Hi,I have come accross the erros as below:

[ssh@Nick aa]$ mkdir a
[ssh@Nick aa]$ find -name 'a' -ls
272665 4 drwxr-xr-x 2 ssh nick 4096 Mar 26 10:50 ./a
[ssh@Nick aa]$ find -name 'a' -exec rmdir {} \;
find: `./a': No such file or directory
[ssh@Nick aa]$ ls
list md md1 test

I have create a folder and when I find and rmdir it,it turns out as No such file or directory but it exactly remove the empty directory.
Can anybody tell me why ?

The find command has no notion of what the program invoked by "-exec" is going to do, and the normal behavior of find is to recurse into any directories it encounters. So, find evaluates the expression "-name 'a' -exec rmdir {} \;" and then attempts to recurse into the directory "./a" it just found.

When you are going to have find removing things, it's usually advisable to use the "-depth" option to cause find to recurse into a directory before preforming any action on the directory itself. In fact, that is essential if you want find to remove a directory that needs to have its contents deleted before the directory itself can be removed. That would have happened automatically if you had used the "-delete" action instead of "-exec rmdir ...", since "-depth" is implied by "-delete".

Noted,thank you