我如何安装 ike 包 (shrew soft vpn)？我尝试使用命令suto apt install ike，但它对我不起作用。输出是：
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ike
我尝试使用以下命令使用 deb 包：
sudo dpkg -i ike-qtgui_2.2.1+dfsg-6_amd64.deb
但它不起作用：
Selecting previously unselected package ike-qtgui.
(Reading database ... 162541 files and directories currently installed.)
Preparing to unpack ike-qtgui_2.2.1+dfsg-6_amd64.deb ...
Unpacking ike-qtgui (2.2.1+dfsg-6) ...
dpkg: dependency problems prevent configuration of ike-qtgui:
ike-qtgui depends on ike; however:
Package ike is not installed.
ike-qtgui depends on libqtcore4 (>= 4:4.7.0~beta1); however:
Package libqtcore4 is not installed.
ike-qtgui depends on libqtgui4 (>= 4:4.5.3); however:
Package libqtgui4 is not installed.
dpkg: error processing package ike-qtgui (--install):
dependency problems - leaving unconfigured
Processing triggers for gnome-menus (3.36.0-1ubuntu1) ...
Processing triggers for desktop-file-utils (0.24-1ubuntu2) ...
Processing triggers for mime-support (3.64ubuntu1) ...
Processing triggers for man-db (2.9.1-1) ...
Errors were encountered while processing:
ike-qtgui