Linux文件分割与合并:split & cat

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。

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 <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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