Install custom commands for user root at '/root/bin/'.

def server_prepare_root_bin_dir():
    '''Install custom commands for user root at '/root/bin/'.'''
    commands = ['run_backup']
    for command in commands:
        install_file_legacy(flo('/root/bin/{command}'), sudo=True)
        sudo(flo('chmod 755 /root/bin/{command}'))
        if command == 'run_backup':
            sudo('ln -snf /root/bin/run_backup /etc/cron.daily/run_backup')