====== Linux installations ======
\\

===== RPM =====

==== Yum ====

=== Download packages without installing it ===

<code>yum install yum-plugin-downloadonly</code>

Then

<code>yum install --downloadonly --downloaddir=<directory> <package></code>

See : https://access.redhat.com/solutions/10154


==== RPM manipulation ====

=== View files inside an RPM file :===
<code>
rpm -qlp myrpmfile.rpm
</code>

=== View files of an already installed RPM: ===
<code>
rpm -ql packagename
</code>

=== To list all packages installed on the systel ===
<code>
rpm -qa
</code>

=== To list all packages related to the name glibc (for example):===
<code>
rpm -qa glibc
</code>

=== To know which package(s) provided a specific file:===

<code>
rpm -q --whatprovides /usr/lib/x86_64-redhat-linux5E/lib64/
</code>

==== Edit rpm ====

Sometime you will need to edit and rpm (for example, some guy who made the rpm inside your company made a mistake in versions and you cannot install the damn thing).
Get rpmrebuild from here :
http://rpmrebuild.sourceforge.net/

Install manually the rpmrebuild:
<code>
yum localinstall rpmrebuild-2.11-1.noarch.rpm
</code>

Then edit the rpm using :
<code>
rpmrebuild -e -p --notest-install myrpm.rpm
</code>

You will be able to edit spec (vim editor), then save changes to a new rpm. Enjoy !!
More info here : http://magazine.redhat.com/2007/12/04/hacking-rpms-with-rpmrebuild/

==== Sign rpm ====

source: http://linuxsysconfig.com/2013/04/create-a-yum-repository-with-custom-gpg-signed-packages/

===== Install Redmine =====

http://martin-denizet.com/install-redmine-2-5-x-git-subversion-ubuntu-14-04-apache2-rvm-passenger/ \\
From Martin DENIZET.

===== Install XFCE =====

On Redhat/CentOS (from EPEL) :
<code>
yum -y groupinstall Xfce
yum -y install xorg-x11-fonts-Type1 xorg-x11-fonts-misc
</code>
To launch, use :
<code>
/sbin/telinit 5
or
startxfce4
</code>

On ubuntu server :
<code>
apt-get install xfce4 xfce4-terminal
</code>
And to launch it :
<code>
startx
</code>

===== Ubuntu 12.04.3 on Via C7 VX855 =====

To install ubuntu 12.04.3 on a Via C7 VX855.
  * Download the x86 alternate cd iso. Do not use the mini iso (minimal image), it will freeze at repository check.
  * Use unetbootin and the iso to creat a bootable disk.
  * Boot on the USB key. (For my Wyse C90LE, I had to press P when starting. Del for the bios, with password Fireport)
  * When booting on the usb key, press F4 and choose a command line install.
  * Then choose install ubuntu.
  * Go through the process.
  * When system is installed, boot, login, and :

<code>
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install xfce4
sudo reboot
</code>
Then, at next login, login and launche XFCE :
<code>
startx
</code>
The system has already chosen the Chromium driver for the Via chipset.

Now, to activate sound, you have to install pulseaudio.
Then, you can install xfce4-desktop if you want.

===== Install dokuwiki on ubuntu/debian =====

Install apache2, php and dokuwiki :
<code>
sudo apt-get install apache2
sudo apt-get install php5 libapache2-mod-php5
cd /var/www/html
sudo tar xvzf dokuwiki-stable.tgz
sudo chown -R www-data dokuwiki-2013-12-08
sudo mv dokuwiki-2013-12-08 dokuwiki
</code>
Now update apache :
<code>
cd /etc/apache2/sites-available/
sudo vim dokuwiki.conf
</code>
Add the following
<code>
Alias /wiki0         /var/www/html/dokuwiki
<Directory /var/www/html/dokuwiki/>
        Options +FollowSymLinks
        AllowOverride All
        order allow,deny
        allow from all
</Directory>
</code>
Then add it to apache using :
<code>
sudo a2ensite dokuwiki 
service apache2 reload
</code>
You can start editing your dokuwiki at : localhost/dokuwiki/install.php

SEO :\\
   * Remove PHP sessions id : \\
Add ini_set('url_rewriter.tags', ''); to /conf/local.php file. \\
   * Set index to 2 h (admin -> config -> spam : 24*24*2)
   * Rewrite URL, (admin -> config) use internal dokuwiki mode, then enable slash usage instead of double dot, and to redirect all http:// to htttp://wwww. add in .htaccess :


<code>
## force http:// vers http://www.
RewriteEngine On
RewriteCond %{HTTP_HOST}  ^spheniscus.brennik.fr [nocase]
RewriteRule ^(.*)         http://www.spheniscus.brennik.fr/$1 [last,redirect=301]
</code>
   * Set doku.php as default index file, in .htaccess, add : DirectoryIndex doku.php

Then add robot.txt file like :
<code>
Sitemap: http://www.spheniscus.brennik.fr/sitemap.xml
User-agent: *
Disallow: /doku.php/software
Disallow: /doku.php/software/development
Disallow: /doku.php/software/algo
...
Allow: /doku.php/software
Allow: /doku.php/software/development/$
Allow: /doku.php/software/algo/$
Allow: /doku.php/software/image_and_video/$
Allow: /doku.php/software/shell_scripts/$
...
</code>
And sitemap.xml file like :
<code>
<?xml version="1.0" encoding="UTF-8"?>
<urlset
      xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">

<url>
  <loc>http://www.spheniscus.brennik.fr/doku.php</loc>
  <changefreq>monthly</changefreq>
  <priority>1.00</priority>
</url>
<url>
  <loc>http://www.spheniscus.brennik.fr/doku.php/start</loc>
  <changefreq>monthly</changefreq>
  <priority>1.00</priority>
</url>
<url>
  <loc>http://www.spheniscus.brennik.fr/doku.php/start/about</loc>
  <changefreq>monthly</changefreq>
  <priority>1.00</priority>
</url>
<url>
  <loc>http://www.spheniscus.brennik.fr/doku.php/start/external_links</loc>
  <changefreq>monthly</changefreq>
  <priority>1.00</priority>
</url>
...
</code>
   * To prevent indexing of revisions pages, add in (admin -> config) //Hide pages matching this regular expression from search, the sitemap and other automatic indexes// the value "?rev=" (with the quotes).