability to search for a package.

T1LIB is actually in the latest Ubuntu 10.04 LTS. You can install it by punching in the following command

apt-get install t1lib-bin

Build-Essentials in CentOS?

Asim Zeeshan — Fri, 28 May 2010 17:43:21 +0000

If you are like me, you may be doing this to install essential build libraries to compile something from source

# wrong method
yum install build-essential

Build essential is a Ubuntu / Debian package. On CentOS, you need to do this

yum groupinstall "Development Tools"

Warning: This will install all development tools approx 49 packages closing to 65MB

Installing PHP’s SSH2 extension on Ubuntu

Asim Zeeshan — Thu, 27 May 2010 16:18:45 +0000

On Ubuntu 10.04 LTS, Do this (there’s no need to do any compiling anymore)

apt-get install libssh2-1-dev libssh2-php

You can now test if PHP recognizes it’s new ssh2 extension by running:

php -m |grep ssh2

Don’t forget to restart Apache

service apache2 restart

How to solve ‘You do not have sufficient permissions to access this page.’ in WordPress

Asim Zeeshan — Thu, 08 Apr 2010 12:22:46 +0000

I have been getting the following error because I changed the database table prefix

You do not have sufficient permissions to access this page.

The cause of the problem is that you have changed the database prefixes but still, some of the word press config is tied down to the previous prefix (wp_ or something)

Just execute the following two queries

-- Replace 'prefix_' with your actual prefix
UPDATE `prefix_usermeta` SET `meta_key` = REPLACE( `meta_key` , 'wp_', 'prefix_' );

-- Replace 'prefix_' with your actual prefix
UPDATE `prefix_options` SET `option_name` = 'prefix_user_roles' WHERE `option_name` ='wp_user_roles' AND `blog_id` =0;

Fixing Pear ‘unsupported protocal’ error

Asim Zeeshan — Tue, 12 Jan 2010 07:00:58 +0000

Are you getting the following error while updating any package in pear?

pear.php.net is using a unsupported protocal – This should never happen.

I got this error right after I upgraded PHP from 5.2 to 5.9 (using CentOS-Testing repo). To resolve this situation, do this.

rm -fr /usr/share/pear/.channels

and then do this

pear update-channels

It should now give you the following output

Updating channel "doc.php.net"
Update of Channel "doc.php.net" succeeded
Updating channel "pear.php.net"
Update of Channel "pear.php.net" succeeded
Updating channel "pecl.php.net"
Update of Channel "pecl.php.net" succeeded

That’s it, your issue is resolved.

TechBytes » Tutorials

Not getting a package on Ubuntu?

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