如何在Unix中文件的每一行末尾添加100个空格 [英] How to add 100 spaces at end of each line of a file in Unix

问题描述

我有一个文件，该文件应该每行包含200个字符.我收到的源文件每行只有100个字符.我现在需要为每行添加100个额外的空格.如果只有几个空格，我们可以像这样使用sed:

I have a file which is supposed to contain 200 characters in each line. I received a source file with only 100 characters in each line. I need to add 100 extra white spaces to each line now. If it were few blank spaces, we could have used sed like:

 sed 's/$/     /' filename > newfilename

既然有100个空格，谁能告诉我可以在Unix中添加吗?

Since it's 100 spaces, can anyone tell me is it possible to add in Unix?

推荐答案

如果您希望每行固定n个字符(不相信输入文件每行有确切的m个字符)，请按照以下步骤操作.对于每行字符数不同的输入文件:

If you want to have fixed n chars per line (don't trust the input file has exact m chars per line) follow this. For the input file with varying number of chars per line:

$ cat file
1
12
123
1234
12345

每行扩展到10个字符.

extend to 10 chars per line.

$ awk '{printf "%-10s\n", $0}' file | cat -e

1         $
12        $
123       $
1234      $
12345     $

显然在脚本中将10更改为200.这里的$显示了行尾，它不是字符.您不需要cat -e，这里只是显示行已扩展.

Obviously change 10 to 200 in your script. Here $ shows end of line, it's not there as a character. You don't need cat -e, here just to show the line is extended.

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