Linux 替换文件 Unix 中的字符串
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Replacing string in file Unix
提问by Mika H.
I have a text file file1.txton Unix. I'd like to produce another file file2.txt, in which I replace all occurrences of apple-piewith apple_pie. What command can I use?
我file1.txt在 Unix 上有一个文本文件。我想产生另一个文件file2.txt，在其中我代替所有出现的apple-pie用apple_pie。我可以使用什么命令？
采纳答案by Chris Seymour
Use sedto do a global substitution on file1.txtand redirect the output to file2.txt:
用sed做全局替换上file1.txt和输出重定向到file2.txt：
sed 's/apple-pie/apple_pie/g' file1.txt > file2.txt
回答by javaPlease42
sedhas better performance than awkbut both will work for this search and replace. Reference
sed性能比awk但两者都适用于此搜索和替换。参考
If you put the commands in a script (e.g., ksh, sh) then here is the syntax:
如果将命令放在脚本中（例如 ksh、sh），则语法如下：
awk '{gsub(/apple-pie/,"apple_pie");print}' "file1.txt" > "file2.txt"
sed -e 's/apple-pie/apple_pie/g' "file1.txt" > "file2.txt"
