1.
I want to create the password file /var/www/www.example.com/.htpasswd now and store the user falko in it (you can give the password file any name you like - it's not necessary to name it .htpasswd; I just named it .htpasswd because that's the way password files are named under Apache):

htpasswd -c /etc/nginx/.htpasswd-users admin



2.
How to install PHP GB on Ubuntu using apt-get, specifically php5-gd.

To install PHP GD on Ubuntu enter the following command:
sudo apt-get install php5-gd

If your web server setup is in order, only install the php gd extension and restart php scripting interpreter and web server.

service php5-fpm restart


3.
To install MySQL, run the following command from a terminal prompt:

sudo apt-get install mysql-server
sudo apt-get install php5-mysql (MySQL Module for PHP)

service php5-fpm restart

Adjusting child processes for PHP-FPM (Nginx)

vi /etc/php5/fpm/pool.d/www.conf

pm.max_children = 200
pm.start_servers = 10
pm.min_spare_servers = 5
pm.max_spare_servers = 35

slowlog = /var/log/slow-$pool.log.slow
request_slowlog_timeout = 5s

4.

The simplest way to make backup is to run Drush command inside drupal root.

$ cd /var/www/example.com $ drush archive-dump --destination=/var/backup/example.com.tar.gz Archive saved to /var/backup/example.com.tar.gz                             

5. mysql

cd /etc/mysql/conf.d#

vi custom.cnf

add content

[mysqld]
query_cache_size        = 1524M
sort_buffer_size        = 20M
read_rnd_buffer_size    = 1M
join_buffer_size        = 20M
table_cache             = 1024
innodb_buffer_pool_size = 512M

 7. php

vi /etc/php5/fpm/php.ini

memory_limit = 188M

error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT

8. install apc

sudo apt-get install php-apc

:/etc/php5/fpm/conf.d# vi apc.ini

extension=apc.so
apc.shm_size=80M

9. install memcache

https://drupal.org/node/1131468

cd /etc/php5/fpm/conf.d

vi memcache.ini

extension=memcache.so

10. curl

sudo apt-get install curl libcurl3 libcurl3-dev php5-curl