Last login: Wed Apr 29 21:22:21 on ttys000 gim-yeongdeog-ui-MacBook-Air:~ KimYoungDirk$ ifconfig lo0: flags=8049 Not able to see wlan0 on executing the command ifconfig: The output on executing the command ifconfig is eth0: flags=4163 Last login: Wed Apr 29 21:22:21 on ttys000 gim-yeongdeog-ui-MacBook-Air:~ KimYoungDirk$ ifconfig lo0: flags=8049 The venerable ifconfig is available on almost every unix I have encountered. In addition to reporting the IP addressing and usage statistics of an optionally specified interface, ifconfig can modify an interface's MTU and other flags and interface characteristics, bring up an interface and bring down an interface. Last login: Wed Apr 29 21:22:21 on ttys000 gim-yeongdeog-ui-MacBook-Air:~ KimYoungDirk$ ifconfig lo0: flags=8049ifconfig [interface-name] For example: Q4. How to disable or enable a network interface using ifconfig? To do this, just specify the 'down' or 'up' flags. For example, to disable an interface dubbed eth0, use the ifconfig command in the following way: ifconfig eth0 down. Similarly, to enable, use the following command: ifconfig eth0 up Q5.
Feb 28, 2016 · One of many useful commands to master as an administrator of Linux systems is the ifconfig command. flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0