#!/bin/bash

#set -xv

#my test files are named
# package1 package3 package7 
#and are in this directory
packages_location=/home/userx/testpackages
Packages_2_install=( package1 package2 package3 package4 package5 package6 package7  )

length=${#Packages_2_install[@]}


is_installed()
{
      for ((  i = 0; i < ${#Packages_2_install[@]}; i++))
    {      #just check package name, by removing the path
            if [[  "${package##*/}" = "${Packages_2_install["$i"]}" ]] ; then
            {
                echo "is installed: $package"
             # remove installed package from array list
                 unset 'Packages_2_install[$i]'
            }
            fi
        }
}

while read package
do
{
is_installed
} done <<<"$(find "$packages_location" -type f )" # -name "*.deb")"

#here you install your packages, being what is left over in 
# your array of named packages you
#want to install if not installed.

#should be remaining names in array, (minus installed packages)
#package1 package3 package7

for (( i = 0 ; i < "$length" ; i++))
 {
        if [[  "${Packages_2_install[$i]}" != "" ]] ; then
        {
         echo    "${Packages_2_install[$i]}"
         #install packges here
        touch $packages_location/"${Packages_2_install[$i]}"-$((g++))



        while [[ "$?" -ne '0' ]] ;
        do
        {
            ## preform error install

            [[ "$count" -eq '3' ]] && break
            ((count++))
        }
        fi
        count=0
 }

..

#!/bin/sh

cat > pacs.txt <<_EOF_ ## create a list of desired packages to install.
pac1
pac2
pac3
pac4
pac5
_EOF_
HOSTFILE=pacs.txt
for host in $(cat $HOSTFILE) ## start check/install
do
	dpkg -s $host ## check if package is installed
	st=$?
	if [ $st -eq "0" ]; then ## if not installed... 
		apt-get install $host -y ## try to install it.
		st=$?
		if [ $st != "0" ]; then ## if error during installation...
			printf "%s\n" "Error installing $host" ## report installation error
			read pause ## wait for user interaction
		else
			printf "%s\n" "$host installed" ## if no errors installing, report.
		fi
	else
		printf "%s\n" "$host already installed" ## if already installed, report and go to next.
	fi
done
rm -rf /pacs.txt > /dev/null ## remove residual temporary created pacs list 
clear

sudo apt list --installed

#!/bin/bash


#first remove all non-needed to be 
#installed packages from list
#so it does not matter if connection
#is up or not
#then process the remaining while
#checking to see if connection
#is active or not
#then handle that accordingly
#
#
#with debian you'll have to replace your
#commands and check formatting
#
#create package installed list
#chops off version number using the first - (hyphen after reversing it)
#then puts it back in order before going to file
sudo xbps-query -l | awk '{ print $2 }' | rev |  sed 's/^[^-]*-//g' | rev > installed_list

#create a backup master list(s) if you want them

cp -v installed_list installed_list-master
cp -v check-installed_list check-installed_list-master

#function to find all installed packages
#and removes the ones that are installed from the
#check list.

is_installed()
{
      for installed in $(cat ~/check-installed_list)
      do
      {     
            if [[  "$package" = "$installed" ]] ; then
            {
                echo "is installed: $package"
                 #remove  installed package from check list
                sed -i "/"$package"/d" check-installed_list

            }
            fi
     } done
 }

while read package
do
{
is_installed
}
done < installed_list

#How to tell if wifi is up, and using the new
#modified check-installed_list
# now process what is not installed here.

#wifi connection up
if  [[  $(cat /sys/class/net/wlo1/carrier) -eq '1' ]] ; then
echo "wifi up"
fi
#hard wire
if  [[  $(cat /sys/class/net/lo/carrier) -eq '1' ]] ; then
echo "net is up"
fi
#check your /sys/class/net subdir to get your
#data into you need to use for your system

pack1=zip
installed_pack=p7zip

if [[ "$installed_pack" =~ "$pack1" ]] ; then
{
    echo "you got $installed_pack on system
$pack1 is what it is matching"
}
fi