Installation problem appearing

I am trying to install frappe bench on my ubuntu server but struggling alot not able to install bencI am trying to install frappe bench on my ubuntu server but struggling alot not able to install bench, sometimes python error comes sometimes other errors

format your server and follow this step by step

stucked at step 1.4 it asks that enter user name in correct method

sudo adduser your_frappe_user
usermod -aG sudo your_frappe_user
su your_frappe_user
cd /home/your_frappe_user

then complete your installation