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In place update is the easiest approach to updating iGp12 systems to the new IOC and gateware versions. This method should work on all currently deployed systems. Here is a brief description of the update procedure:

1. Using scp, copy update script package to the IOC
2. Optionally, copy an appropriate FPGA bit file to the IOC
3. Connect to the IOC via ssh
4. Execute the update: # bash update_script_package.sh [GATEWARE]. Optional gateware file name allows one to substitute a different FPGA bit file instead of the one within the package.
5. That is it!

During the update unit will reboot twice and return to operation with the EPICS IOC and all attendant processes running. The following elements are preserved in the update process:

• Network configuration (/etc/network/interfaces)
• Host name (/etc/hostname)
• Hosts list (/etc/hosts)
• DNS configuration (/etc/resolv.conf)
• NTP configuration (/etc/ntp.conf)
• Timezone (/etc/TZ)
• System ID (/iGp/sysid)
• Device ID (/iGp/devid)