sed: how to change MAC address string with sed
 

Hello *,
please I need to know how can I change the MAX address string using sed. What I need is to add or subtract number from MAC address, e.g.

Input string:
ethaddr=00:21:04:4D:BB:00

Output string
ethaddr=00:21:04:4D:BB:05

Sorry for bugging but I don't have enough time to study the solution by myself and I'm not experienced with sed :-(.

Many thanks in advance.
jn.

....and, by implication, you also don't have time to learn SED?
This is not a good way to get help here....

First, you don't say what the criteria is for making a change. For example, is it always the last portion that needs to be changed? Do we need to test and sure the target number is part of a MAC? ....etc.

Second, why SED? If you set the the field separator to ":", then AWK is very handy for discriminating columns.

And I don't have enough time to help you either.

I have the time, and I know enough about awk (but not sed) to be able to accomplish the task, but I don't have enough time to post the solution

Guys,
I didn't have time to learn SED (no AWK on board) since I had some tight deadlines when this task had to be finished. Please if you don't want to help, don't start flames here.

Sorry, cold, but you started it.

If you read the thread, you'll see that I did want to help----I asked you a question which you apparently did not have time to answer. (My post was less than an hour after your started the thread.)

Why is this our problem?