查找并替换文件中的字符串 [英] find and replace string in a file

问题描述

我正在尝试查找并替换文件文件夹中的字符串.

I'm trying to find and replace a string in a folder of files.

有人可以帮我吗?

我的脚本如下:

#!/bin/bash
OLD="This is a"
NEW="I am a"
DPATH="/home/user/test/*.txt"
BPATH="/home/user/test/backup/foo"
[ ! -d $BPATH ] && mkdir -p $BPATH || :
for f in $DPATH
do
  if [ -f $f -a -r $f ]; then
    /bin/cp -f $f $BPATH
    sed "s/$OLD/$NEW/g" "$f"
   else
    echo "Error: Cannot read $f"
  fi
done

现在，这似乎找到了字符串"This is a"，并替换为"I am a"，但这仅显示在屏幕上.

Now this seems to find the string 'This is a' and replaces with 'I am a', but this only prints to screen.

我需要它来替换文件本身.

I need it to replace in the files themselves.

谢谢

推荐答案

使用sed的-i选项进行适当的更改:

Use the -i option of sed to make the changes in place:

sed -i "s/$OLD/$NEW/g" "$f"
    ^^

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