my log.txt file includes ...mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128...how can I replace mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128withmynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 0.0.0.0/0  from the command Line? In other words, I want to add 0.0.0.0/0 to the end of that line.
Find and Replace with command line
text processing;awk;sed;grep
To add the specified text to a line in the file - if that line is the only one that starts with mynetworks, you can do this:sed --in-place '/^mynetworks/s_.*_& 0.0.0.0/0_' /path/to/file