问题:

This question already has an answer here:

Recursive search and replace in text files on Mac and Linux 14 answers

I have about 100 .txt files that contain plain text. Somehow, some of the data has been corrupted and needs to be found/replaced.

I need to search for the characters'--' and replace it with a long dash: '—'.

Is there a way to do this quickly with a command in terminal?

The names of the .txt files in my directory are numbered sequentially: 1.txt, 2.txt, etc.

Thanks!

回答1:

GNU sed:

sed -i 's/--/—/g' *.txt

OSX BSD sed:

You need to specify a backup file extension. To create a backup file with the extension: .txt.bak:

sed -i '.bak' 's/--/—/g' *.txt

To completely replace the files, specify an empty extension:

sed -i '' 's/--/—/g' *.txt

回答2:

sed -i 's/--/–/g' *.txt ought to work. The -i flag to sed makes it act on the files in-place, the s stands for substitute, and the g makes it replace multiple occurrences of the pattern on the same line. Look up sed's documentation for more information.

EDIT: This works on GNU/Linux; it turns out that the syntax is slightly different on OSX (see comments and accepted answer).