Linux basic commands dist - Ubuntu 16.04

problem-3.txt

# Add User Non-interactively without password
1. sudo adduser --disabled-password --gecos "" username

# Grant root access to the user so s/he can execute sudo without a password.
1. sudo visudo 
#After includedir /etc/sudoers.d  put-.
2. username ALL=(ALL) NOPASSWD: ALL

# Create a folder named .ssh in the user’s home directory.
1.  mkdir /home/username/.ssh

#  Create a blank file named id_rsa in the .ssh folder.
1. cd /home/username/.ssh
2. > id_rsa

# Change the file permission of id_rsa so that it can only be read by a user.
1. chmod u+r,g-r,o-r id_rsa

# Change the ownership of the user’s home directory (including all files and folders) to the user.
1. sudo chown -R user: group /home/user/dir/