sed学习整理(二)

内容：

    1、选项与形式

    2、举例   

二、举例

       2.1.1、建立test.txt文件

[admin@localhost sed]$ cat -n test.txt

1 ---------------------------------

2 abcc

3 [e-mail]

4 Test u:mondey

5 OctoberD

6 [e-mail]

7 October

8 r-truth

9 5456fdsgdfg889g

10 bigshow

11 [e-mail]

12 magic per

13 [e-mail]

14 perhaps

15 [e-mail]

16 [e-mail]

17 AAAbbbCCC

18 END

19 ---------------------------------

20 Others

[admin@localhost sed]$

          2.1.2、格式二查找，且存在模式（1.1.3\1.1.4）：

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '2,/sohu.com/p' test.txt

abcc

[e-mail]

[admin@localhost sed]$ sed -n '3,/sohu.com/p' test.txt

[e-mail]

Test u:mondey

OctoberD

[e-mail]

October

r-truth

5456fdsgdfg889g

bigshow

[e-mail]

[admin@localhost sed]$ sed -n '4,/sohu.com/p' test.txt

Test u:mondey

OctoberD

[e-mail]

October

r-truth

5456fdsgdfg889g

bigshow

[e-mail]

[admin@localhost sed]$ sed -n '16,/sohu.com/p' test.txt

[e-mail]

AAAbbbCCC

END

---------------------------------

Others

[admin@localhost sed]$

            2.1.3、格式二查找，且不存在模式（1.1.3\1.1.4）：

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '2,/UUUUUU/p' test.txt

abcc

[e-mail]

Test u:mondey

OctoberD

[e-mail]

October

r-truth

5456fdsgdfg889g

bigshow

[e-mail]

magic per

[e-mail]

perhaps

[e-mail]

[e-mail]

AAAbbbCCC

END

---------------------------------

Others

[admin@localhost sed]$ sed -n '5,/UUUUUU/p' test.txt

OctoberD

[e-mail]

October

r-truth

5456fdsgdfg889g

bigshow

[e-mail]

magic per

[e-mail]

perhaps

[e-mail]

[e-mail]

AAAbbbCCC

END

---------------------------------

Others

[admin@localhost sed]$ sed -n '16,/UUUUUU/p' test.txt

[e-mail]

AAAbbbCCC

END

---------------------------------

Others

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '30,/UUUUUU/p' test.txt

[admin@localhost sed]$

            2.1.4、格式一查找，且存在模式（1.1.1\1.1.2）：

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '/sohu.com/,2p' test.txt

[e-mail]

[e-mail]

[e-mail]

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '/sohu.com/,3p' test.txt

[e-mail]

[e-mail]

[e-mail]

[admin@localhost sed]$ sed -n '/sohu.com/,4p' test.txt

[e-mail]

Test u:mondey

[e-mail]

[e-mail]

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '/sohu.com/,16p' test.txt

[e-mail]

Test u:mondey

OctoberD

[e-mail]

October

r-truth

5456fdsgdfg889g

bigshow

[e-mail]

magic per

[e-mail]

perhaps

[e-mail]

[e-mail]

[admin@localhost sed]$

         2.1.5、格式一查找，不存在模式（1.1.1\1.1.2）：：

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '/UUUUUU/,2p' test.txt

[admin@localhost sed]$ sed -n '/UUUUUU/,3p' test.txt

[admin@localhost sed]$ sed -n '/UUUUUU/,4p' test.txt

[admin@localhost sed]$ sed -n '/UUUUUU/,16p' test.txt

[admin@localhost sed]$

          2.1.6、将sed处理结果写入文件：

[admin@localhost sed]$

[admin@localhost sed]$ sed -n '1,6 w 1_6_test' test.txt

[admin@localhost sed]$ cat 1_6_test

---------------------------------

abcc

[e-mail]

Test u:mondey

OctoberD

[e-mail]

[admin@localhost sed]$

       2.1.7、显示行号以及匹配项：

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$ sed -n -e '/sohu/p' -e '/sohu/=' test.txt

[e-mail]

3

[e-mail]

11

[e-mail]

15

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$ sed -n -e '/sohu/p' test.txt

[e-mail]

[e-mail]

[e-mail]

[admin@localhost sed]$

        2.1.8、在指定文本行进行字符串替换：

[admin@localhost sed]$

[admin@localhost sed]$ cat test.txt

---------------------------------

abcc

[e-mail]

Test u:mondey

OctoberD

[e-mail]

October

r-truth

5456fdsgdfg889g

bigshow

[e-mail]

magic per

[e-mail]

perhaps

[e-mail]

[e-mail]

AAAbbbCCC

END

---------------------------------

Others

[admin@localhost sed]$ sed -n -e '1,7s/sohu/yahoo/gp' test.txt

[e-mail]

[admin@localhost sed]$

-------------这里指明了在1--8行之间进行文本替换，将sohu替换为yahoo

           2.1.9、通过指定模式间接在匹配的文本行间进行字符串替换：

[admin@localhost sed]$ cat -n test.txt

1 ---------------------------------

2 abcc

3 [e-mail]

4 Test u:mondey

5 OctoberD

6 [e-mail]

7 October

8 r-truth

9 5456fdsgdfg889g

10 bigshow

11 [e-mail]

12 magic per

13 [e-mail]

14 perhaps

15 [e-mail]

16 [e-mail]

17 AAAbbbCCC

18 END

19 ---------------------------------

20 Others

[admin@localhost sed]$

[admin@localhost sed]$ sed -n -e '/^O/,/^END/s/\.com/\DOTCOM/p' test.txt

TTTT@gmailDOTCOM

EEEEE@sohuDOTCOM

DDDDD@gmailDOTCOM

AAAAAA@sohuDOTCOM

AABBAA@gmailDOTCOM

[admin@localhost sed]$

------------------如果指定的模式存在多处的话，情况就比较复杂，这个需要进一步测试验证……

           2.1.10、可以通过其他间隔符执行s///

如果模式中存在'/',一方面可以通过转移字符'\'进行处理，另外i可以通过"："进行代替:

[admin@localhost sed]$ sed -e 's:/usr/local:/usr:g' test.txt

           2.1.11、去除贪婪

[admin@localhost sed]$ cat perhaps.txt

This  is what I want!

[admin@localhost sed]$

[admin@localhost sed]$ sed -n 's/^<.*>//gp' perhaps.txt

want!

[admin@localhost sed]$

[admin@localhost sed]$ sed -n 's/<[^>]*>//gp' perhaps.txt

This is what I want!

[admin@localhost sed]$

            2.1.12、运用转义字符+（）

[admin@localhost sed]$ cat just.txt

aa;bb;cc;dd

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$ sed -n -e 's/\(.*\);\(.*\);\(.*\);\(.*\)/AA\1,\2,CC\3,\4/gp' just.txt

AAaa,bb,CCcc,dd

[admin@localhost sed]$

          2.1.13、应用大括号{}

 

[admin@localhost sed]$

[admin@localhost sed]$ cat -n test.txt

1 ---------------------------------

2 abcc

3 [e-mail]

4 Test u:mondey

5 OctoberD

6 [e-mail]

7 October

8 r-truth

9 5456fdsgdfg889g

10 bigshow

11 [e-mail]

12 magic per

13 [e-mail]

14 perhaps

15 [e-mail]

16 [e-mail]

17 AAAbbbCCC

18 END

19 ---------------------------------

20 Others

[admin@localhost sed]$

[admin@localhost sed]$

[admin@localhost sed]$ sed -n -e '1,12{s/sohu/yahoo/g p;s/gmail/hotmail/g p}' test.txt

[e-mail]

[e-mail]

[e-mail]

[admin@localhost sed]$