sed 学习笔记(与大家共勉)

smileinwind

太好了！
那个sed&awk.pdf的文档哪里能找到？

ohwww

[quote]原帖由 "admirer"]参考资料:<sed&awk.pdf>等[/quote 发表：
     老大,对你的参考资料比较感兴趣

twytigger

好文件已收藏！！

飞灰橙

俺顶

help z

支持

gunguymadman007

太牛乐
可惜看到4.3就看不动了  ：（

xinchill

我要加紧学习

lozity

sed -n -e '/test/{=;x;1!p;g;$!N;p;D;}' -e h  file

=lace the current line number on the standard output as a line.
x:Exchange the contents of the pattern and hold spaces.
print.  Copy the pattern space to the standard output.
g:Replace the contents of the pattern space by the contents of the hold space.
N:Append the next line of input to the pattern space with an embedded new-line.
  (The current line number changes.) If the end of input is reached, the N command verb shall branch to the end of the script
print.  Copy the pattern space to the standard output.
Delete the initial segment of the pattern space through the first new-line.Start the next cycle.  (See the N command below.)
h:Replace the contents of the hold space by the contents of the pattern space.
楼主能不能解释一下上面的命令，我就是没看出来sed是怎么存储匹配行的上面一行的？

梦蓝

echo "WeLoveChinaUnix"|sed -e 'H;s/\(..\).*/\1/;x;s/.*\(.\{9\}\)$/\1/;x;G;s/\n/ /'
-------------------------------------------------------------------------------
-e 可不用
H  建议为h
先取后9个，再取前2个可少一步最后的x

如果单纯为完成功能，可为：
echo "WeLoveChinaUnix"|sed  's/^\(..\).*\(.\{9\}\)$/\1 \2/'