[RndTbl] Easy script question?

[Adam Thompson]

Like Tim said, you first have to know how many lines exist in the file before you can do anything other than stream processing.
On moderately-sized inputs, "wc -l" works reasonably well.  On large inputs, there's no way to do this efficiently unless you're willing to sacrifice accuracy.

F=filename
L=$(wc -l $F)
head -n $(( $L - num_of_ignored_lines ))

-Adam

On March 4, 2015 2:36:24 PM CST, Kevin McGregor <kevin.a.mcgregor at gmail.com> wrote:
>Can someone help me out? I'm too tired to think straight.
>
>Is there an easy/short way to get all BUT the last n lines of a text
>file/input? All I can think of is reversing the input line order and
>tail
>+n or something like that. FYI the input is not very big.
>
>Kevin
>
>
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