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。
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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