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 piecesSYNOPSIS       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 bug-coreutils@gnu.org       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.