如何删除文件最后一行的最后一个字符？ [重复]

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How can I remove the last character of a file in unix? 8 answers

如何在unix中删除文件的最后一个字符? 8个答案

I have this set of lines in a file:

我在文件中有这组行:

{info},
{info},
{info},
{info},

and I want the file like this without the last ",":

我想要这样的文件没有最后一个“,”:

{info},
{info},
{info},
{info}

How can I do it in bash? Any idea?

我怎么能用bash做呢?任何的想法?

2 个解决方案

#1

You can use sed:

你可以使用sed:

sed '$ s/.$//' your_file

First $ is to tell sed to match only last line

第一个$是告诉sed只匹配最后一行

s is for "substitute", note the empty string between the two last /s

s代表“替代”,注意两个最后/秒之间的空字符串

.$ is a regex that matches the last character in the file

。$是与文件中最后一个字符匹配的正则表达式

Note that you can use whatever separator you want instead of /, for example you can rewrite the expression:

请注意,您可以使用您想要的任何分隔符而不是/,例如,您可以重写表达式:

sed '$ s-.$--' your_file

#2

In vim, you could use :substitute or :s to do this as well. It's a vim-built in -- you can read about it here http://vim.wikia.com/wiki/Search_and_replace

在vim中,您可以使用:substitute或:s来执行此操作。这是一个vim内置 - 你可以在这里阅读它http://vim.wikia.com/wiki/Search_and_replace

The syntax is very similar to the other posted solution, you'd go into the command mode and type in :$s/.$//g

语法与其他发布的解决方案非常相似,您将进入命令模式并键入:$ s /.$// g

#1