my.zsh/lib/utils.zsh

pid_for() {
    echo $(ss -lptn "sport = :$1")
    echo "---------\n"
    echo $(netstat -nlp | grep ":$1")
    echo "---------\n"
    echo $(lsof -n -i ":$1" | grep LISTEN)

}

intersect_files() {
    comm -23 <(cat $1) <(cat $2)
}