sed之n、h、x、N、G使用

$ cat file
Packages: Hello-1
Owner: me me me me
Other: who care?
Description:
Hello world!
Other2: don't care
[要求]
1、如果Description：之后为空，将其后一行内容并入此行。
2、如果Packages中包含‘Hello'，将 Owner那一行copy到Description行的下一行并改为Origial-Owner

[cpp] view plain copy print?
sed '/Packages.*Hello/{n;h;s/^/Origial-/;x};/Description:$/{N;s/\n/ /;G}' file

[注释]
/Packages.*Hello/匹配,确定包含Packages的是否包含Hello;
n,读入下一行资料至pattern space;
h,将暂存pattern space的资料至hold space;
s/^/Origial-/开头替换,也就是开头加上;
x,将hold space与pattern space内的数据交换;
/Description:$/匹配只包含Description的行;
N,添加下一笔资料至pattern space内;
G,添加在pattern space原来数据后。