Install WTorrent which is one of Web Interfaces of RTorrent on Ubuntu

1. wtorrent requires webserver( lighttpd or apache ), php, scgi module, sqlite, xmlrpc so install them

sudo apt-get install apache2 libapache2-mod-scgi php5 php5-sqlite libxmlrpc-c3

2. enable scgi module in apache

sudo a2enmod scgi

# a2dismod is to disable

a2enmod is the command which automatically create symbolic links for module_name.conf and module_name.load under mods-enabled from mods-available

3. add the following line to /etc/apache2/httpd.conf

SCGIMount /RPC2 127.0.0.1:5000

4. download wtorrent from http://www.wtorrent-project.org/trac/ and extract

unzip wtorrent.zip

5. move wtorrent to root of your webserver and and create necessary directory for wtorrent

mv wtorrent/ /var/www/

6. make sure necessary directories of wtorrent exist, torrents/, db/, tpl_c/ and conf/

mkdir /var/www/wtorrent/tpl_c/

7. change permission for wtorrent read and write usage

chmod -R 777 /var/www/wtorrent/

8. open install.php in your browser

http://localhost/wtorrent/install.php

9. delete install.php after proper installation

rm /var/www/wtorrent/install.php


Install VNC Server on Xubuntu

vino isn't integrated into xfce, which is same vnc server that gnome uses for remote desktop feature

1. install vino

sudo apt-get install vino

2. open the config window, totally as same as gnome's

vino-preferences

3. Application -> Settings -> Setting Manager -> Autostarted Apps -> Add -> Command:

/usr/lib/vino/vino-server

4. run vino-server from ssh session

export DISPLAY=:0


/usr/lib/vino/vino-server &


Map Remote Servers into the Space of the Local Apache Server with Authentication on Ubuntu

1. delete symbolic link of the default proxy.conf

sudo rm /etc/apache2/mods-enabled/proxy.conf

2. make another copy of proxy.conf in the same folder, mods-enabled

sudo cp /etc/apache2/mods-available/proxy.conf /etc/apache2/mods-enabled/proxy.conf

3. edit it

sudo vi /etc/apache2/mods-enabled/proxy.conf
--

ProxyVia On

ProxyPass /mirror/ http://address:port/
ProxyPassReverse /mirror/ http://address:port/

<Location /motion/>
AuthName "TITLE"
AuthType Basic
AuthUserFile /var/www/.htpasswd
require valid-user
</Location>

# ProxyPass causes a local request for the http://localhost/mirror/ to be internally converted into a proxy request to http://address:port/
# ProxyPassReverse provides location header on http adjusting which redirects http://localhost/mirror/sub/ to http://address:port/sub/ also

4. generate apache password file, /var/www/.htpasswd

sudo htpasswd -c /var/www/.htpasswd username


Convert Text to Hex on Linux

xxd creates a hex dump of a given file or standard input.


echo "something" | xxd -c 256 -ps


-c 256: 256 octets per line
-ps: plain style