bash 我可以从终端快速搜索/替换多个 .txt 文件吗？
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Can I search/replace in multiple .txt files quickly from Terminal?
提问by Lizza
I have about 100 .txt files that contain plain text. Somehow, some of the data has been corrupted and needs to be found/replaced.
我有大约 100 个包含纯文本的 .txt 文件。不知何故，某些数据已损坏，需要找到/替换。
I need to search for the characters'--' and replace it with a long dash: '—'.
我需要搜索字符“--”并用长破折号替换它：“-”。
Is there a way to do this quickly with a command in terminal?
有没有办法在终端中使用命令快速执行此操作？
The names of the .txt files in my directory are numbered sequentially: 1.txt, 2.txt, etc.
我的目录下.txt文件的名字是按顺序编号的：1.txt、2.txt等。
Thanks!
谢谢！
回答by Steve
GNU sed:
GNU sed:
sed -i 's/--/—/g' *.txt
OSX BSD sed:
OSX BSD sed：
You need to specify a backup file extension. To create a backup file with the extension: .txt.bak:
您需要指定备份文件扩展名。要使用扩展名创建备份文件.txt.bak：
sed -i '.bak' 's/--/—/g' *.txt
To completely replace the files, specify an empty extension:
要完全替换文件，请指定一个空扩展名：
sed -i '' 's/--/—/g' *.txt
回答by ajd
sed -i 's/--/–/g' *.txtought to work. The -iflag to sedmakes it act on the files in-place, the sstands for substitute, and the gmakes it replace multiple occurrences of the pattern on the same line. Look up sed's documentation for more information.
sed -i 's/--/–/g' *.txt应该工作。该-i检举sed使得它作用于原地的文件，该s代表的替代品，并g使得它取代在同一行模式的多次出现。查阅sed的文档以获取更多信息。
EDIT:This works on GNU/Linux; it turns out that the syntax is slightly different on OSX (see comments and accepted answer).
编辑：这适用于 GNU/Linux；事实证明，OSX 上的语法略有不同（请参阅评论和接受的答案）。
