在 Kali Linux 中安裝 gcin 後，登入 X Window 就會出現如下圖的錯誤訊息 
[@more@]找尋與 libappindicator3 相關的套件
# apt-cache search libappindicator3
gir1.2-appindicator3-0.1 – Typelib files for libappindicator3-1
libappindicator3-0.1-cil – CLI binding for appindicator3 using GObject introspection
libappindicator3-0.1-cil-dev – CLI binding for libappindicator3 using GObject introspection
libappindicator3-1 – allow applications to export a menu into the panel — GTK3 version
libappindicator3-dev – allow applications to export a menu into the panel — GTK3 development
安裝 libappindicator3-1 套件
# apt-get install libappindicator3-1