32v 1m split
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SPLIT(1) UNIX Programmer's Manual SPLIT(1)
NAME
split - split a file into pieces
SYNOPSIS
split [ -_n ] [ file [ name ] ]
DESCRIPTION
_S_p_l_i_t reads _f_i_l_e and writes it in _n-line pieces (default 1000), as many as necessary, onto a set of output files. The name of the first output file is _n_a_m_e with aa appended, and so on lexicographically. If no output name is given, x is default.
If no input file is given, or if - is given in its stead, then the standard input file is used.