我已经尝试了一段时间，但我无法让杯子停留，或者我做错了什么，请帮忙。这是我在进行 HPLIP 安装时得到的结果。我已经浏览过这个论坛，了解如何让杯子停留，但它仍然不允许我这样做。结果如下：
MISSING DEPENDENCIES
--------------------
Following dependencies are not installed. HPLIP will not work if all REQUIRED dependencies are not installed and some of the HPLIP features will not work if OPTIONAL dependencies are not installed.
Package-Name Component Required/Optional
cups base REQUIRED
Do you want to install these missing dependencies (y=yes*, n=no, q=quit) ? y
INSTALL MISSING REQUIRED DEPENDENCIES
-------------------------------------
note: Installation of dependencies requires an active internet connection.
warning: Missing REQUIRED dependency: cups (CUPS - Common Unix Printing System)
CHECKING FOR NETWORK CONNECTION
-------------------------------
Network connection present.
RUNNING PRE-PACKAGE COMMANDS
----------------------------
sudo dpkg --configure -a (Pre-depend step 1)
sudo apt-get install --yes --force-yes -f (Pre-depend step 2)
sudo apt-get update (Pre-depend step 3)
OK
DEPENDENCY AND CONFLICT RESOLUTION
----------------------------------
Running 'sudo apt-get install --assume-yes libcups2'
Please wait, this may take several minutes...
error: A required dependency 'cups (CUPS - Common Unix Printing System)' is still missing.
RUNNING POST-PACKAGE COMMANDS
-----------------------------
OK
RE-CHECKING DEPENDENCIES
------------------------
error: A required dependency 'cups (CUPS - Common Unix Printing System)' is still missing.
error: Installation cannot continue without this dependency.
error: Please manually install this dependency and re-run this installer.
要求的输出：
$ apt-cache policy cups
cups:
Installed: 2.2.7-1ubuntu2.1
Candidate: 2.2.7-1ubuntu2.1
Version table:
*** 2.2.7-1ubuntu2.1 500
500 us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
500 us.archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages
100 /var/lib/dpkg/status
2.2.7-1ubuntu2 500
500 us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
跑步时sudo apt-get install -f我什么都得不到。