删除不必要的临时文件:

sudo rm -rf /var/tmp/*  
sudo rm -rf /usr/tmp/*  

删除不必要的系统日志文件:

sudo rm -rf /var/log/*  
sudo rm -rf /var/log/messages*  
sudo rm -rf /var/log/wtmp  
sudo rm -rf /var/log/auth.log  
sudo rm -rf /var/log/boot.log  
sudo rm -rf /var/log/system.log  

删除不必要的包缓存文件:

sudo rm -rf /var/cache/yum/*  
sudo rm -rf /var/cache/pacman/*  

删除不必要的软件包文件:

sudo rm -rf /var/cache/yum/packages/*  
sudo rm -rf /var/cache/pacman/pkg/*  

清理系统缓存文件:

sudo systemctl cacheclean  

清理系统缓存:

sudo systemctl recycle