UNIX for Beginners Questions & Answers

In addition to post 6, I've always noticed this and have to add an extra grep to the end of lines pipe connected sequences (probably badly written ) to get the output I want highlighted. I usually use use an expression that matches every line too, so in your case I would append the following:-

Code:

........ | egrep --color -Ei "|abcd"

... so I'm matching your string abcd or a null (every line, but no character) to get all the output and colour the important characters.

You might be able to remove your existing grep -Ei 'abcd' and just use the above at the end, but it depends if that might leave too many records to be processed by your tr. By 'too many', I'm thinking of over 100,000 unneeded records, such a volume that might slow your overall pipeline.


I hope that this helps,
Robin