I was looking for a UX design tool on Linux, so tried to install Pencil .
dpkg -i Pencil_3.0.4_amd64.deb
Selecting previously unselected package pencil.
(Reading database ... 291107 files and directories currently installed.)
Preparing to unpack Pencil_3.0.4_amd64.deb ...
Unpacking pencil (3.0.4-49) ...
Setting up pencil (3.0.4-49) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
I don't see any error, or it appear anywhere on the programs. It does not appear on the installed software either.
dpkg -L pencil
/.
/opt
/opt/Pencil
/opt/Pencil/content_resources_200_percent.pak
/opt/Pencil/pencil
/opt/Pencil/views_resources_200_percent.pak
/opt/Pencil/icudtl.dat
/opt/Pencil/LICENSE.electron.txt
/opt/Pencil/blink_image_resources_200_percent.pak
/opt/Pencil/locales
/opt/Pencil/locales/sl.pak
/opt/Pencil/locales/cs.pak
/opt/Pencil/locales/fa.pak
/opt/Pencil/locales/ta.pak
/opt/Pencil/locales/gu.pak
/opt/Pencil/locales/nl.pak
/opt/Pencil/locales/id.pak
/opt/Pencil/locales/et.pak
/opt/Pencil/locales/ar.pak
/opt/Pencil/locales/am.pak
/opt/Pencil/locales/da.pak
/opt/Pencil/locales/fi.pak
/opt/Pencil/locales/lt.pak
/opt/Pencil/locales/en-GB.pak
/opt/Pencil/locales/it.pak
/opt/Pencil/locales/nb.pak
/opt/Pencil/locales/th.pak
/opt/Pencil/locales/sk.pak
/opt/Pencil/locales/ro.pak
/opt/Pencil/locales/hu.pak
/opt/Pencil/locales/sr.pak
/opt/Pencil/locales/mr.pak
/opt/Pencil/locales/fake-bidi.pak
/opt/Pencil/locales/zh-CN.pak
/opt/Pencil/locales/ko.pak
/opt/Pencil/locales/kn.pak
/opt/Pencil/locales/pl.pak
/opt/Pencil/locales/es.pak
/opt/Pencil/locales/ca.pak
/opt/Pencil/locales/vi.pak
/opt/Pencil/locales/he.pak
/opt/Pencil/locales/te.pak
/opt/Pencil/locales/pt-BR.pak
/opt/Pencil/locales/bn.pak
/opt/Pencil/locales/es-419.pak
/opt/Pencil/locales/en-US.pak
/opt/Pencil/locales/uk.pak
/opt/Pencil/locales/ml.pak
/opt/Pencil/locales/hr.pak
/opt/Pencil/locales/lv.pak
/opt/Pencil/locales/el.pak
/opt/Pencil/locales/ru.pak
/opt/Pencil/locales/hi.pak
/opt/Pencil/locales/de.pak
/opt/Pencil/locales/pt-PT.pak
/opt/Pencil/locales/ja.pak
/opt/Pencil/locales/ms.pak
/opt/Pencil/locales/sv.pak
/opt/Pencil/locales/fil.pak
/opt/Pencil/locales/zh-TW.pak
/opt/Pencil/locales/tr.pak
/opt/Pencil/locales/bg.pak
/opt/Pencil/locales/sw.pak
/opt/Pencil/locales/fr.pak
/opt/Pencil/snapshot_blob.bin
/opt/Pencil/libffmpeg.so
/opt/Pencil/resources
/opt/Pencil/resources/app.asar
/opt/Pencil/resources/app.asar.unpacked
/opt/Pencil/resources/app.asar.unpacked/node_modules
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/Typings
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/Typings/xelement.d.ts
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/LICENSE
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/package.json
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/xelement.sln
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/.vs
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/.vs/xelement
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/.vs/xelement/v14
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/.vs/xelement/v14/.suo
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/sampledata.xml
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/.npmignore
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/Index.js
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/lib
/opt/Pencil/resources/app.asar.unpacked/node_modules/xelement/lib/xelement.js
/opt/Pencil/resources/electron.asar
/opt/Pencil/content_shell.pak
/opt/Pencil/natives_blob.bin
/opt/Pencil/ui_resources_200_percent.pak
/opt/Pencil/libnode.so
/opt/Pencil/LICENSES.chromium.html
/usr
/usr/share
/usr/share/applications
/usr/share/applications/pencil.desktop
/usr/share/doc
/usr/share/doc/pencil
/usr/share/doc/pencil/changelog.gz
/usr/share/icons
/usr/share/icons/hicolor
/usr/share/icons/hicolor/48x48
/usr/share/icons/hicolor/48x48/apps
/usr/share/icons/hicolor/48x48/apps/pencil.png
/usr/share/icons/hicolor/32x32
/usr/share/icons/hicolor/32x32/apps
/usr/share/icons/hicolor/32x32/apps/pencil.png
/usr/share/icons/hicolor/64x64
/usr/share/icons/hicolor/64x64/apps
/usr/share/icons/hicolor/64x64/apps/pencil.png
/usr/share/icons/hicolor/24x24
/usr/share/icons/hicolor/24x24/apps
/usr/share/icons/hicolor/24x24/apps/pencil.png
/usr/share/icons/hicolor/16x16
/usr/share/icons/hicolor/16x16/apps
/usr/share/icons/hicolor/16x16/apps/pencil.png
/usr/share/icons/hicolor/96x96
/usr/share/icons/hicolor/96x96/apps
/usr/share/icons/hicolor/96x96/apps/pencil.png
/usr/share/icons/hicolor/128x128
/usr/share/icons/hicolor/128x128/apps
/usr/share/icons/hicolor/128x128/apps/pencil.png
/usr/share/icons/hicolor/256x256
/usr/share/icons/hicolor/256x256/apps
/usr/share/icons/hicolor/256x256/apps/pencil.png
What could be wrong here and how to fix it?
Dpkg installer doesn't handle packages as effectively as apt package manager. So open terminal and type
sudo apt install pencil
If you have downloaded the .deb file, open terminalcd /your_download_directory
and typesudo apt-get install ./pencil_3.1.0.ga_amd64.deb
(according to your downloaded version)