Counting Down on Intrepid Ibex

I just can't wait :-D

Extracting Similarity Between Two (Text) Files

When you need to compare difference between two files, you have diff.
When you need to find similarity between such files, as far as I know, you need to devise your own script.
This is my oneliner script for such need (assuming files to be compared named file-01 & file-02):

for ((i=1;i<=$(wc -l file-01|awk '{print $1}');i+=1)); do grep $(awk -v a=$i 'NR==a' file-01) file-02 ; done

Ugly, but working...

The Reason

If I know the answer of "Why",
I believe I'll better understand the question of "How"

I need to know why I want to be rich, before seeking the way to be richer
I need to know why I want to be free, before breaking anything that hold me back
I need to know why I want to be happy, before pursuing the happiness itself

But, is it wise to seek the reason of being right, while I am still pursuing the very question of what is truth?