Overview

This is our developer docs about Command useful in Ubuntu

Network

1. What ports are opened

   sudo netstat -ntlp | grep LISTEN
   

2. Download file from link

   wget url
   wget -P directory url
   wget -O directory/fileName url
   

User - Group

1. Add user

   sudo adduser username
   sudo usermod -aG group username
   

2. Add user to group and not need input password when use command with group

   sudo gpasswd -a $USER group
   

3. Remove user out of group

   gpasswd -d user group
   

   Note: User need logout, login again then config password will active