s e d例子中使用下述文本文件q u o t e . t x t

。

CODE:

[sam@Linux_chenwy sam]$ cat quote.txt
The honeysuckle band played all night long for only $90.
It was an evening of splendid music and company.
Too bad the disco floor fell through at 23:00.
The local nurse Miss P.Neave was in attendance.

1 使用p（rint）显示行
只打印第二行，用-n

CODE:

[sam@Linux_chenwy sam]$ sed -n '2p' quote.txt
It was an evening of splendid music and company.

2 打印范围
可以指定行的范围，现打印1到3行，用逗号分隔行号。

CODE:

[sam@Linux_chenwy sam]$ sed -n '1,3p' quote.txt
The honeysuckle band played all night long for only $90.
It was an evening of splendid music and company.
Too bad the disco floor fell through at 23:00.

3 打印模式
假定要匹配单词N e a v e，并打印此行，方法如下。使用模式/ p a t t e r n /格式，这里为/ N e a v e /。

CODE:

[sam@Linux_chenwy sam]$ sed -n '/The/p' quote.txt
The honeysuckle band played all night long for only $90.
The local nurse Miss P.Neave was in attendance.

4 使用模式和行号进行查询
可以将行号和模式结合使用。假定要改动文件q u o t e . t x t最后一行中的单词t h e，使用s e d查询t h e，返回两行：

CODE:

[sam@Linux_chenwy sam]$ sed -n '/The/p' quote.txt
The honeysuckle band played all night long for only $90.
The local nurse Miss P.Neave was in attendance.

使用模式与行号的混合方式可以剔除第一行，格式为l i n e _ n u m b e r, / p a t t e r n /。逗号用来分隔行号与模式开始部分。为达到预期结果，使用4 , / t h e /。意即只在第四行查询模式t h e，命令如下：

CODE:

[sam@Linux_chenwy sam]$ sed -n '4,/The/p' quote.txt
The local nurse Miss P.Neave was in attendance.

上面有错，其实是把第四行后的都打出来了
这个模式应该哪果指定行找不到符合条件的，就从下一行开始查找，直到找到为止，并把，找到行之前的全部打打印出来。
如果指定行本身就符合条伯，把本行及后面的行的全部打印出来


5 匹配元字符
匹配元字符$前，必须使用反斜线\屏蔽其特殊含义。模式为/\$/ p。

CODE:

[sam@Linux_chenwy sam]$ sed -n '/\$/p' quote.txt
The honeysuckle band played all night long for only $90.

6 显示整个文件
要打印整个文件，只需将行范围设为第一行到最后一行1 , $。$意为最后一行。

CODE:

[sam@Linux_chenwy sam]$ sed -n '1,$p' quote.txt
The honeysuckle band played all night long for only $90.
It was an evening of splendid music and company.
Too bad the disco floor fell through at 23:00.
The local nurse Miss P.Neave was in attendance.

7 任意字符
匹配任意字母，后跟任意字母的0次或多次重复，并以i n g结尾，模式为/ . * i n g /。可以使用这个模式查询以i n g结尾的任意单词。

CODE:

[sam@Linux_chenwy sam]$ sed -n '/.*ing/p' quote.txt
It was an evening of splendid music and company.

8 首行
要打印文件第一行，使用行号：

CODE:

[sam@Linux_chenwy sam]$ sed -n '1p' quote.txt
The honeysuckle band played all night long for only $90.

9 最后一行
要打印最后一行，使用$。$是代表最后一行的元字符。

CODE:

[sam@Linux_chenwy sam]$ sed -n '$p' quote.txt
The local nurse Miss P.Neave was in attendance.

10 打印行号
要打印行号，使用等号=。打印模式匹配的行号，使用格式/ p a t t e r n / =。

CODE:

[sam@Linux_chenwy sam]$ sed -e '/music/=' quote.txt
The honeysuckle band played all night long for only $90.
2
It was an evening of splendid music and company.
Too bad the disco floor fell through at 23:00.
The local nurse Miss P.Neave was in attendance.

整个文件都打印出来，并且匹配行打印了行号。如果只关心实际行号，使用- e选项。

CODE:

[sam@Linux_chenwy sam]$ sed -n '/music/=' quote.txt
2

如果只打印行号及匹配行，必须使用两个s e d命令，并使用e选项。第一个命令打印模式匹配行，第二个使用=选项打印行号，格式为sed -n -e /pattern/p -e /pattern/=

CODE:

[sam@Linux_chenwy sam]$ sed -n -e '/music/p' -e '/music/='  quote.txt
It was an evening of splendid music and company.
2