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Linux使用split和cat分卷与合并

Linux下分卷和合并文件方法有多种,split和cat就是其中的一个很方便方法,无需安装额外软件,系统默认支持。

分卷(分割)方法如下:

测试文件为:test.tar

使用split命令进行分割:

F:\>split -b 90m -a 2 test.tar test.tar.0

得到文件:test.tar.0aa,test.tar.0ab,....

合并方法:
F:\>cat test.tar.0* > test.tar

可得到test.tar文件,当然这里也可以使用copy命令完成,但需顺序列出子文件名,有点麻烦不推荐。

附split用法:

Usage: split [OPTION]... [INPUT [PREFIX]]
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   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 lines per output file
  -d, --numeric-suffixes[=FROM]  use numeric suffixes instead of alphabetic.
                                   FROM changes the start value (default 0).
  -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 per output file
  -n, --number=CHUNKS     generate CHUNKS output files.  See below
  -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

SIZE is an integer and optional unit (example: 10M is 10*1024*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
l/K/N   output Kth of N to stdout without splitting lines
r/N     like 'l' but use round robin distribution
r/K/N   likewise but only output Kth of N to stdout

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