1. ctrl-o to open the text file
2. open "File->Save As->Split by lines/chars/bytes" menu
3. change "split file by" to 20 and select "files" option
4. click "Next" and give an output file name, such as output.txt
5. click "Save", and the file will be splitted to 20 files with same size:
output.001.txt
output.002.txt
...
output.020.txt
Note 1: if you don't like the naming rule, you can change "split naming" rule in step 3.
Note 2: for large files, split by "Lines" or "Chars" is much faster. |