csplit
Split a file into pieces. This generates files named "xx00", "xx01", and so on. More information: https://www.gnu.org/software/coreutils/csplit.
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Split a file at lines 5 and 23:
csplit {{path/to/file}} {{5}} {{23}}
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Split a file every 5 lines (this will fail if the total number of lines is not divisible by 5):
csplit {{path/to/file}} {{5}} {*}
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Split a file every 5 lines, ignoring exact-division error:
csplit -k {{path/to/file}} {{5}} {*}
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Split a file at line 5 and use a custom prefix for the output files:
csplit {{path/to/file}} {{5}} -f {{prefix}}
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Split a file at a line matching a regular expression:
csplit {{path/to/file}} /{{regular_expression}}/
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