package emacs24-el (not installed) failed to install/upgrade: unable to open '/usr/share/emacs/24.5/lisp/textmodes/bibtex.el.gz.dpkg-new': Operation not permitted

[Tina Taylor]

I have no idea what I'm doing in Ubuntu. I have been following online guides to tweak. I think I added unsafe update repositories. I have since deleted the sources.list and used the Software Updater settings to create a new one. I have been trying to install git gui, but running into problems.

Ubuntu 16.04 LTS
~$ apt-cache policy pkgname
N: Unable to locate package pkgname

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: emacs24-el (not installed)
ProcVersionSignature: Ubuntu 4.13.0-26.29~16.04.2-generic 4.13.13
Uname: Linux 4.13.0-26-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Thu Jan 18 23:25:46 2018
DuplicateSignature:
 package:emacs24-el:(not installed)
 Unpacking emacs24-common (24.5+1-6ubuntu1) ...
 dpkg: error processing archive /var/cache/apt/archives/emacs24-common_24.5+1-6ubuntu1_all.deb (--unpack):
  unable to open '/usr/share/emacs/24.5/lisp/leim/quail/lao.elc.dpkg-new': Operation not permitted
ErrorMessage: unable to open '/usr/share/emacs/24.5/lisp/textmodes/bibtex.el.gz.dpkg-new': Operation not permitted
InstallationDate: Installed on 2018-01-08 (11 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.24
SourcePackage: emacs24
Title: package emacs24-el (not installed) failed to install/upgrade: unable to open '/usr/share/emacs/24.5/lisp/textmodes/bibtex.el.gz.dpkg-new': Operation not permitted
UpgradeStatus: No upgrade log present (probably fresh install)