用于删除超过 n 天的目录的 Shell 脚本

问题描述：

我的目录命名为:

2012-12-12
2012-10-12
2012-08-08

如何使用 bash shell 脚本删除超过 10 天的目录?

How would I delete the directories that are older than 10 days with a bash shell script?

答

这将递归地为您完成:

find /path/to/base/dir/* -type d -ctime +10 -exec rm -rf {} ;

说明:

find:用于查找文件/目录/链接等的unix命令
/path/to/base/dir:开始搜索的目录.
-type d:只查找目录
-ctime +10:只考虑修改时间超过10天的
-exec ... ;:对于找到的每个这样的结果，在...
rm -rf {}:递归强制删除目录；{} 部分是将查找结果替换为前一部分的位置.

find: the unix command for finding files / directories / links etc.
/path/to/base/dir: the directory to start your search in.
-type d: only find directories
-ctime +10: only consider the ones with modification time older than 10 days
-exec ... ;: for each such result found, do the following command in ...
rm -rf {}: recursively force remove the directory; the {} part is where the find result gets substituted into from the previous part.

或者，使用:

find /path/to/base/dir/* -type d -ctime +10 | xargs rm -rf

哪个更有效率，因为它相当于:

Which is a bit more efficient, because it amounts to:

rm -rf dir1 dir2 dir3 ...

相反:

rm -rf dir1; rm -rf dir2; rm -rf dir3; ...

就像在 -exec 方法中一样.

as in the -exec method.

使用现代版本的 find，您可以将 ; 替换为 + 并且它会执行与 xargs 为您调用，传递适合每个 exec 系统调用的尽可能多的文件:

With modern versions of find, you can replace the ; with + and it will do the equivalent of the xargs call for you, passing as many files as will fit on each exec system call:

find . -type d -ctime +10 -exec rm -rf {} +

用于删除超过 n 天的目录的 Shell 脚本

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