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[this question is solved, thanks!]

What's the best way to format the text file shown below the way in which


COlA ColB ColC ColD
---- ---- ---- ----
70 923 AAA 5864 ...

I learn using RS in awk to extract portion of file in this forum which is wonderful solution to the problem. However, I don't understand how exactly it operates.

I don't quite understand the...

I've read the man page of singal(3) but I still can't quite understand what is the difference between SIGINT, SIGALRM and SIGTERM.

Can someone tell me what is the behavioral difference among these...