netbox/docs/installation/Migrating-to-Python3

# Migration
Remove Python 2 packages
```no-highlight
# apt-get remove --purge -y python-dev python-pip
```

Install Python 3 packages
```no-highlight
# apt-get install -y python3 python3-dev python3-pip
```

Install Python Packages
```no-highlight
# cd /opt/netbox
# pip3 install -r requirements.txt
```

Gunicorn Update
```
# pip uninstall gunicorn
# pip3 install gunicorn
```

Re-install LDAP Module (Optional if using LDAP for auth)
```
sudo pip3 install django-auth-ldap
```