Interface have default method If subclass has override method, will implement override method, instead of overload method 如果实例的静态类型(compile-time type)为 superclass,动态类型(run-time t
ArchLinux System Maintenance
rch 维护使用的命令。 查看失败启动的服务 systemctl --failed 查看日志是否存在错误 journalctl -p 3 -xb pacman 缓存清理 pacman -Sc // clean cache yay -Sc pacman -Scc // delete all cache yay -Scc 删除孤立软件包 pacman -Rns $(pacman -Qtdq) 清除日志 du