1.复制sublime-merge.desktop文件为：navicat.desktop:

2.修改:navicat.desktop Icon路径/home/qing/Pictures/navicat-icon.png，保存

[Desktop Entry]
Type=Application
Name=Navicat Premium 15
GenericName=Database Development Tool
Icon=/home/qing/Pictures/navicat-icon.png
Exec=/data/soft/navicat/xxxxxx
Categories=Development;
Keywords=database;sql;

 发现icon没有生效，是不是有缓存？求助大佬，谢谢！