Execute the command which display login name, the name of your terminal and date and time of since user logged in.
$ who ************* Output ************* mca221 pts/3 Sep 13 15:52 (128.66.203.41) mca246 pts/2 Sep 13 15:58 (128.66.203.18) mca238 pts/20 Sep 13 16:00 (128.66.203.24) mca234 pts/14 Sep 13 16:01 (128.66.203.13) mca211 pts/16 Sep 13 16:03 (128.66.203.23) mca215 pts/24 Sep 13 16:03 (128.66.203.25) mca213 pts/26 Sep 13 16:14 (128.66.203.11) mca223 pts/31 Sep 13 16:15 (128.66.203.19) bca2141 pts/8 Sep 13 16:44 (128.66.103.36) bca2104 pts/39 Sep 13 17:09 (128.66.103.8) mca203 pts/18 Sep 13 17:12 (128.66.203.21) bca2095 pts/12 Sep 13 17:14 (128.66.103.11) bca2002 pts/27 Sep 13 17:15 (128.66.103.23) mca258 pts/17 Sep 13 17:19 (128.66.203.14) mca230 pts/0 Sep 13 17:40 (128.66.203.12) mca216 pts/4 Sep 13 17:41 (128.66.203.6)