Question

我需要用sed命令替换这行：

;[homes]
;   browseable = no

在这一行：

[homes]
browseable = yes

Answer 1

sed -e 's/^; *//'，除非您的示例不涵盖所有情况。

Answer 2

有很多方法可以修复显示的两条线。如果您认为这是ini文件格式并且可能有其他部分包含browseable以及除[homes]之外的其他部分（不应编辑），则会变得有点棘手。

sed -e '/^;\[homes]/,/^;*\[/{
        s/;\[homes]/[homes]/
        s/^; *browseable.*/browseable = yes/
        }'

给定输入文件：

;[alerts]
;  browseable = no
;[homes]
;  browseable = no
;  alternatives = no
;[houses]
;  browseable = no
[mezzanine]
;  browseable = no
   alternatives = yes

上述脚本的输出是：

;[alerts]
;  browseable = no
[homes]
browseable = yes
;  alternatives = no
;[houses]
;  browseable = no
[mezzanine]
;  browseable = no
   alternatives = yes

Answer 3

您可以使用awk进行更改。

awk '{sub(/^;[ ]*/,"")} /browseable/ {$3="yes"}1'
[homes]
browseable = yes

鉴于Jonthan的数据

awk '/homes/ {sub(/^;[ ]*/,"");f=1} f && /browseable/ {sub(/^;[ ]*/,"");$3="yes";f=0}1' file
;[alerts]
;  browseable = no
[homes]
browseable = yes
;  alternatives = no
;[houses]
;  browseable = no
[mezzanine]
;  browseable = no
   alternatives = yes

或者像这样：

awk '/homes/ {$0="[homes]";f=1} f && /browseable/ {$0="browseable = yes";f=0}1' file

Answer 4

这也可以，

sed 's/^;//g;s/^ *\(.*\)/\1/g;s/no/yes/g' file

用sed代替;和空白

4 个答案: