Linux 在bash中用另一个词替换一个词
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Replace a word with another in bash
提问by reza
I want to change all of the words in a text who matches a certain word with another one in bourne shell. For example:
我想更改文本中将某个单词与 bourne shell 中的另一个单词匹配的所有单词。例如：
hello sara, my name is sara too.
becomes:
变成：
hello mary, my name is mary too.
Can anybody help me?
I know that grep find similar words but I want to replace them with other word.
有谁能够帮助我？
我知道 grep 会找到相似的词，但我想用其他词替换它们。
采纳答案by anubhava
Pure bash way:
纯bash方式：
before='hello sara , my name is sara too .'
after="${before//sara/mary}"
echo "$after"
OR using sed:
或使用 sed：
after=$(sed 's/sara/mary/g' <<< "$before")
echo "$after"
OUTPUT:
输出：
hello mary , my name is mary too .
回答by Niklas B.
You can use sedfor that:
您可以使用sed：
$ sed s/sara/mary/g <<< 'hello sara , my name is sara too .'
hello mary , my name is mary too .
Or if you want to change a file in place:
或者，如果您想就地更改文件：
$ cat FILE
hello sara , my name is sara too .
$ sed -i s/sara/mary/g FILE
$ cat FILE
hello mary , my name is mary too .
回答by Wes Hardaker
You can use sed:
您可以使用 sed：
# sed 's/sara/mary/g' FILENAME
will output the results. The s/// construct means search and replace using regular expressions. The 'g' at the end means "every instance" (not just the first).
将输出结果。s/// 构造意味着使用正则表达式进行搜索和替换。最后的“g”表示“每个实例”（不仅仅是第一个）。
You can also use perl and edit the file in place:
您还可以使用 perl 并就地编辑文件：
# perl -p -i -e 's/sara/mary/g;' FILENAME
回答by jaypal singh
Or awk
或者 awk
awk '{gsub("sara","mary")}1' <<< "hello sara, my name is sara too."
