roswtf : ERROR Local network configuration is invalid
Straight copy of the terminal:
zaki@hp-pc:/opt/ros/melodic/share/rosmaster$ roswtf
Loaded plugin tf.tfwtf
Package: rosmaster
================================================================================
Static checks summary:
Found 1 error(s).
ERROR Local network configuration is invalid: Local hostname [hp-pc] resolves to [fe80::8264:cbfe:70a0:3963], which does not appear to be a local IP address ['127.0.0.1', '192.168.1.41'].
================================================================================
ROS Master does not appear to be running.
Online graph checks will not be run.
ROS_MASTER_URI is [http://localhost:11311]
This looks like a duplicate of #q334530. If it is, please don't post duplicates, but post a comment on the old question.