The Full End Of Your Sanity

Content 2 Answers Active Oldest Votes Use shuf with the -n option as shown below, to get N random lines: 541 shuf -n N input output share improve this answer follow edited Jun 16 '16 at 20:48 DomainsFeatured 1,234 0 1 0 18 29 answered Feb 25 '13 at 11:03 dogbane 226k 69 351 388 35 This should be the accepted answer. Wow, shuf is sooo fast. - picking 10000 random lines from a textile with 40000 lines is instant. Trying to use 'sort -R' took so long I just CTRL-C it - carpii Jul 3 '15 at 20:10 2 If you just need a random set of lines, not in a random order, then shuf is very inefficient (for big file): better is to do reservoir sampling, as in this answer. - petrelharp Sep 6 '15 at 23:24 4 neither shuf nor sort -R are available for mac OSX. any suggestions? - Tom Smith Oct 6 '15 at 10:06 33 TomSmith On Mac OSX, if you are using Homebrew, you can get shuf or GNU sort by installing coreutils . More info here: apple.stackexchange.comquestions142860install-shuf-on-os-x - nofinator Oct 8 '15 at 13:11 7 shuf is fantastic. I tried in on a 78 Billion line text file and it did the job in less than 1 minute. - Ash Jan 19 '16 at 812 7 shuf is fantastic. I tried in on a 78 Billion line text file and it did the job in less than 1 minute. - Ash Jan 19 '16 at 8:13 78 Billion line text file The WHAT

The Project Manager is literally taking bullets for the team while developers peacefully sleep through the chaos. That brave PM is intercepting all those client complaints and feature requests with their own body, getting absolutely shredded in the process. Meanwhile, devs are in blissful REM sleep, completely unaware that their inbox would be a war zone without that human shield in green camo. The PM doesn't even get hazard pay for this level of client-facing carnage!

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Content Dev: This won't take long, I can just reuse code from another project. Result: