It possible to hard fork a private network without resyncing chain from scratch?

I am able to hard fork my private chain into first Constantinople and than to Istanbul, please see the answer for it. My approach is: I have updated geth to its highest version I have kept the go-ethereum/params/config.go file as it is I have updated the genesis.json file by adding “constantinopleBlock”: 2862930, “petersburgBlock”: 2862930, and…

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Getting “STDERR message(s)…” message when running sp_execute_external_script SP in SQL Server 2017 using R

I recently installed SQL Server 2017 on my machine and configured both Python & R services. When running below code I am getting “STDERR” message along with the actual output. Can someone please help me understand why I’m getting that error and how to fix it? Thanks in advance. exec sp_execute_external_script @language=N’R’ , @script=N’print(R.version)’ go…

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Lost Ubuntu and ended up with Lubuntu can not use sudo apt get

I was trying probelm in upgrading the kernel and wacom CTL-472 installation on Ubuntu 18.04.3 LTS (build failure issue) I followed procedure mentioned somewhere and ended up loosing Ubuntu version. Everything changed. Login page now looks as in the attached image. Almost everything got uninstalled, for example, Chrome, Kile, Texstudio, adobe reader. I realised it…

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wacom CTL-472 installation on Ubuntu 18.04.3 LTS (build failure issue)

I tried to install drivers for wacom CTL-472 on my laptop that runs with Ubuntu 18.04.3 LTS. I tried most of the suggestions I found on internet. None of them worked. For example, I visited https://linuxwacom.github.io/ I opened https://github.com/linuxwacom/input-wacom/wiki/Installing-input-wacom-from-source I ran sudo apt-get install build-essential autoconf linux-headers-$(uname -r) and got the following output Reading package…

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Is it possible to mine bitcoins faster on CPUs with this strategy?

This guy on bitcointalk.org suggested a potentially faster method for mining bitcoins using CPUs: https://bitcointalk.org/index.php?topic=265759.0 To quote from the author: “Rather than computationally solving for SHA256(SHA256(block_header)), the approach is to solve it symbolically. What I mean by this is, rather than treating the block header input bits as 0 or 1, treat each input bit…

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