dpkg -l aegisctl > /dev/null 2>&1; echo $?
dpkg-query -W -f='${Status}\n' aegisctl | grep installed | awk '{print $3}' | head -1
RM696-21-3_PR_001:~# dpkg-query -W -f='${Status}\n' aegisctl | grep installed | awk '{print $3}' | head -1 installed RM696-21-3_PR_001:~#
RM696-21-3_PR_001:~# dpkg-query -W -f='${Status}\n' aegisctl | grep installed | awk '{print $3}' | head -1 not-installed RM696-21-3_PR_001:~#