one solution:
1.sudo apt-get update //(更新目录)
2.sudo apt-get upgrade //(更新文件)
3.sudo apt-get dist-upgrade //(更新依赖关系)
two solution:
Change the source of ubuntu
one solution:
1.sudo apt-get update //(更新目录)
2.sudo apt-get upgrade //(更新文件)
3.sudo apt-get dist-upgrade //(更新依赖关系)
two solution:
Change the source of ubuntu