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    #linux check if a port is open

    #how to check port is open in linux

    #failed to get d-bus connection: operation not permitted

    #failed to connect to bus: no such file or directory docker

    #failed to get dbus connection docker

    #docker ubuntu systemctl

    #google chrome centos 7

    #google chrome for centos 7

    #chrome on centos

    #sed alternative

    #install chrome on centos 7.4