Bitcoin Forum

Running on Ubuntu not sure how to pass parameters to the bitcoin-cli -verifychain command.  Works fine with curl or programmatic interface, but not sure how to just type it in at the prompt and have it work. 
I see it takes two parameters which I would like to pass in on the command line.

AFAIK it should just take the two positional arg's numeric values right after the command, each separated by whitespace.

You can also try to use --named arg and specify the command parameters' names.

Like for example:

$bitcoin-cli --named verifychain checklevel=1 nblocks=0

OK that works great.  When I run the verifychain with any parameter it always returns true, except when nblocks=0 which specifies it should read all blocks.  When nblocks=0 it always returns false.  Also larger numbers return false.  Would it be some kind of timeout issue?

I am trying to track this down.  getblockchaininfo looks good.   verifychain with higher block counts returns false with error: null.  Not really sure what the cause might be.  sample run for 4, 500.
response follows:

Check you recent 'debug.log' entries for more detailed result. (located in bitcoin datadir)

The lines related to verifychain command should start from "Verifying last <N> blocks at level <N>" line to "Verification: <message>" result.
The "nBlocks" and "verification level" should match the command that returned that 'error: null' response.

Thank you, found the pertinent info in the debug.log.