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What are the requirements?

Server
PHP 5+
Mysql

PHP Extensions
gettext
zip
curl
gd
imagick
mysqli
mod_headers
mod_rewrite
mod_deflate
mod_expires

PHP Settings  
Required  Recommended
session   YesYes
shell_exec NoYes
allow_url_fopen YesYes
file_uploads YesYes
max_execution_time 60300
max_input_time 60300
max_input_vars No5000
memory_limit 128M512M
post_max_size NoMax upload size
upload_max_filesize NoMax upload size
set_time_limit NoYes

Multiresolution (optional)
Debian/Ubuntu OS
python3 
python3-pil 
python3-numpy 
python3-pip 
hugin-tools 
pyshtools

Video 360 Tour 
python3

Gallery Video Slideshow 
ruby 
ruby-fastimage