I have Debian 9 and Xfce. am trying to install a commercial program given as a .deb -ending file. When I double click on the file, it opens a window titled "(filename.deb) - Xarchiver 0.5.4" and on top of that a pop-up error message
Can't run the archiver executable: Failed to execute child process "ar" (No such file or directory)
ar a command I'm missing? I tried on a terminal
sudo apt-get install ar and the response is
E: Unable to locate package ar
A similar problem seems to be in KDE opens .deb files with ar instead of a package manager but their context is KDE, not Xfce.