[clug] Two (perhaps simple) shell questions.

Robert Thorsby robert at thorsby.com.au
Mon Aug 17 19:50:36 MDT 2009

On 18/08/09 11:33:01, Andrew Janke wrote:
> 1) I had a need (really) to remove every second newline from a file
> the other day and all I could think of was this:

If you are trying to convert two intervening blank lines into one blank 
line, try:
awk 'BEGIN{RS="\n\n"}{print($0)}' input.file > output.file

However, if you wish to halve the number of lines (regardless of their 
content) just print odd (or even) lines.

Robert Thorsby
Know your enemies well because that's the only way you are going to 
defeat them. And know your friends even better just in case they become 
your enemies.

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