/tmp 的permission是rwxrwxrwt
chmod 0777 /abc rwxrwxrwx
chmod 777 /abc rwxrwxrwx
chmod 1777 /abc rwxrwxrwt
The “t” character in your permission indicates that only the user (and the root) that has created the file inside of /tmp folder can delete/modify that specific file.
suppose
