split - split a file into pieces

Split  reads file (standard input by default) and writes it in pieces of 1000 lines per output file.  The
       names of the output files are xaa, xab, and so on to xzz.  The options are

       -nn   Split into n-line pieces.

       -ln   Synonym for -nn, a nod to Unix's syntax.

       -eexpression
              File divisions occur at each line that matches a regular expression; see regexp(7).   Multiple  -e
              options  may  appear.   If  a  subexpression  of expression is contained in parentheses (...), the
              output file name is the portion of the line which matches the subexpression.

       -fstem
              Use stem instead of x in output file names.

       -ssuffix
              Append suffix to names identified under -e.

       -x     Exclude the matched input line from the output file.

       -i     Ignore case in option -e; force output file names (excluding the suffix) to lower case.

       split - split a file into pieces

sed(1), awk(1), grep(1), regexp(7)

                                                                                                   SPLIT(1plan9)

/src/cmd/split.c

split [ option...  ] [ file ]