系统集成Linux

linux 将大文件分成小文件

最近lvm磁盘老报错，message文件大的惊人，想找个办法将这个文件分成若干的小文件来查看。无意中发现这个神器-----split

例如将一个message文件分成前缀为message_ 的100个小文件，后缀为系数形式，且后缀为4位数字形式

先利用

wc -l message 获得message 文件一共有多少行

然后将结果除以100记过大概是81114；

然后用 split 命令

1	split -l 81114 messages messages_

将文件message分成若干个小文件，每个文件81114 行(-l 81114 )，文件前缀为mesage_，系数不是字母而是数字（-d），后缀系数为四位数（-a 4）

SPLIT(1)                      User Commands                      SPLIT(1)
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 1000lines, 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 just before each output file is opened
   --help display this help and exit
   --version
            output version information and exit
   SIZE may be (or may be an integer optionally followed by) one of following: KB 1000, K1024,  MB
   1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.
AUTHOR
   Written by Torbjorn Granlund and Richard M. Stallman.
REPORTING BUGS
   Report split bugs to [email]bug-coreutils@gnu.org[/email]
   GNU coreutils home page:
   General help using GNU software:
   Report split translation bugs to
COPYRIGHT
   Copyright  ©  2010  Free  Software  Foundation, Inc.  License GPLv3+: GNU GPL version 3or later
   .
   This is free software: you are free to change and redistribute it.  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 pro-
   grams are properly installed at your site, the command
            info coreutils 'split invocation'
   should give you access to the complete manual.

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