chmod command. The attributes are read/write/execute for root/user/group with the values being 4-2-1,4-2-1,4-2-1.
To give everyone execute only access to a file, you'd
For all permissions, it'd be
Root only r/w/x would be
chmod +x application
More guides and articles can be found here.
Some scripts require that the files are set to executable (chmod 755) and this guide will help you. Telnet
In this example we're going to use WS FTP, but you can use any other FTP software that support chmod UNIX.