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Linux文件分割与合并:split&cat

热度 2已有 2226 次阅读2011-8-26 11:42 |系统分类:IT技术

  Linux下文件分割可以通过split命令来实现,可以指定按行数分割和安大小分割两种模式。Linux下文件合并可以通过cat命令来实现,非常简单。

  在Linux下用split进行文件分割:

  模式一:指定分割后文件行数

  对与txt文本文件,可以通过指定分割后文件的行数来进行文件分割。

  命令:split -l 300 large_file.txt new_file_prefix

  模式二:指定分割后文件大小

  对于可执行文件等二进制文件,则不能通过文件行数来进行文件分割,此时我们可以指定分割大小来分隔文件。

  命令:split -b 10m large_file.bin new_file_prefix

  对二进制文件我们同样也可以按文件大小来分隔。

  在Linux下用cat进行文件合并:

  命令:cat small_files* > large_file

  Linx文件分割命令split manpage:

  NAME
  split - split a file into pieces
  SYNOPSIS
  split [OPTION] [INPUT [PREFIX]]
  DESCRIPTION
  Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default size
  is 1000 lines, and default PREFIX is 'x'. With no INPUT, or when INPUT is
  -, read standard input.
  Mandatory arguments to long options are mandatory for short options too.
  -a, --suffix-length=N
  use suffixes of length N (default 2)
  -b, --bytes=SIZE
  put SIZE bytes per output file
  -C, --line-bytes=SIZE
  put at most SIZE bytes of lines per output file
  -d, --numeric-suffixes
  use numeric suffixes instead of alphabetic
  -l, --lines=NUMBER
  put NUMBER lines per output file
  --verbose
  print a diagnostic to standard error just before each output file
  is opened
  --help display this help and exit
  --version
  output version information and exit
  SIZE may have a multiplier suffix: b for 512, k for 1K, m for 1 Meg.
  AUTHOR
  Written by Torbjorn Granlund and Richard M. Stallman.
  REPORTING BUGS
  Report bugs to .
  COPYRIGHT
  Copyright (C) 2006 Free Software Foundation, Inc.
  This is free software. You may redistribute copies of it under the terms
  of the GNU General Public License .
  There is NO WARRANTY, to the extent permitted by law.
  SEE ALSO
  The full documentation for split is maintained as a Texinfo manual. If
  the info and split programs are properly installed at your site, the com-
  mand
  info split
  should give you access to the complete manual.

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