ubuntu18.04: 計算器打開失敗問題分析即解決（error while loading shared libraries: libgtk-3.so.0）
$ gnome-calculator
/snap/gnome-calculator/544/usr/bin/gnome-calculator: error while loading shared libraries: libgtk-3.so.0: cannot open shared object file: No such file or directory
用 ldd /snap/gnome-calculator/544/usr/bin/gnome-calculator 命令發現一個not found so庫
$ ldd /snap/gnome-calculator/544/usr/bin/gnome-calculator | grep "not found"
libgtksourceview-4.so.0 => not found
解決辦法：
卸載再重新安裝：
sudo apt remove gnome-calculator
sudo apt install gnome-calculator