Hello, your problem may be in conflict with Java's keytool tool. How did you install the platon node? PPA or source code compilation? If you are installing PPA, you can check whether the installed version is version 0.12.1 through the command, command: platon version. If the source code is compiled, is there a copy of the latest 0.12.1 executable file keytool to your platon-node directory, execute the command in the platon-node directory: mkdir -p ~/platon-node/data &&. /keytool genkeypair | tee >(grep "PrivateKey" | awk'{print $2}'> ./data/nodekey) >(grep "PublicKey" | awk'{print $3}'> ./data/nodeid)

from docs.

by PPA ,install failed

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package platon0.12.1
E: Couldn't find any package by glob 'platon0.12.1'
E: Couldn't find any package by regex 'platon0.12.1'

from docs.

Are you a ubuntu18.04 system? If it is ubuntu18.04, is there a PPA source added? If there is a PPA source added, has it been updated?

#Add PPA source and update
$ sudo add-apt-repository ppa:ppatwo/platon
$ sudo apt-get update
#View the platon version that can be installed
$ sudo apt search platon

Install platon0.12.1

$ sudo apt install -y platon0.12.1

from docs.

No, actually I'm 16.04.And I added the PPA source also updated.

from docs.

Sorry, the current PPA package is only compatible with ubuntu18.04 system, please update to ubuntu18.04 if conditions permit.

from docs.

So if conditions not permitted, is there any other way ?

from docs.

Sorry, because our PlatON is based on ubuntu18.04, all verifications are completed. If you use other versions of the system, there is no guarantee that other problems will occur.

from docs.

OK, thanks

from docs.