shell - Run some commands in Debian package script from current user -

how run commands in installations scripts of deb-package (preinst, postinst, prerm, postrm) not root current user (user invoked installation)?

root current user. should never expect installation of package performed sudo

you can check sudo_user environment variable user may have invoked script, if installation performed context of simple sudo dpkg -i - sudo may not have been installed, installation may have been performed su, means environment variable not set.

if want invoke scripts user invert sudo - viz:

sudo -u $sudo_user -c <command invoke> 

but need ensure know user invoked script - i.e. sudo_user root!

typically, though, because can have arbitrary number of users on linux system, should not this, leave system in state 1 user can use package. should create state/configuration on first invocation ordinary user.

finally, don't expect gui, don't expect terminal on installation if it's being shipped dpkg.