将包含多个单词的单行拆分为多行,每行包含x个单词

Question

我有一个大文本文件,只包含1行.它看起来像这样:

blaalibababla.ru text text text text what's the weather like tooday? blaazzabla.zu some_text blabewdwefla.au it is important not to be afraid of sed blabkrlqbla.ru wjenfkn lkwnef lkwnefl blarthrthbla.net 1234 e12edq 42wsdfg blablabla.com this should finally end

我需要一种方法使它看起来像这样:

blaalibababla.ru text text text text what's the weather like tooday?
blaazzabla.zu some_text
blabewdwefla.au it is important not to be afraid of sed
blabkrlqbla.ru wjenfkn lkwnef lkwnefl
blarthrthbla.net 1234 e12edq 42wsdfg 
blablabla.com this should finally end

我知道如何使用单个域名来做到这一点sed:

sed -i 's/blablabla.ru/\n&/g' file.txt

"但事后没有补充文字." - 这不是我的意思.

如果sed不是最好的方式,请告诉我.

UPD:这是我的文本文件:

wsd.qwd.qwd.kjqnwk.ru PUPPETD CRITICAL 2017-01-13 00:09:52   lor notify-by-sms FILE_AGE CRITICAL:   /var/lib/puppet/state/state.yaml is 2438046 seconds old and 19459 bytes   zm-goas-04.asdg.net LOAD CRITICAL 2017-01-13 00:10:32   tech-lor notify-by-telegram CRITICAL - load average: 42.91,   49.91, 53.88   glas07.kvm.ext.asdg.ru PUPPETD CRITICAL 2017-01-13 00:28:02   lor notify-by-sms FILE_AGE CRITICAL:   /var/lib/puppet/state/state.yaml is 19821 seconds old and 26337 bytes    

我需要它看起来像:

wsd.qwd.qwd.kjqnwk.ru PUPPETD CRITICAL 2017-01-13 00:09:52   lor notify-by-sms FILE_AGE CRITICAL:   /var/lib/puppet/state/state.yaml is 2438046 seconds old and 19459 bytes   
zm-goas-04.asdg.net LOAD CRITICAL 2017-01-13 00:10:32   tech-lor notify-by-telegram CRITICAL - load average: 42.91,   49.91, 53.88   
glas07.kvm.ext.asdg.ru PUPPETD CRITICAL 2017-01-13 00:28:02   lor notify-by-sms FILE_AGE CRITICAL:   /var/lib/puppet/state/state.yaml is 19821 seconds old and 26337 bytes    

Answer 1

用于一次xargs处理n记录的一种更简单的方法,在您的情况下就是这样2

xargs -n2 <file
blablabla.ru some_text
blablabla.zu some_text
blablabla.au some_text
blablabla.ru some_text
blablabla.net some_text
blablabla.com some_text

-n根据man xargs页面的标志是,

-n max-args, --max-args=max-args
      Use at most max-args arguments per command line.  Fewer than max-args arguments 
      will be used if the size (see the -s option) is exceeded, unless the
      -x option is given, in which case xargs will exit.

要替换回原始文件,请执行

xargs -n2 <file >tmpfile; mv tmpfile file