linux shell中判断文件的参数说明

最新推荐文章于 2023-07-04 09:44:39 发布

转载最新推荐文章于 2023-07-04 09:44:39 发布 · 494 阅读

文章标签：

#linux shell #文件操作

linux shell 专栏收录该内容

4 篇文章

订阅专栏

本文深入探讨了Linux环境下文件属性的多种检查方式，包括如何通过命令行工具如`-s`, `-f`, `-x`等快速判断文件状态，并详细解释了这些属性在实际操作中的应用。此外，文章还介绍了如何使用`diff`命令来比较两个文件的差异，以及在文件比较后的处理逻辑。旨在帮助开发者和系统管理员高效地管理和操作文件。

-a file exists.

-b file exists and is a block special file.

-c file exists and is a character special file.

-d file exists and is a directory.

-e file exists (just the same as -a).

-f file exists and is a regular file.

-g file exists and has its setgid(2) bit set.

-G file exists and has the same group ID as this process.

-k file exists and has its sticky bit set.

-L file exists and is a symbolic link.

-n string length is not zero.

-o Named option is set on.

-O file exists and is owned by the user ID of this process.

-p file exists and is a first in, first out (FIFO) special file or

named pipe.

-r file exists and is readable by the current process.

-s file exists and has a size greater than zero.

-S file exists and is a socket.

-t file descriptor number fildes is open and associated with a

terminal device.

-u file exists and has its setuid(2) bit set.

-w file exists and is writable by the current process.

-x file exists and is executable by the current process.

-z string length is zero.

是用 -s 还是用 -f 这个区别是很大的！

如果需要判断文件存在并且文件大小大于0 ，直接用参数-s即可，不需要在用awk和ls等来得到文件大小。

如果只判断文件是否存在，则用参数 -f 即可。

2个文件如果相同diff回返回0 即命令执行成功如果文件不相同则返回1
那么直接
if diff fiel1 fiel2
then
2个文件相同哦，在这里要要干嘛就干嘛
else
2个文件不相同哦，你爱干嘛就干嘛
fi