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Disable WSL support for Win32 applications:
sudo bash -c "echo 0 > /proc/sys/fs/binfmt_misc/status"
Enable WSL support for Win32 applications:
sudo bash -c "echo 1 > /proc/sys/fs/binfmt_misc/status"
https://github.com/bitcoin/bitcoin/blob/master/doc/build-windows.md#building-for-64-bit-windows
Is it done in the Ubuntu WSL shell, ...
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There is no need to truncate it. You can just start Bitcoin Core with the -reindex option. If you do, it'll throw away the UTXO set and other databases, and rebuild it from the blocks you have on disk (which will be kept), up to the point where they're corrupt. It'll take a while (possibly nearly as long as synchronizing in the first place), but it won't ...
1
Bitcoin Core aggressively caches updates to the UTXO database ("chainstate") during its operation, and only occasionally flushes the resulting changes in batch to disk. This happens (a) at shutdown, (b) once per day, or (c) whenever Bitcoin Core runs out of memory (configurable with dbcache= setting).
However, when Bitcoin Core is shutdown ...
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This is not a supported feature. Only the wallet tracks total balances (per wallet even, not per address), and only does so for your own keys/addresses (including imported "watch only" keys/addresses).
Other software exists that provides this functionality.
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If you have no money, you might just install virtualbox and put a Linux node on it to download bitcoin core (details for installing this free software are in Antonopoulos' book "Mastering Bitcoin"). But this will not be fast enough to actually mine bitcoin (well it will dig but unlikely to win any blocks at the current difficulty level)--you could ...
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This is expected.
which only searches for binaries in your $PATH variable (e.g. it needs to be placed in /usr/bin or /usr/local/bin for that). If you didn't put bitcoind there, you'll need to invoke it using the pathname (e.g. ./src/bitcoind in the directory that holds it).
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What's the difference between an 'address' and an 'addressHash' in a transaction on a bitcoind node?
addressHash is the data output by pybtc. The data is a hash of the public key or script. It is contained in the address. And also parts of scriptPubkey(locking script).
For P2PKH and P2WPKH, it is Hash160(public key)
For P2SH, it is Hash160(script)
For P2WSH, it is SHA256(script)
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