last-whois-cymru.sh

#!/bin/sh -e

#
# This was tested with Debian Linux 8 and 9
#
# (The arguments for the `last` command will not work with macOS/Darwin)
#
# $ last -adFi
# jps3     pts/0        Sun Dec  2 18:55:37 2018   still logged in                       172.16.2.70
# XXXXXX   pts/0        Sun Dec  2 17:23:21 2018 - Sun Dec  2 17:25:29 2018  (00:02)     10.10.219.245
# YYYYYY   pts/1        Sun Dec  2 13:36:26 2018 - Sun Dec  2 15:49:48 2018  (02:13)     192.168.107.24
# 
#

PATH=/bin:/usr/bin

\last -adFi                                    | \
  \awk 'BEGIN { printf("begin\nverbose\n") }; 
              { print $NF                  }; 
        END   { printf("end\n")            }'  | \
  \nc whois.cymru.com 43

exit 0