ifconfig is a part of net-tools package, last release of which was in 2001 hence it's deprecated in any major distro since 2013. Unless you're running RHEL6 or

ifconfig is a part of net-tools package, last release of which was in 2001 hence it's deprecated in any major distro since 2013. Unless you're running RHEL6 or something that old, you shouldn't use it.