$ db2set -all
[i] DB2COMM=TCPIP
[g] DB2SYSTEM=xxxxx.xxx.xxx.xxx.xxx

$ cat /etc/hosts
xx.xx.xx.xx     xxxxx.xxx.xxx.xxx.xxx

$ cat /home/db2inst1/sqllib/db2nodes.cfg
0 xxxxx.xxx.xxx.xxx.xxx 0
$

$ db2 get dbm cfg | grep -i svce
 TCP/IP Service name                          (SVCENAME) = DB2_db2inst1
 SSL service name                         (SSL_SVCENAME) =
$ fgrep DB2_db2inst1 /etc/services
DB2_db2inst1    60006/tcp
DB2_db2inst1_1  60007/tcp
DB2_db2inst1_2  60008/tcp
DB2_db2inst1_3  60009/tcp
DB2_db2inst1_4  60010/tcp
DB2_db2inst1_END        60011/tcp
$