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install latest Darktable in Debian 8

September 17, 2015 in software, Web Server

install Darktable in Debian 8

There is an easy way to install darktable in Debian by issuing the command "sudo apt-get install Darktable" but this one will install an old version of Darktable.
If you need the latest stable one then you need to follow those steps:
open a terminal and type:

sudo apt-get update

sudo apt-get build-dep darktable

sudo apt-get install libglew-dev libcanberra-gtk-module mesa-opencl-icd mesa-utils-extra

Now go to the official website http://www.darktable.org/ and download Darktable. you should get a file with a name like darktable-x.x.x.tar.xz where x is the version of Darktable.

go to Downloads directory and extract that file.

cd ~/Downloads/

tar xvf darktable-1.6.8.tar.xz

now go into darktable directory and start the build process by typing:

cd darktable

./build.sh

Then issue the following command to install it.

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Install vmware player in Debian 8

September 17, 2015 in Web Server

Install vmware player in Debian 8

 

Download the installation files from vmware official site https://my.vmware.com/web/vmware/free#desktop_end_user_computing/vmware_workstation_player/ .

Now you should have a file like VMware-Player-12.0.0-2985596.x86_64.bundle.

open a terminal and execute it:

cd ~/Downloads/

chmod +x VMware-Player-12.0.0-2985596.x86_64.bundle

sudo ./VMware-Player-12.0.0-2985596.x86_64.bundle

This will bring up the installation dialog



You need to accept the agreement in order to continue. Take a look before you accept it.

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Install Thunderbird in Debian 8

September 17, 2015 in software, Web Server

Install Thunderbird in Debian 8

Lets begin by downloading Thunderbird.

Visit the official Thunderbird site https://www.mozilla.org/thunderbird/ and click on Download button.

This will download a file like thunderbird-xx.x.x.tar.bz2 where "x" is the current version of Thunderbird.

Lets move that file in /usr directory.

sudo mv ~/Downloads/thunderbird-xx.x.x.tar.bz2 /usr/

Go to /usr and decompress Thunderbird:

cd /usr

sudo tar xvf thunderbird-xx.x.x.tar.bz2

Remove the compressed file:

sudo rm thunderbird-xx.x.x.tar.bz2

lets create the launcher. Press the "Super Key" (this one is located on your keyboard between "ctrl" and "alt". In windows world is also called "Windows Key")

then type "main menu"

main_menu

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Install Filezilla in Debian 8

September 16, 2015 in Web Server

Install Filezilla in Debian 8

Lets begin by downloading Filezilla.

Visit the official Filezilla site https://filezilla-project.org/download.php?type=client and click on Download button.

This will download a file like FileZilla_x.xx.x_x86_64-linux-gnu.tar.bz2 where "x" is the current version of Filezilla.

Lets move that file in /usr directory.

sudo mv ~/Downloads/FileZilla_x.xx.x_x86_64-linux-gnu.tar.bz2 /usr

Go to /usr and decompress filezilla:

cd /usr

sudo tar xvf FileZilla_x.xx.x_x86_64-linux-gnu.tar.bz2

Remove the compressed file:

sudo rm FileZilla_x.xx.x_x86_64-linux-gnu.tar.bz2

lets create the launcher. Press the "Super Key" (this one is located on your keyboard between "ctrl" and "alt". In windows world is also called "Windows Key")

then type "main menu"

main_menu

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fstab in ubuntu

July 11, 2013 in Web Server

How to configure fstab in Ubuntu

what is fstab?

In fstab or FileSystemTABle,you will be able to find informations regarding all your mount points in your computer.

In other words is a list of disks and partitions and also include information regarding where they are mounted in your Operating System.

It maybe sounds a bit complicat right now but i think that you will be able to understand if you see an example.

I will post here an fstab file (you can find yours under /etc/fstab)

 

# <file system> <dir>         <type> <options>       <dump> <pass>
/dev/sda1         /                   ext4      defaults             1           1
/dev/sda2        /usr              ext4      defaults              1           1

/dev/sda4        /home         ext4       defaults             0            0
/dev/sda5         swap          swap    defaults              0           0
/dev/sdc1         /data2         ext4      defaults,auto     0           2
/dev/sdb1         /data            auto     defaults,auto     0           2

Lets check this table:

on the first column:

Here you can find informations regarding the hard drives and partitions. In this computer there are 3 Hard Drives sda1, sda2, sda3 . On the first hard drive the OS is installed and the other 2 hdds are there for some additional storage. The first hard drive is divided into partitions but the other hard drives are not in this example.

On the second column:

Here you can see where in your file system are mounted your hard drives and your partitions

On the third column:

You can specify here what is the file system of your partitions. Some of the options are: ext2, ext3, ext4, nfs, reiserfs, xfs, jfs, smbfs, iso9660, vfat, ntfs, swap, and auto. the auto   is my favourite because in that mode you let the O.S. decide what kind of file system is your partition. This is very useful for CD and DVD ROMS.

On the forth Column:

Here you can specify how the system will mount your drives and partitions. You can add more than 1 option with ","

auto -- file system will mount automatically at boot.

noauto -- the filesystem is mounted only when you want to mount it (you can the mount command)

exec -- allow the execution binaries that are on that partition (default).

noexec -- do not allow binaries to be executed on the filesystem.

ro -- mount the filesystem read only.

rw -- mount the filesystem read-write.

user -- permit any user to mount the filesystem

nouser -- only allow root to mount the filesystem (default).

suid -- allow the operation of suid, and sgid bits.

nosuid -- block the operation of suid, and sgid bits.

noatime -- do not update inode access times on the filesystem. Can help performance.

nodiratime -- do not update directory inode access times on the filesystem. Can help performance.

relatime -- update inode access times relative to modify or change time. Access time is only updated if the previous access time was earlier than the current modify or change time (similar to noatime, but doesn’t break mutt or other applications that need to know if a file has been read since the last time it was modified). Can help performance.

sync -- I/O should be done synchronously.

async -- I/O should be done asynchronously.

defaults -- this is the most used and it includes the default mount settings (equivalent to rw,suid,dev,exec,auto,nouser,async). I also like this one 😉

Fifth Column

This is where you tell to dump utility if it needs to be backuped or not. if its 0 the dump will ignore this one. if it is 1 the dump will include this drive in the backup process.

Sixth Column.

this is the priority on check disk and can be 0,1,2. the root file system must have 1 and that means high priority on check. the other can be 0 no check or 2 check after file system.

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Install Google Chrome in Ubuntu 13.04

April 28, 2013 in software, Web Server

Google Chrome in Ubuntu

Dependencies:

libdev0.

Download this package from here (right click and save link as…)and install it with Ubuntu Software Center or in Terminal:

navigate to the directory where the package is:

cd ~/Downloads

sudo dpkg -i libudev0_175-0ubuntu19_i386.deb

 

Install chrome:

 

Now just go to the following link:

http://www.google.com/chrome and download the chrome package.

then install it with Ubuntu Software center or from the Terminal like before.

Enjoy the Google Chrome

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Manage Cisco Switch / Router from Linux

April 14, 2013 in Services, Web Server

Connect your Cisco Switch / Router on Ubuntu

Requirements for Configure a Cisco device from Console port:

A Host machine with your preferred O.S. In this case I’m using an Ubuntu 12.04 LTS.

A serial port in your computer motherboard or a USB to RS232(Serial) Converter.

A text based terminal emulation (i use minicom in this example)

Its also useful to install a TFTP server on your machine if you want to copy file from or to your Cisco switch / Router. I choose to use the tftpd-hpa

Check for active Serial ports on Linux:

Before we proceed we need to check all the available Serial ports on your machine and write down the port name because we will need it for configuring minicom. Open a terminal and type :

 

dmesg |grep tty

output:

In my case i have a pl2303 USB to Serial Converter and the name of this device is "ttyUSB0″


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Apache load balancing and failover

October 5, 2012 in Web Server

Apache load balancing and failover with pound

What is server load balancing?

Load balancing is a way to split all the income requests, to more than 2 servers. You must have a load balancing when you have a lot of income requests that a server can not handle. If you have for example a web site with a lot of visitors that a single server will not be able to handle, you must split the traffic to 2 or more web servers.  In this tutorial i will use 2 web servers and a load balancing server to redirect the http request.

What is server failover?

If you have a web site in a web server and you want for example to close this server for maintenance reasons or if your server due to a technical reason stop operating, your website will be offline until you fix this problem! Fail over is a way to automatically redirect the incoming requests for your website to another web server.

In this tutorial you will find an easy way to load balancing and failover using pound. Pound is an open source reverse proxy that can handle load balancing and failover with a strong emphasis in security.

Lets say that you have a static ip (i will use a non-existing IP 145.47.82.256), a domain name (allaboutlinux.eu) for your website, a webserver (with internal IP 192.168.0.250) and a router (configured to redirect all the incoming requests for port 80 to 192.168.0.250). If you have all the above its easy to create a public website hosted on your webserver. But this server has no failover or load balancing since its a single server.

 

If you need failover and load balancing you will need one more server with a replica of your website and a server that will handle the load balancing and fail over. Lets start creating the Pound server!

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How to Host multiple Websites on Apache2

March 29, 2012 in Apache Configuration

How to Host multiple Websites on Apache2

Let’s say that we own 2 or more domain names (hostpage1.com and hostpage2.com). We also have 2 web pages (hostpage1 and hostpage2). But we have only 1 webserver and 1 public IP (for this example i will use local IP but it will be the same if you own a public static IP)

Setting up the Domain names.

First thing is to create an "A record" in the DNS of your Domain Names to point "www" to your public or local IP address of your Web Server. I use local DNS in this example. So i will point the "www" for both of my domain names to 192.168.0.31. So it will be something like that:

www.hostpage1.com --> 192.168.0.31

www.hostpage2.com --> 192.168.0.31

Read the rest of this entry →

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Install Apache web server in Ubuntu

February 15, 2012 in Apache

Install Apache web server in Ubuntu / Debian

What is apache?

Apache is the most popular web server on the internet. It is highly configurable with third party modules, can run under several Operating Systems including Ubuntu and its very secure and stable. That is why more than 50% of websites currently running on the internet have an Apache server behind them.

How to install Apache on Ubuntu 11.04

You can install Apache2 from the Terminal by using:

$> sudo apt-get install apache2

when the installation is finished Apache is up and running and you can test that by point your web browser to http://localhost/

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