How to Fix Unison 6.2 VM's issue where lmhostid returns "" and not mac address

edit /etc/udev/rules.d/70-persistent-net.rules

it contains:

# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.

# PCI device 0x8086:0x100f (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:aa:6d:77", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

just change NAME= to NAME="eth0", keep the rest as is.

edit /etc/sysconfig/network-scripts/ifcfg-eth0

it contains:

DEVICE="eth0"

BOOTPROTO="dhcp"

HWADDR="00:0C:29:AA:6D:77"

DOMAIN="ltx.com ltx-credence.com ltxc.com"

IPV6INIT="no"

IPV6_AUTOCONF="yes"

NM_CONTROLLED="no"

ONBOOT="yes"

TYPE="Ethernet"

make sure the HWADDR is set to correct mac address. you can get mac address from call to ifconfig

restart the system

GEM FAQ's

How to enable GEM in Unison/CentOS

• SECS/Gem is initially disabled in Unison. To enable SECS/Gem in Unison, you will need to run the config_gem command from xterm. This command is found in the /ltx/com directory. 
• config_gem <tester_name> [-enable|-disable] [-verbose] [-reset]
• The execution of config_gem tool will create the gem_config file for CGem in the tester pwrup directory
• /ltx/testers/<tester_name>/pwrup/gem_config

SECS-GEM on CentOS 7.2, U1709

• make sure to yum install the latest version. the first U1709 version release has issue on GEM component and may require update so...