Help FAILED (remote: unknown command)

[BroIjustwannaroot]

Hello androidforums.
I'm having a bit of a problem rooting my LG Aristo 2.
Whenever I try to execute the command "fastboot flash recovery recovery.img"
It comes up with this.

target reported max download size of 262144000 bytes
sending 'recovery' (16954 KB)...
OKAY [  0.539s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.543s

Can someone please help me with this?

 

[ocnbrze]

do you have usb debugging enabled?

 

[ocnbrze]

also what about oem unlocked?

 

[James L]

Or your fastboot files are outdated, or the file extension shows recovery.img.img

 

[James L]

Or hmm. what is the name of the recovery.img you're flashing is it named recovery.img?

 

[BroIjustwannaroot]

do you have usb debugging enabled?

Yes.

 

[BroIjustwannaroot]

also what about oem unlocked?

I have my bootloader unlocked.

Or your fastboot files are outdated, or the file extension shows recovery.img.img

It doesnt show .img.img, and the fastboot files that I downloaded were made in October of this year.

Or hmm. what is the name of the recovery.img you're flashing is it named recovery.img?

Yes, this as well.

 

[James L]

Type fastboot flash recovery then drag the recovery.img file into cmd and press enter. If that doesn't work then something else is the issue.

 

[BroIjustwannaroot]

Type fastboot flash recovery then drag the recovery.img file into cmd and press enter. If that doesn't work then something else is the issue.

Well, the phone also does run android oreo, and I want to downgrade it.
Edit: when I execute "fastboot flash recovery C:\adb\recovery.img"
I get this

target reported max download size of 262144000 bytes
sending 'recovery' (16954 KB)...
OKAY [  0.630s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.645s

 

[James L]

type fastboot getvar all and then post the results.