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windowstextcmdsplitsize

How to split large text file in windows?

I have a log file with size of 2.5 GB. Is there any way to split this file into smaller files using windows command prompt?

Solution

  • If you have installed Git for Windows, you should have Git Bash installed, since that comes with Git.

    Use the split command in Git Bash to split a file:

    • into files of size 500MB each: split myLargeFile.txt -b 500m

    • into files with 10000 lines each: split myLargeFile.txt -l 10000

    Tips:

    • If you don't have Git/Git Bash, download at https://git-scm.com/download

    • If you lost the shortcut to Git Bash, you can run it using C:\Program Files\Git\git-bash.exe

    That's it!

    I always like examples though...

    Example:

    enter image description here

    You can see in this image that the files generated by split are named xaa, xab, xac, etc.

    These names are made up of a prefix and a suffix, which you can specify. Since I didn't specify what I want the prefix or suffix to look like, the prefix defaulted to x, and the suffix defaulted to a two-character alphabetical enumeration.

    Another Example:

    This example demonstrates

    • using a filename prefix of MySlice (instead of the default x),
    • the -d flag for using numerical suffixes (instead of aa, ab, ac, etc...),
    • and the option -a 5 to tell it I want the suffixes to be 5 digits long:

    enter image description here