Originally Posted by Schturman

death_jax, I found solution for checking command in the tweak
instead:

Code:

dpkg -l aegisctl > /dev/null 2>&1; echo $?

we can use:

Code:

dpkg-query -W -f='${Status}\n' aegisctl | grep installed | awk '{print $3}' | head -1

The output we will get:

Code:

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:~#

or

Code:

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:~#