Docker - Bash: IP: command not found
Unfortunately, your link has been broken (or it might be inaccessible from Iran). Although there is not enough evidence of which Linux OS you are trying to use, a solution is provided as follow work under .deb (e.g. Ubuntu) and .rpm (e.g. Fedora) package managers.
At first, update the container's repository:Ubuntu:
apt-get updateCentOS:
yum updateFedora:
dnf updateSecondly, install net-tools package.Ubuntu:
apt-get install net-toolsCentOS:
yum install net-toolsFedora:
dnf install net-toolsLately, ifconfig has been replaced with ip command. So make sure to check both commands, some Linux distributions have not changed the command yet.