Sure...

From this guide:

The chmod command allows you to set the permissions of a file or directory. It recognises three letters that mean who you want to set the permissions for;

chmod u  - for user (that means you!)
chmod g  - for group (e.g. CSAI)
chmod a  - for all (the whole world)

Then you tell it whether to add or takeaway permissions for those people;

chmod u+x  - to make a file executable for you
chmod a+x  - to make a file executable for the whole world

chmod u+r  - to make a file readable for you
chmod a+r  - to make a file readable for the whole world i.e. \'world readable\'

Chmod 755 means:
-Owner can read, write, and execute
-Groups can Read and Execute
-Public can Read and Execute

Chmod 777 means:
-Owner can read, write, and execute
-Groups can read, write, and execute
-Public can read, write, and execute

If you don\'t want to use the SSH chmod command, you can use most FTP programs to chmod something.