每当我尝试使用 apt-get 执行任何操作时，无论是安装、删除、清除、更新还是升级，我总是遇到相同的错误。
ses@ses-VirtualBox:~/Downloads$ sudo apt-get install ssh
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.4.0-45 linux-headers-4.4.0-45-generic linux-image-4.4.0-45-generic linux-image-extra-4.4.0-45-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
ncurses-term openssh-server openssh-sftp-server ssh-import-id
Suggested packages:
ssh-askpass rssh molly-guard monkeysphere
The following packages will be REMOVED:
linux-image-extra-4.4.0-38-generic linux-image-extra-4.4.0-42-generic
The following NEW packages will be installed:
ncurses-term openssh-server openssh-sftp-server ssh ssh-import-id
0 upgraded, …