bash 在行尾添加 sed
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Add at the end of the line with sed
提问by Open the way
given a plain text document with several lines like:
给定一个包含几行的纯文本文档，例如：
c48 7.587 7.39
c49 7.508 7.345983
c50 5.8 7.543
c51 8.37454546 7.34
I need to add some info 2 spaces after the end of the line, so for each line I would get:
我需要在行尾添加一些信息 2 个空格，所以对于每一行我都会得到：
c48 7.587 7.39 def
c49 7.508 7.345983 def
c50 5.8 7.543 def
c51 8.37454546 7.34 def
I need to do this for thousands of files. I guess this is possible to do with sed, but do not know how to. Any hint? Could you also give me some link with a tutorial or table for this cases?
我需要为数千个文件执行此操作。我想这可能与 sed 有关，但不知道如何操作。任何提示？你还可以给我一些关于这种情况的教程或表格的链接吗？
Thanks
谢谢
回答by ghostdog74
if all your files are in one directory
如果所有文件都在一个目录中
sed -i.bak 's/$/ def/' *.txt
to do it recursive (GNU find)
递归执行（GNU find）
find /path -type f -iname '*.txt' -exec sed -i.bak 's/$/ def/' "{}" +;
you can see herefor introduction to sed
你可以在这里看到sed 的介绍
Other ways you can use,
您可以使用的其他方式，
awk
awk
for file in *
do
awk '{print for file in *
do
while read -r line
do
echo "$line def"
done < $file >temp
mv temp $file
done
" def"}' $file >temp
mv temp "$file"
done
Bash shell
Bash 外壳
for file in ${thousands_of_files} ; do
sed -i ".bak" -e "s/$/ def/" file
done
回答by Chen Levy
The key here is the search-and-replace s///command. Here we replace the end of the line $with 2 spaces and your string.
这里的关键是搜索和替换s///命令。在这里，我们将行尾替换为$2 个空格和您的字符串。
Find the sed documentation at http://sed.sourceforge.net/#docs
在http://sed.sourceforge.net/#docs 上找到 sed 文档
