删除^ H和M ^字符从一个文件中使用Linux shell脚本

How do I remove ^H and ^M characters from a file using Linux shell scripting?

如何删除^ H和M ^字符从一个文件中使用Linux shell脚本?

^[[0^H ^H^H ^H^H ^H^H ^H^H ^H^H ^H^H ^H^H ^H   rcv-packets: 0
^[[0^H ^H^H ^H^H ^H^H ^H^H ^H^H ^H^H ^H^H ^H      rcv-errs: 0
     rcv-drop: 0
     rcv-fifo: 0
     rcv-frame: 0

5 个解决方案

#1

What you're seeing there are control characters, you simply could delete them with tr

你看到的是控制字符，你可以用tr删除它们!

cat your_file |
tr -d '\b\r'

this is better:

这是更好的:

tr -d '\b\r' < your_file

#2

Two methods come to mind immediately:

两种方法立刻浮现在脑海中:

tr -d control+v control+h
tr - d控制+ v + h
sed 's/control+v control+h//g'
sed ' s /控制+ v + h / / g’

Here's both in action:

这是在行动:

$ od -c test
0000000  \b   h   e   l   l   o  \b   t   h   e   r   e  \b  \n
0000016
$ sed 's/^H//g' < test | od -c
0000000   h   e   l   l   o   t   h   e   r   e  \n
0000013
$ tr -d ^H < test | od -c
0000000   h   e   l   l   o   t   h   e   r   e  \n
0000013

#3

For removing ^M characters appearing at the end of every line, I usually do this in vi editor.

删除M ^字符出现在每一行的末尾,我通常在vi编辑器。

:%s/.$//g

It just removes the last character of every line irrespective of what the character is. This solved my provlem.

它只是去掉了每一行的最后一个字符，不管字符是什么。这解决了我的provlem。

#4

Use sed utility. See below as per examples:

使用sed效用。以下是例子:

sed 's/%//' file > newfile
echo "82%%%" | sed 's/%*$//'
echo "68%" | sed "s/%$//" #assume % is always at the end.

#5

You can remove all control characters by using tr, e.g.

你可以使用tr来删除所有的控制字符。

tr -d "[:cntrl:]" file.txt

To exclude some of them (like line endings), check: Removing control characters from a file.

要排除其中一些(比如行尾)，检查:从文件中删除控制字符。

#1