(Update)
I got answer with this link instruction ( https://linuxhint.com/install-qgis3-geospatial-ubuntu/ ) . This link also have one problem is "gdal-data" . I check to software & update and open tab of (other software) , click to (Canonical Partners). Update again and installation ok.
Installed QGIS Desktop app from here (https://qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu ) . Error have. May be python version problem.
ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: python-qgis (not installed)
ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
Uname: Linux 4.15.0-24-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Sat Sep 1 23:00:48 2018
ErrorMessage: dpkg-deb --fsys-tarfile subprocess returned error exit status 2
InstallationDate: Installed on 2018-05-27 (97 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
dpkg 1.19.0.5ubuntu2
apt 1.6.3ubuntu0.1
SourcePackage: qgis
Title: package python-qgis (not installed) failed to install/upgrade: dpkg-deb --fsys-tarfile subprocess returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that there was an error on your system when trying to install a particular package. Please execute the following command, as it will clear your package cache, in a terminal:
sudo apt-get clean
Then try performing the update again. This will likely resolve your issue, but the failure could be caused by filesystem or memory corruption. So please also run a fsck on your filesystem(s) and a memory test. Thanks in advance!
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