无法从 Ubuntu 14.04 中删除 TeXLive 2016

我通过 PPA 安装了 TeXLive 2016 并使用了以下命令-

sudo add-apt-repository ppa:jonathonf/texlive
sudo apt update
sudo apt install texlive-full

由于某些原因，我试图删除它，但我不能。后来，我从官方网站上安装了 TeXLive，通过这个链接安装 TeX Live over the Internet。我使用了以下命令-

ravi@home:~/Downloads/install-tl-20180527$ sudo ./install-tl

现在，我可以在 Ubuntu 14.04 LTS 上使用 TeXLive 2018 了Texmaker 4.1 (compiled with Qt 4.8.4 and Poppler 0.24.3)。但是，我的 Ubuntu 显示以下错误-

看来 TeXLive2016 是罪魁祸首。我用过sudo apt-get purge texlive*，但没有用。请看下文——

The following packages have unmet dependencies:
 asymptote : Depends: texlive-latex-base but it is not going to be installed
             Depends: texlive-base-bin
             Depends: texlive-pstricks but it is not going to be installed
 dvipng : Depends: texlive-base-bin
 feynmf : Depends: texlive-latex-base but it is not going to be installed
          Depends: texlive-font-utils but it is not going to be installed
          Depends: texlive-extra-utils but it is not going to be installed
 fragmaster : Depends: texlive-base-bin
              Depends: texlive-latex-base but it is not going to be installed
              Depends: texlive-latex-recommended but it is not going to be installed
              Depends: texlive-extra-utils but it is not going to be installed
              Depends: texlive-font-utils but it is not going to be installed
 latex-beamer : Depends: texlive-latex-base but it is not going to be installed
 latex-xcolor : Depends: texlive-latex-recommended but it is not going to be installed
 latexmk : Depends: texlive-latex-base but it is not going to be installed
 pgf : Depends: texlive-latex-recommended but it is not going to be installed
 prosper : Depends: texlive-latex-base but it is not going to be installed
           Depends: texlive-pstricks but it is not going to be installed
           Depends: texlive-latex-recommended but it is not going to be installed
 purifyeps : Depends: texlive-metapost but it is not going to be installed
 tex4ht-common : Depends: texlive-base-bin
                 Recommends: tex4ht but it is not going to be installed
 tipa : Depends: texlive-latex-base but it is not going to be installed
        Depends: texlive-base-bin
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

也试过sudo apt-get autoremove和sudo apt-get -f install。请看下面-

ravi@home:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  luatex texlive-binaries texlive-extra-utils texlive-font-utils
  texlive-fonts-recommended texlive-fonts-recommended-doc
  texlive-generic-recommended texlive-latex-base
The following packages will be REMOVED:
  context
The following NEW packages will be installed:
  luatex texlive-binaries texlive-extra-utils texlive-font-utils
  texlive-fonts-recommended texlive-fonts-recommended-doc
  texlive-generic-recommended texlive-latex-base
0 upgraded, 8 newly installed, 1 to remove and 264 not upgraded.
1 not fully installed or removed.
Need to get 0 B/30.2 MB of archives.
After this operation, 9,608 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 295461 files and directories currently installed.)
Removing context (2016.05.17.20160523-1~ubuntu14.04.1york0) ...
unknown option: format
dpkg: error processing package context (--remove):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 context
E: Sub-process /usr/bin/dpkg returned an error code (1)

请问有什么办法可以解决吗？