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

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 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 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, K 1024,  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 protected]
       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 3 or 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.