Ubuntu get attach command failed

Question

I opened a shell and creat a new account and use "miner.start()" than i opened a new shell and use "geth attach" command but failed， and the error message is

Fatal: Unable to attach to remote geth: dial unix /home/hzxscyq/.ethereum/geth.ipc: connect: no such file or directory

then i try "geth" and the error message is

Fatal: Error starting protocol stack: listen udp :30303: bind: address already in use

i want to know how to use geth attach?

Answer 1

The geth.ipc gets created when Geth is succesfully launched.It looks like another Geth instance is already running,which could be stopping the succesful launch.Find that Geth process and kill it.

ps -eaux | grep "geth"

Get the process id and kill that process using

kill -9 <pid>

Now invoke geth and attach to it