How to automate Cisco 2960 IOS upgrade for free?

Question

Automation

The company has more than 20 cisco 2960-S(X) want to automate the update. As I see it:
- I put the firmware in the folder
- at 3 o'clock in the morning cisco reboots
Are there any options? preferably free.
Ps Cisco Network Assistant does not update normally. Well, or my hands are from ...

Answer 1

Write a Python script: https://natenka.gitbooks.io/pyneng/
Or execute commands via telnet using a script.
Or manage via SNMP using a script.
If you want to write less with your hands, read the chapter about Ansible
PS
Only 20? You can also manually update. Firmware is rarely released.
PPS
To restart a tsiska at a specified time, there is a reload in command