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Linux文件分割与合并:split & cat 编辑词条 发表评论(0)

  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 ]

  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 <bug-coreutils@gnu.org>.

  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 <http://www.gnu.org/licenses/gpl.html>.

  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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