There is a tool called siege which you can install quite easily.
sudo apt install siege -y # debian based systems sudo pacman -S siege # arch based systems sudo dnf install siege -y # redhat based systems
Once you have installed siege, the following commands can be used to load test:
siege https://example.com # Your website will be loaded with requests from 25 concurrent users (default config) siege -c50 https://example.com # 50 concurrent users siege -c50 -t500s https://example.com # 50 concurrent users and 500 seconds siege -C # See default configs cat $HOME/.siege/siege.conf # Usually where the config file is.
More info here: https://www.joedog.org/siege-manual/