Manually install RetroArch Cores on Linux

#list cores in repose
aptitude search libretro

#install wanted cores
sudo apt install libretro-snes9x libretro-bsnes-mercury-balanced libretro-nestopia

#manually download and install ROMS not in repose
#!/bin/bash
core_dir="/usr/lib/x86_64-linux-gnu/libretro/"
sudo mkdir -p $core_dir
sudo chmod 777 $core_dir

list="$(wget -qO- "https://buildbot.libretro.com/nightly/linux/x86_64/latest/")"
list="$(echo $list|tr '"' "\n"|grep '.zip'|grep -v class)"
list="$(echo $list|tr ' ' "\n"|while read f;do basename $f;done)"
core="$(echo $list|tr ' ' "\n"|fzf --prompt "Select a Core: ")"
[[ $core ]] || exit

url="https://buildbot.libretro.com/nightly/linux/x86_64/latest/$core"
wget "$url" -cO /tmp/$core
unzip /tmp/$core -d $core_dir
chmod +x $core_dir/$core