Linux大文件分割splite

/**********************************************************************
 *                  Linux大文件分割splite
 * 说明：
 *     编译RK3288 Android源代码的时候发现，Android源代码是tar包被分割成四份，
 * 查了一下资料才知道用了splite进行分割；
 *
 *                                2018-5-7 深圳 宝安西乡 曾剑锋
 *********************************************************************/

一、参考文档：
    1. Linux split命令
        http://www.runoob.com/linux/linux-comm-split.html

二、split help：
    Usage: split [OPTION]... [FILE [PREFIX]]
    Output pieces of FILE to PREFIXaa, PREFIXab, ...;
    default size is 1000 lines, and default PREFIX is 'x'.
    
    With no FILE, or when FILE is -, read standard input.
    
    Mandatory arguments to long options are mandatory for short options too.
      -a, --suffix-length=N   generate suffixes of length N (default 2)
          --additional-suffix=SUFFIX  append an additional SUFFIX to file names
      -b, --bytes=SIZE        put SIZE bytes per output file
      -C, --line-bytes=SIZE   put at most SIZE bytes of records per output file
      -d                      use numeric suffixes starting at 0, not alphabetic
          --numeric-suffixes[=FROM]  same as -d, but allow setting the start value
      -e, --elide-empty-files  do not generate empty output files with '-n'
          --filter=COMMAND    write to shell COMMAND; file name is $FILE
      -l, --lines=NUMBER      put NUMBER lines/records per output file
      -n, --number=CHUNKS     generate CHUNKS output files; see explanation below
      -t, --separator=SEP     use SEP instead of newline as the record separator;
                                '' (zero) specifies the NUL character
      -u, --unbuffered        immediately copy input to output with '-n r/...'
          --verbose           print a diagnostic just before each
                                output file is opened
          --help     display this help and exit
          --version  output version information and exit
    
    The SIZE argument is an integer and optional unit (example: 10K is 10*1024).
    Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).
    
    CHUNKS may be:
      N       split into N files based on size of input
      K/N     output Kth of N to stdout
      l/N     split into N files without splitting lines/records
      l/K/N   output Kth of N to stdout without splitting lines/records
      r/N     like 'l' but use round robin distribution
      r/K/N   likewise but only output Kth of N to stdout
    
    GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
    Full documentation at: <http://www.gnu.org/software/coreutils/split>
    or available locally via: info '(coreutils) split invocation'