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#! /bin/bash
 
# File name: purgedeinstall.sh
 
# Files need to be in $HOME (/root)
# Cancel the purge and install files which not need to be purged first
# Run as root
 
# Check if aptitude is running
ps -e | grep aptitude > /dev/null 2>&1
exitcode=$?
if [[ $exitcode -eq 0 ]]; then
  echo aptitude is running. Please close aptitude and then run this script again. Thanks.
  exit 9
fi
 
# Deinstall packages with state deinstall found with dpkg --get-selections
dpkg --get-selections | grep deinstall | tr -s '\011' | tr '\011' '\n' | sort > $HOME/purgesort.txt
 
if [[ -s $HOME/purgesort.txt ]]; then
        # Remove the lines with 'deinstall'
        grep -v deinstall $HOME/purgesort.txt > $HOME/purgelist.txt
        cat $HOME/purgelist.txt
        cat $HOME/purgelist.txt | tr '\n' ' ' > $HOME/purge.txt
        while true; do
            read -p "Do you wish to purge those packages? [YN] " yn
            case $yn in
                [Yy]* ) xargs aptitude purge --assume-yes --purge-unused < $HOME/purge.txt
                        break;;
                [Nn]* ) exit;;
                * )     echo "Please answer 'Yes' or 'No'.";;
            esac
        done
else
        echo No packages to purge.
fi

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