从文本文件中删除最后 2 个字符:shell 脚本 [英] delete the last 2 characters from a text file: shell script

问题描述

我需要从 shell 脚本中的文本文件中删除最后 2 个字符.知道我该怎么做吗?

I need to delete the last 2 characters from a text file in shell script. Any idea about how I can do it?

推荐答案

使用 sed 删除最后一行 only 的最后两个字符:

Delete the last two characters on the last line only with sed:

$ sed '$s/..$//' file

如果您对更改感到满意，请使用 -i 将它们存储回文件:

If you are happy with changes then use -i to store them back to the file:

$ sed -i '$s/..$//' file

如果你想删除每一行的最后两个字符，它会是:

If you wanted to delete the last two characters on every line it would be:

$ sed 's/..$//' file

再次使用 -i 将更改存储回文件:

Again use -i to store the changes back to the file:

$ sed -i 's/..$//' file

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