post_install(){
    post_upgrade
}
post_upgrade(){
    cat << EOF
    This is the core of Clash Meta by MetaCubeX forked from Clash by Dreamacro.
    You can find the manual at https://github.com/Dreamacro/clash/wiki/configuration
    Home directory clash-meta.service at /etc/clash-meta
    User home directory ~/.config/clash by default
EOF

}