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UGU: Unix Guru Universe - Unix Tip #4167- July 9, 2012
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Unix Tip #4167- July 9, 2012
RANDOM LINES FROM A FILE
A easy way to retrieve random lines from a text file:
perl -e '$count = 10; @line = <>; for (1..$count) { print $line[int rand @line] }'
example:
% cat /etc/passwd | perl -e '$count = 10; @line = <>; for (1..$count) { print $line[int rand @line] }'
This tip generously supported by: abend@110.net
NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted
by various unix admins around the globe. UGU suggest you read and
test each tip in a non-volitile environment before placing into
production.
LAST 5 TIPS
4166
- EXTRACT THAT LAST FIELD
4165
- FULL OF FILESYSTEM INODES
4164
- FORGET THE CRONTAB MAN
4163
- POWER OF BACKQUOTES
4162
- PING THE HOST TABLE
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