Create user Ubuntu with the command and directory restriction

 Create User:

    sudo useradd -m user_name -s /bin/rbash

    sudo passwd user_name

    Enter password

Make Directory and grant permission  

    sudo mkdir /home/user_name/bin

    sudo chown root. /home/user_name/.profile

    sudo chmod 755 /home/user_name/.profile

Restrict Directory and access

sudo vim /home/user_name/.profile

################ADD BELOW IN FILE#######

# if running bash

if [ -n "$BASH_VERSION" ]; then

    # include .bashrc if it exists

    if [ -f "$HOME/.bashrc" ]; then

. "$HOME/.bashrc"

    fi

fi

# set PATH so it includes user's private bin if it exists

PATH=$HOME/bin

export PATH

#########################################

Assign Commands

sudo ln -s /bin/grep /home/user_name/bin/tail

sudo ln -s /bin/cat /home/user_name/bin/cat

sudo ln -s /bin/echo /home/user_name/bin/more