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 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.