sudo: ifconfig: command not found code example

Example 1: ifconfig command not found

sudo apt-get install net-tools or sudo ifconfig

Example 2: ifconfig not found ubuntu

#installation
$ sudo apt install net-tools

#Then use it
$ ifconfig

Example 3: sudo: apt: command not found

If apt is not found so Linux is CentOS which is RedHat-based
RedHat installs use yum not apt-get