Eror install

Hello,

VERSION="20.04.4 LTS (Focal Fossa)"

I keep getting error while installing

Software Requirements
Updated Ubuntu 20.04
A user with sudo privileges
Python 3.6+
Node.js 12
Redis 5
MariaDB 10.3.x / Postgres 9.5.x
yarn 1.12+
pip 20+
wkhtmltopdf (version 0.12.5 with patched qt)
cron
NGINX

I installed them all without any problem and I get the following error

erpnext@erpsoft:~$ bench new-site erp.test.com
WARN: Command not being executed in bench directory
Usage: bench [OPTIONS] COMMAND [ARGS]...
Try "bench --help" for help.

Error: No such command "new-site".
erpnext@erpsoft:~$