sed：在匹配模式的行首或者行尾插入字符.pdfVIP

sed：在匹配模式的⾏⾸或者⾏尾插⼊字符

infosed，可以看到更多

/jc/misc/insert-character-in-the-beginning-or-end-of-line-with-matched-pattern-in-sed.html

shannon：这个⽹站好像错

sed：在匹配模式的⾏⾸或者⾏尾插⼊字符

⽰例⽂件“/tmp/file”

1

Portrpc.statdshouldlistenon.

2

STATD_PORT=662

3Outgoingportstatdshouldused.Thedefaultisport

4israndom

5STATD_OUTGOING_PORT=2016

Specifycalloutprogram

6

STATD_HA_CALLOUT=/usr/local/bin/foo

7

在⾏⾸添加内容

⽰例1

在包含的⾏开头添加注释符号

“STATDuPORT”“”

解决⽅案

1

2sed/STATD_PORT/s/^///tmp/file

Portrpc.statdshouldlistenon.

3

STATD_PORT=662

4Outgoingportstatdshouldused.Thedefaultisport

5israndom

6STATD_OUTGOING_PORT=2016

Specifycalloutprogram

7

STATD_HA_CALLOUT=/usr/local/bin/foo

8

将更改结果保存到⽂件：

1sed-i/STATD_PORT/s/^///tmp/file

⽰例2

要匹配的内容在⾏的中间

匹配并在⾏⾸添加注释字符

“callout”“”

解决⽅案

1

2sed/callout/s/^///tmp/file

Portrpc.statdshouldlistenon.

3

STATD_PORT=662

4Outgoingportstatdshouldused.Thedefaultisport

5israndom

6STATD_OUTGOING_PORT=2016

Specifycalloutprogram

7

STATD_HA_CALLOUT=/usr/local/bin/foo

8

在⾏尾添加内容

⽰例1

在与“callout”匹配的⾏的末尾添加“yourtext”

1

2sed/callout/s/$/yourtext//tmp/file

Portrpc.statdshouldlistenon.

3

STATD_PORT=662

4Outgoingportstatdshouldused.Thedefaultisport

5israndom

6STATD_OUTGOING_PORT=2016

Specifycalloutprogramyourtext

7

STATD_HA_CALLOUT=/usr/local/bin/foo

8

⽰例2

在以“STATD”开头的⾏的末尾添加“yourtext”

1

sed/^STATD/s/$/yourtext//tmp/file

2

Portrpc.statdshouldlistenon.

3STATD_PORT=662yourtext

4Outgoingportstatdshouldused.Thedefaultisport

5israndom

STATD_OUTGOING_PORT=2016yourtext

6

Specifycalloutprogram

7

STATD_HA_CALLOUT=/usr/local/bin/fooyourtext

8