Comments on: Split a text file in half (or any percentage) on Ubuntu Linux http://www.howtogeek.com/howto/ubuntu/split-a-text-file-in-half-or-any-percentage-on-ubuntu-linux/ Computer Help from your Friendly How-To Geek Sun, 08 Nov 2009 07:56:33 -0600 http://wordpress.org/?v=2.8.5 hourly 1 By: Simon C. Ion http://www.howtogeek.com/howto/ubuntu/split-a-text-file-in-half-or-any-percentage-on-ubuntu-linux/comment-page-1/#comment-69442 Simon C. Ion Sun, 29 Mar 2009 12:06:18 +0000 http://www.howtogeek.com/howto/ubuntu/split-a-text-file-in-half-or-any-percentage-on-ubuntu-linux/#comment-69442 If you have bc and sed installed, why not do this to calculate the halfway point of the file and perform the split? split -l $(echo $(cat tmp.txt | wc -l)/2 | bc -l | sed -e 's/\..*//') access.log NB: bc seems to default to a floating-point output. The sed invocation effectively act as a call to floor(3), stripping away the numbers after the decimal, and making my version of split happy. I guess that the sed expression would need to be changed to 's/,.*//' for locales that use ',' as their "numbers after the decimal" indicator. If you have bc and sed installed, why not do this to calculate the halfway point of the file and perform the split?

split -l $(echo $(cat tmp.txt | wc -l)/2 | bc -l | sed -e ’s/\..*//’) access.log

NB: bc seems to default to a floating-point output. The sed invocation effectively act as a call to floor(3), stripping away the numbers after the decimal, and making my version of split happy. I guess that the sed expression would need to be changed to ’s/,.*//’ for locales that use ‘,’ as their “numbers after the decimal” indicator.

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