Long time no hear…

So have not updated things for a while. Well it was an interesting few years. Now latest focus in my life has become Xamarin Forms Mobile development and Unity3D development. One is professional and one is for personal growth reasons as well as potentially professional benefit.

With the imminent release of Visual Studio 2019 in April 2019 and Unity3D 2019 I am curious how these tools will develop to help developers work more efficiently. With Xamarin Forms 4 just around the corner as well and fast paced releases of Xamarin Forms 3.X versions one can find it a bit overwhelming at times trying to keep abreast of latest features. I guess being a developer has never been harder but also most exciting.

Alas I won’t bore people with details but I will try to work on new projects and of course share more of things that I discover along the way.

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Centos 6/7 network issues after moving VM to another Hyper-V server

Well moved VM ok it start OK but networking was all changed to DHCP etc. So I went through some basic steps:
nmcli d
nmcli c modify eth0 ipv4.addresses
nmcli c modify eth0 ipv4.gateway
nmcli c modify eth0 ipv4.dns
nmcli c modify eth0 ipv4.method manual
nmcli c down eth0; nmcli c up eth0
nmcli d show eth0

And still nothing. I then looked closely at the uuid and of course that changed during the move to new virtual server. Running the command:
dmidecode | grep -i uuid

this gives new uuid to replace in the /etc/sysconfig/network-scripts/ifcfg-eth0 file and now the restart of the network kicks in again.

One more thing – it is possible that under some circumstances (steps that you execute out of order) the ID of the card may change as well so always check!




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Postfix regenerate DB files

Well it’s been a while but I just had an issue – I forgot when you update password files for postfix you need to regenerate them by hand. If you ask me this should be somehow build into the postfix loader but as it is not you must manually run the POSTMAP command. So if you sepcify a “hash” followed by file name you refer to a database file.

Say you have file for storing sasl_password file so the command is postmap sasl_password

Anyway hope this reminds someone out there and saves them a bit of time from chasing you own tail.


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