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To get firefox to play flash movies in ubuntu do the following. First make sure you have the adobe flash player installed:

aptitude install flashplugin-installer

This should enable flash in firefox after restarting firefox. One additional problem i had is due to compiz the flash movie player would show up in firefox. But pressing the play button had no effect. Do the following:

Edit the file: /usr/lib/nspluginwrapper/i386/linux/npviewer and add the following line:

export GDK_NATIVE_WINDOWS=1

Thats it have fun watching flash movies on ubuntu

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Dpkg is the Debian package manager dpkg is a tool to install, build, remove and manage Debian packages.

Now we will see all the available commands for dpkg with some examples

1)Install a package

Syntax

dpkg -i <.deb file name>

Example

dpkg -i courier-pop-ssl_0.61.2-1ubuntu2_amd64.deb

2)Install all packages recursively from a directory

Syntax

dpkg -R

Example

dpkg -R /usr/local/src

3)Unpack the package, but don’t configure it.

Syntax

dpkg --unpack package_file

If you use -R option is specified, package_file must refer to a directory instead.

Example

dpkg --unpack courier-pop-ssl_0.61.2-1ubuntu2_amd64.deb

4)Reconfigure an unpacked package

Syntax

dpkg --configure package

If -a is given instead of package, all unpacked but unconfigured packages are configured.

Example

dpkg --configure courier-pop-ssl_0.61.2-1ubuntu2_amd64.deb

5)Remove an installed package except configuration files

Syntax

dpkg -r

Example

dpkg -r courier-pop-ssl_0.61.2-1ubuntu2_amd64.deb

6)Remove an installed package including configuration files

Syntax

dpkg -P

If you use -a is given instead of a package name, then all packages unpacked, but marked to be removed or purged in file /var/lib/dpkg/status, are removed or purged, respectively.

Example

dpkg -P courier-pop-ssl

7)Replace available packages info

Syntax

dpkg --update-avail

With this option old information is replaced with the information in the Packages-file.

8)Merge with info from file

Syntax

dpkg --merge-avail

With this option old information is combined with information from Packages file.

The Packages file distributed with Debian is simply named Packages.dpkg keeps its record of available packages in /var/lib/dpkg/available.

9)Update dpkg and dselect’s idea of which packages are available with information from the package pack-age_file.

Syntax

dpkg -A package_file

10)Forget about uninstalled unavailable packages.

Syntax

dpkg --forget-old-unavail

11)Erase the existing information about what packages are available.

Syntax

dpkg --clear-avail

12)Searches for packages that have been installed only partially on your system.

Syntax

dpkg -C

13)Compare Package versions version numbers

Syntax

dpkg --compare-versions ver1 op ver2

14)Display a brief help message.

Syntax

dpkg --help

15)Display dpkg licence.

Syntax

dpkg --licence (or) dpkg --license

16)Display dpkg version information.

Syntax

dpkg --version

17)Build a deb package.

Syntax

dpkg -b directory [filename]

18)List contents of a deb package.

Syntax

dpkg -c filename

19)Show information about a package.

Syntax

dpkg -I filename [control-file]

20)List packages matching given pattern.

Syntax

dpkg -l package-name-pattern

Example

dpkg -l postfix

21)List all installed packages, along with package version and short description

Syntax

dpkg -l

22)Report status of specified package.

Syntax

dpkg -s package-name

Example

dpkg -s openssh-server

23)List files installed to your system from package.

Syntax

dpkg -L package-Name

Example

dpkg -L postfix

24)Search for a filename from installed packages.

Syntax

dpkg -S filename-search-pattern

Example

dpkg -S /usr/bin/cut

25)Display details about package

Syntax

dpkg -p package-name

Example

dpkg -p openssh-server

If you want more information about dpkg check “man dpkg”

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This is fairly simple stuff but it took me 15 minutes to solve because i was missing a package So i thought i would write a quick article here we go X11 forwarding with ssh. This should work on any Linux distribution unless ssh has been built without the support for X forwarding. Which as far as i know is uncommon.

1. Install xauth with your package manager for ubuntu/debian do

aptitude install xauth

2. Edit the sshd_config on the server you want to start the X program from

vi /etc/ssh/sshd_config

3. Add the following to your sshd_config file on the server

X11Forwarding yes

4. Restart the ssh server

/etc/init.d/ssh restart

5. Edit the ssh_config on the client (this could also be in your home directory under .ssh/config)

vi /etc/ssh/ssh_config

6. Add the following to your ssh_config file on the client

ForwardX11 yes

7. Connect to the server with ssh

ssh user@host

8. You can also use ssh -X user@host Which switches on X Forwarding for the single connection. We don’t need this option because we set it permanently in the ssh_config on the client.

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I have started using Suphp on some of our confixx servers. Suphp hast one big advantage over mod php it executes PHP scripts with the permissions of their owners. Which is extremely useful on multi domain servers. Otherwise you always have the problem that files uploaded via FTP have different permissions than files upload via http. For example plugins uploaded via the wordpress backend or photos via php gallery. One of the big downsides of Suphp for us is that you cannot use .htaccess files for mod rewrite and so on. This is were htscanner comes along this is the description. Allow one to use htaccess-like file to configure PHP. sounds good You need to perform the following steps to install htscanner on debian or ubuntu:

1. Download htscanner:

wget http://pecl.php.net/get/htscanner-0.9.0.tgz

2. Unpack the archive:

tar -xzvf htscanner-0.9.0.tgz

3. Install dependencies:

aptitude install php5-dev php-config

4. Change into the htscanner directory:

cd htscanner-0.9.0

5. run phpize

phpize

6. Configure htscanner

./configure --enable-htscanner

7. Then make and make install

make && make install

8. This should have installed htscanner at the end of the install you should see the install path.

9. Create a file to get the htscanner module loaded:

vi /etc/php5/cgi/conf.d/htscanner.ini

10. With the following content:

extension=htscanner.so

11. restart the Apache web server and you can use .htaccess files again.

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