How to remove wrong value from nvram?

[Igor]

RT-AX68U fw Merlin 386.4. I see wrong value in nvram

# nvram show | grep sshd
...
sshd_authkeysjBWlBI+BSlX7jHcj7qjg5sIp4sscfUfe1KWIF0bOucMq8AvwNiyDVwJdeXSTL4u2Npji1FCRPAAsHmOAtIxPZv0KQ2AqAOU/FxjOaa2DG20=garry@MyHomeAssistant
...

Trying to delete.

# nvram unset sshd_authkeysjBWlBI+BSlX7jHcj7qjg5sIp4sscfUfe1KWIF0bOucMq8AvwNiyDVwJdeXSTL4u2Npji1FCRPAAsHmOAtIxPZv0KQ2AqAOU/FxjOaa2DG20=garry@MyHomeAssistant

Not deleted.

# nvram savefile test
# nano test
(delete line)
# nvram loadfile test
# nvram commit

Not deleted.

I have a longer wrong value

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQCgFMsRSAXQj8s7JceAdX3DzGSjJzIa+wtMAFwpjoqqbIJHpHzyBbSO5t4hJmL4O8HNuGoCkv2L72Znt0h7HTOk2NjGAWYrHMFee/rwaO5KDkGfVIPBHFqsUH/QR2HDd12Ix++jZGgttMx3TuL8yXsS4Zebc0QTpzq/NMG9CQvsPgj7cP0iOP3KZll3n/H2WtLq1zDRDoSOksX+4MDjslQxskN90e34DLwsIbrGaRoi ...

How to remove wrong value from nvram?

 

[eibgrad]

Go to Administration > System > SSH section and install correct public (Authorized) key(s) then Save.

 

[Igor]

The GUI shows the correct keys. Same as "sshd_authkeys=" nvram section. I'm talking about the erroneous value of nvram. It has nothing to do with correct value "sshd_authkeys=".

 

[eibgrad]

Then set nvram variable to null and start over w/ GUI.

nvram set sshd_authkeys=''
nvram commit

 

[Igor]

nvram set sshd_authkeys=''
nvram commit
nvram show | grep ssh-
size: 78756 bytes (52316 left)
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQCgFMsRSAXQj8s7JceAdX3 [skip]

 

[eibgrad]

Why grep ssh- ?? That could be from some other variable. Show me the variable.

nvram get sshd_authkeys

 

[eibgrad]

If grep'ing ssh- returned something, then it looks like you accidentally installed ssh-rsa as a variable (I don't have such a variable on my system). If that's the case, you can null it as well.

 

[Igor]

@RT-AX68U-92A0:/tmp/home/root# nvram get sshd_authkeys

@RT-AX68U-92A0:/tmp/home/root#

 

[eibgrad]

@RT-AX68U-92A0:/tmp/home/root# nvram get sshd_authkeys

@RT-AX68U-92A0:/tmp/home/root#

Then the Authorized Keys field on Administration->System->SSH should now be empty. Add your key(s) back there and Save.

 

[Igor]

I have two identical routers. One of them has entry which is like value. I can't delete it in any way.

 

[Igor]

If that's the case, you can null it as well.

How to do it?

 

[dave14305]

nvram unset "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQCgFMsRSAXQj8s7JceAdX3"

But include all the characters up to the = sign before garry. Do not include the equal sign.

 

[eibgrad]

nvram unset "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQCgFMsRSAXQj8s7JceAdX3"

But include all the characters up to the = sign before garry. Do not include the equal sign.

Ah, finally realized the OP has created a variable by the same name as the key!

While it should be removed, I don't see why it should cause issues w/ getting the Authorized Keys field configured properly.

 

[Igor]

But include all the characters up to the = sign before garry. Do not include the equal sign.

Does not work. I put this long variable in double quotes - I can't delete it. Single quotes can't be removed either.

 

[Igor]

Ah, finally realized the OP has created a variable by the same name as the key! LOL

Yes. Two long names that I can't remove.

 

[dave14305]

I would just reset to defaults and start over. or restore a good backup before this issue started.

 

[Igor]

But include all the characters up to the = sign before garry. Do not include the equal sign.

Thanks! It happened.