is it nessesary to use string like that
cgminer -o stratum+tcp://solo.ckpool.org:3333 -u 1PKN98VN2z5gwSGZvGKS2bj8aADZBkyhkZ.0 -p x
or
cgminer -o stratum+tcp://solo.ckpool.org:3333 -u 1PKN98VN2z5gwSGZvGKS2bj8aADZBkyhkZ -p x
is ok?
Either will work, but the former with the
.{{worker-name}}
will allow you to see work contributed by miner in your stats, and is often better for troubleshooting, if you have more than one miner.