Question

我的档案：

"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"$t":"randomtext"}]}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"$t":"randomtext222"}]}
"title":{"type":"text"
"$t":"randomtext"}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"$t":"randomtext"}]}

我需要在postalAddress之后改变行上的$ t，而不是在带有标题的行之后改变$ t。

这将打印我想要更改的行。

sed -n '/postalAddress/ {n;p}' file.txt

这将打印我想要更改的行，其中包含更改：

sed -n '/postalAddress/ {n;p}' file.txt | sed 's/"$t":"/CHANGE/'

但是如何在我的文件中更改此内容？

以下是我的文件的样子：

"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext"}]}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext222"}]}
"title":{"type":"text"
"$t":"randomtext"}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext"}]}

Answer 1

使用sed

sed '/postalAddress/{n;s/\$t/CHANGE/;}' file
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext"}]}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext222"}]}
"title":{"type":"text"
"$t":"randomtext"}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext"}]}

使用awk即可：

awk '/postalAddress/ {print;getline;sub(/\$t/,"CHANGE")}1' file
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext"}]}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext222"}]}
"title":{"type":"text"
"$t":"randomtext"}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
"CHANGE":"randomtext"}]}

将标记与awk一起使用：

awk '/postalAddress/ {f=NR+1} f==NR {sub(/\$t/,"CHANGE");f=0}1 file

Answer 2

你真的应该使用一种理解你的数据的语言，这似乎是JSON，所以也许是Python。但我们可以使用sed来做到这一点：

sed '/}]}/ s/"$t":"/CHANGE/' file.txt

"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
CHANGErandomtext"}]}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
CHANGErandomtext222"}]}
"title":{"type":"text"
"$t":"randomtext"}
"gd$postalAddress":[{"rel":"http://schemas.google.com/g/2005#home"
CHANGErandomtext"}]}

这取决于标点符号是你所关注的行的结尾，而不是那些你不关注的行。

Sed打印nextline并更改它

2 个答案: