[Raspberry Pi][ArchLinux] Arch Linux run script after boot

1.
vim /etc/systemd/system/myscript.service

[Unit]
Description=My script

[Service]
ExecStart=/usr/local/my-script

[Install]
WantedBy=multi-user.target

chmod 755 myscript.service
systemctl enable myscript.service
systemctl start myscript.service <– try to use work or not.

2.
vim /usr/local/my-script

#!/bin/sh
insmod /lib/modules/3.12.35-1-ARCH/kernel/drivers/usb/serial/usbserial.ko.gz

insmod /lib/modules/3.12.35-1-ARCH/kernel/drivers/usb/serial/usb_wwan.ko.gz

insmod /lib/modules/3.12.35-1-ARCH/kernel/drivers/usb/serial/option.ko.gz

insmod /lib/modules/3.12.35-1-ARCH/kernel/drivers/usb/class/cdc-acm.ko.gz

insmod /lib/modules/3.12.35-1-ARCH/kernel/drivers/usb/class/cdc-wdm.ko.gz 

insmod /lib/modules/3.12.35-1-ARCH/kernel/drivers/net/usb/cdc_ether.ko.gz

chmod 755  /usr/local/my-script

Reference:

• systemd FAQ
• Arch Linux run script a minute after boot