# Installation guide for OxOffice Online v4 Community on CentOS 7

Please download and install the latest version of CentOS 7 (we recommend using Minimal edition), when operating system installation is done, please follow steps to upgrade your system, install required packages and OxOffice Online v4 Community (we recommend executing these commands as normal user, remove sudo prefix if you are excuting them as root user).
```Shell
sudo yum upgrade -y
sudo yum install vim net-tools unzip wget -y
cd /etc/yum.repos.d
sudo wget http://www.oxoffice.com.tw/rpm/el/oxool-community-v4-centos7.repo
sudo yum upgrade -y
sudo yum groupinstall "OxOOL Community Group" -y
```
Disable SELinux
```Bash
sudo vim /etc/selinux/config # You can choose any preferred text editor to edit this file
# Search "SELinux=enforcing" line, and change "enforcing" to "disabled" or "permissive" then save and quit
```
Configure firewalld and open the default 9980 port
```Bash
sudo firewall-cmd --zone=public --permanent --add-service=http
sudo firewall-cmd --zone=public --permanent --add-port=9980/tcp
sudo firewall-cmd --reload
```
Check if OxOOL Community edition starts normally
```Shell
sudo netstat -tlnp
```
You should get some results like this:
```Shell
tcp6     0    0    :::9980		      :::*   	LISTEN   644/oxool
```