Linux命令(117)之split

linux命令之split

1.split介绍

linux命令split是按照指定的大小或行数分割文件。输出文件名为“前缀aa”、“前缀ab”。默认前缀以“x”开头，默认文件大小为1000行

2.split用法

split [参数] filename [前缀]

split参数

3.实例

3.1.默认分割文件

命令：

split ztj.log

[root@rhel77 ztj.bak]# ls -l ztj.log 
-rw-r--r-- 1 root root 81141 Nov  8 08:55 ztj.log
[root@rhel77 ztj.bak]# split ztj.log
[root@rhel77 ztj.bak]# ls
xaa  xab(输出文件名为"前缀aa"、"前缀ab"且默认前缀为"x")  ztj.log
[root@rhel77 ztj.bak]# 
[root@rhel77 ztj.bak]# wc -l xaa
1000 xaa(默认大小为1000行)
[root@rhel77 ztj.bak]# wc -l xab
682 xab(最后文件小于1000行，就全部显示)
[root@rhel77 ztj.bak]#

3.2.分割文件，设置行数为500行

 命令：

split -l 500 ztj.log

[root@rhel77 ztj.bak]# split -l 500 ztj.log
[root@rhel77 ztj.bak]# ls
xaa  xab  xac  xad  ztj.log
[root@rhel77 ztj.bak]# wc -l xaa
500 xaa
[root@rhel77 ztj.bak]# wc -l xab
500 xab
[root@rhel77 ztj.bak]# wc -l xac
500 xac
[root@rhel77 ztj.bak]# wc -l xad
182 xad
[root@rhel77 ztj.bak]#

3.3.分割文件，设置后缀长度为5

命令：

split -a 5 ztj.log

[root@rhel77 ztj.bak]# split -a 5 ztj.log
[root@rhel77 ztj.bak]# ls
xaaaaa  xaaaab  ztj.log
[root@rhel77 ztj.bak]# wc -l xaaaaa
1000 xaaaaa
[root@rhel77 ztj.bak]# wc -l xaaaab
682 xaaaab
[root@rhel77 ztj.bak]#

3.4.分割文件，设置文件大小为2000字节，并显示详细输出

命令：

split --verbose -b 2000 ztj.log

[root@rhel77 ztj.bak]# split --verbose -b 2000 ztj.log
creating file ‘xaa’
creating file ‘xab’
creating file ‘xac’
creating file ‘xad’
creating file ‘xae’
creating file ‘xaf’
creating file ‘xag’
creating file ‘xah’
creating file ‘xai’
creating file ‘xaj’
creating file ‘xak’
creating file ‘xal’
creating file ‘xam’
creating file ‘xan’
creating file ‘xao’
creating file ‘xap’
creating file ‘xaq’
creating file ‘xar’
creating file ‘xas’
creating file ‘xat’
creating file ‘xau’
creating file ‘xav’
creating file ‘xaw’
creating file ‘xax’
creating file ‘xay’
creating file ‘xaz’
creating file ‘xba’
creating file ‘xbb’
creating file ‘xbc’
creating file ‘xbd’
creating file ‘xbe’
creating file ‘xbf’
creating file ‘xbg’
creating file ‘xbh’
creating file ‘xbi’
creating file ‘xbj’
creating file ‘xbk’
creating file ‘xbl’
creating file ‘xbm’
creating file ‘xbn’
creating file ‘xbo’
[root@rhel77 ztj.bak]# 
[root@rhel77 ztj.bak]# ls
xac  xaf  xai  xal  xao  xar  xau  xax  xba  xbd  xbg  xbj  xbm  ztj.log
xaa   xad  xag  xaj  xam  xap  xas  xav  xay  xbb  xbe  xbh  xbk  xbn
xab   xae  xah  xak  xan  xaq  xat  xaw  xaz  xbc  xbf  xbi  xbl  xbo

3.5.分割文件，设置文件前缀为test

命令：

split -l 1000 ztj.log test

[root@rhel77 ztj.bak]# split -l 1000 ztj.log test
[root@rhel77 ztj.bak]# ls
testaa  testab  ztj.log
[root@rhel77 ztj.bak]# wc -l testaa 
1000 testaa
[root@rhel77 ztj.bak]# wc -l testab
682 testab
[root@rhel77 ztj.bak]#