wireshark在ubuntu系统中的正确安装方法

　　之前一直在使用wireshark这个网络工具，最近在用来抓包学习MQTT协议的时候，发现wireshark暂时还未加入对MQTT协议分析的原生支持，网上搜了一下，能够本身用插件的形式扩展wireshark的协议支持，可是几经周折以后发现原来我安装wireshark的方式有问题，以非root用户启动wireshark后发现没权限获取网卡使用权；以root用户启动后会提示风险，禁用某些功能，好比插件功能就是有问题的。

　　It dosn't work well on ubuntu14.04 (actually before 16.04).It warns:

(wireshark:5785): Gtk-CRITICAL **: gtk_orientable_get_orientation: assertion 'GTK_IS_ORIENTABLE (orientable)' failed

(wireshark:5785): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkScrollbar'

(wireshark:5785): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkWidget'

(wireshark:5785): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject'

　　solution: set the environment variable "LIBOVERLAY_SCROLLBAR" to "0"

　　一、sudo vim /usr/share/applications/wireshark.desktop

　　２、change "Exec=wireshark %f" to "Exec=env LIBOVERLAY_SCROLLBAR=0 wireshark %f"

 

　　正确安装wireshark的方法是：

$ sudo apt-get install wireshark
$ sudo dpkg-reconfigure wireshark-common
$ sudo usermod -a -G wireshark $USER
$ sudo reboot