Install zotero in a debian/linux system. It assumes each version is installed in /opt/zotero (so that this folder exists previously)

install_zotero.sh

#! /bin/bash

tmp="/tmp/zotero"
platform="linux-$(uname -m)"



mkdir -p $tmp


version=$(echo "https://www.zotero.org/download/" | 
	wget -O- -i- -q |
	grep -w ".*ZoteroWebComponents.Downloads.*" |
	grep -o "\"$platform\":\".*\"" |
	grep -o -E "[0-9]+\.[0-9]+\.[0-9]+")


v0=$(echo $version | grep -o -E "^[0-9]+")

url="https://download.zotero.org/client/release/$version/Zotero-${version}_$platform.tar.bz2"

wget -q -N -P "$tmp" $url

tar xf "$tmp/Zotero-${version}_$platform.tar.bz2" -C "$tmp/"

folder=$(ls "$tmp" | grep -v "\.tar\.bz2")

mv -f "$tmp/$folder" "$tmp/zotero$v0"

sfolder="$tmp/zotero$v0"
tfolder="/opt/zotero"
ofolder="/opt/zotero/zotero$v0"

if [ -d "$ofolder" ]; then
	su -c "rm -r $ofolder; mv -f $sfolder $tfolder" -m "root"
else
	su -c "mv -f $sfolder $tfolder" -m "root"
fi


source "$tfolder/zotero$v0/set_launcher_icon"

ln -f "$tfolder/zotero$v0/zotero.desktop" "$HOME/.local/share/applications/zotero$v0.desktop"

sed -i "s/Name=Zotero/Name=Zotero$v0/g" $HOME/.local/share/applications/zotero$v0.desktop
sed -i "s|Exec=.*|Exec = bash -c \"/opt/zotero/zotero$v0/zotero -url %U\"|g" $HOME/.local/share/applications/zotero$v0.desktop