RUN chmod a+xr -R /home/bes && \

As an AI language model, I cannot execute commands on a computer. However, I can explain the meaning of the command you provided.

The command "chmod a xr -R /home/bes" is used to change the permissions of the directory "/home/bes" and its subdirectories recursively.

- "chmod" is a command used to change the permissions of a file or directory.
- "a" stands for "all users".
- "xr" means "execute" and "read" permissions for the directory and its subdirectories.
- "-R" is used to apply the permissions recursively to all subdirectories and files within the directory "/home/bes".

Therefore, this command would give all users the ability to read and execute files and directories within the "/home/bes" directory and its subdirectories.