Following your answer from another thread:
sudo apt-get purge root-system* root-plugin* libroot*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'root-system-bin' for glob 'root-system*'
Note, selecting 'root-system-doc' for glob 'root-system*'
Note, selecting 'root-system' for glob 'root-system*'
Note, selecting 'root-system-rootd' for glob 'root-system*'
Note, selecting 'root-system-proofd' for glob 'root-system*'
Note, selecting 'root-system-common' for glob 'root-system*'
Package 'root-system' is not installed, so not removed
Package 'root-system-bin' is not installed, so not removed
Package 'root-system-common' is not installed, so not removed
Package 'root-system-doc' is not installed, so not removed
Package 'root-system-proofd' is not installed, so not removed
Package 'root-system-rootd' is not installed, so not removed
Note, selecting 'root-plugin-io-sql' for glob 'root-plugin*'
Note, selecting 'root-plugin-hist-histpainter' for glob 'root-plugin*'
Note, selecting 'root-plugin-io-xml' for glob 'root-plugin*'
Note, selecting 'root-plugin-sql-pgsql' for glob 'root-plugin*'
Note, selecting 'root-plugin-math-fftw3' for glob 'root-plugin*'
Note, selecting 'root-plugin-tree-treeviewer' for glob 'root-plugin*'
Note, selecting 'root-plugin-gui-fitpanel' for glob 'root-plugin*'
Note, selecting 'root-plugin-gui-qt' for glob 'root-plugin*'
Note, selecting 'root-plugin-proof-peac' for glob 'root-plugin*'
Note, selecting 'root-plugin-net-globus' for glob 'root-plugin*'
Note, selecting 'root-plugin-math-fumili' for glob 'root-plugin*'
Note, selecting 'root-plugin-hist-hbook' for glob 'root-plugin*'
Note, selecting 'root-plugin-geom-geompainter' for glob 'root-plugin*'
Note, selecting 'root-plugin-sql-mysql' for glob 'root-plugin*'
Note, selecting 'root-plugin-hist-spectrumpainter' for glob 'root-plugin*'
Note, selecting 'root-plugin-geom-gdml' for glob 'root-plugin*'
Note, selecting 'root-plugin-math-minuit2' for glob 'root-plugin*'
Note, selecting 'root-plugin-graf2d-qt' for glob 'root-plugin*'
Note, selecting 'root-plugin-graf3d-x3d' for glob 'root-plugin*'
Note, selecting 'root-plugin-geom-geombuilder' for glob 'root-plugin*'
Note, selecting 'root-plugin-graf2d-x11' for glob 'root-plugin*'
Note, selecting 'root-plugin-graf2d-asimage' for glob 'root-plugin*'
Note, selecting 'root-plugin-sql-odbc' for glob 'root-plugin*'
Note, selecting 'root-plugin-net-krb5' for glob 'root-plugin*'
Note, selecting 'root-plugin-montecarlo-pythia8' for glob 'root-plugin*'
Note, selecting 'root-plugin-gui-guibuilder' for glob 'root-plugin*'
Note, selecting 'root-plugin-gui-sessionviewer' for glob 'root-plugin*'
Package 'root-plugin-geom-gdml' is not installed, so not removed
Package 'root-plugin-geom-geombuilder' is not installed, so not removed
Package 'root-plugin-geom-geompainter' is not installed, so not removed
Package 'root-plugin-graf2d-asimage' is not installed, so not removed
Package 'root-plugin-graf2d-qt' is not installed, so not removed
Package 'root-plugin-graf2d-x11' is not installed, so not removed
Package 'root-plugin-graf3d-x3d' is not installed, so not removed
Package 'root-plugin-gui-fitpanel' is not installed, so not removed
Package 'root-plugin-gui-guibuilder' is not installed, so not removed
Package 'root-plugin-gui-qt' is not installed, so not removed
Package 'root-plugin-gui-sessionviewer' is not installed, so not removed
Package 'root-plugin-hist-hbook' is not installed, so not removed
Package 'root-plugin-hist-histpainter' is not installed, so not removed
Package 'root-plugin-hist-spectrumpainter' is not installed, so not removed
Package 'root-plugin-io-sql' is not installed, so not removed
Package 'root-plugin-io-xml' is not installed, so not removed
Package 'root-plugin-math-fftw3' is not installed, so not removed
Package 'root-plugin-math-fumili' is not installed, so not removed
Package 'root-plugin-math-minuit2' is not installed, so not removed
Package 'root-plugin-montecarlo-pythia8' is not installed, so not removed
Package 'root-plugin-net-globus' is not installed, so not removed
Package 'root-plugin-net-krb5' is not installed, so not removed
Package 'root-plugin-proof-peac' is not installed, so not removed
Package 'root-plugin-sql-mysql' is not installed, so not removed
Package 'root-plugin-sql-odbc' is not installed, so not removed
Package 'root-plugin-sql-pgsql' is not installed, so not removed
Package 'root-plugin-tree-treeviewer' is not installed, so not removed
Note, selecting 'libroot-html-dev' for glob 'libroot*'
Note, selecting 'libroot-bindings-python5.34' for glob 'libroot*'
Note, selecting 'libroot-montecarlo-vmc-dev' for glob 'libroot*'
Note, selecting 'libroot-io-dev' for glob 'libroot*'
Note, selecting 'libroot-misc-memstat5.34' for glob 'libroot*'
Note, selecting 'libroot-core5.34' for glob 'libroot*'
Note, selecting 'libroot-misc-table-dev' for glob 'libroot*'
Note, selecting 'libroot-math-genvector5.34' for glob 'libroot*'
Note, selecting 'libroot-graf3d-eve5.34' for glob 'libroot*'
Note, selecting 'libroot-math-physics-dev' for glob 'libroot*'
Note, selecting 'libroot-net-ldap5.34' for glob 'libroot*'
Note, selecting 'libroot-math-matrix-dev' for glob 'libroot*'
Note, selecting 'libroot-graf2d-gpad-dev' for glob 'libroot*'
Note, selecting 'libroot-gui-dev' for glob 'libroot*'
Note, selecting 'libroot-misc-minicern-dev' for glob 'libroot*'
Note, selecting 'libroot-proof-proofplayer5.34' for glob 'libroot*'
Note, selecting 'libroot-tmva-dev' for glob 'libroot*'
Note, selecting 'libroot-math-unuran-dev' for glob 'libroot*'
Note, selecting 'libroot-math-mathcore-dev' for glob 'libroot*'
Note, selecting 'libroot-graf2d-postscript-dev' for glob 'libroot*'
Note, selecting 'libroot-graf3d-g3d-dev' for glob 'libroot*'
Note, selecting 'libroot-montecarlo-eg-dev' for glob 'libroot*'
Note, selecting 'libroot-math-smatrix-dev' for glob 'libroot*'
Note, selecting 'libroot-math-quadp-dev' for glob 'libroot*'
Note, selecting 'libroot-roofit5.34' for glob 'libroot*'
Note, selecting 'libroot-hist-spectrum5.34' for glob 'libroot*'
Note, selecting 'libroot-math-mathmore5.34' for glob 'libroot*'
Note, selecting 'libroot-tree-dev' for glob 'libroot*'
Note, selecting 'libroot-proof-clarens-dev' for glob 'libroot*'
Note, selecting 'libroot-math-foam-dev' for glob 'libroot*'
Note, selecting 'libroot-graf3d-gl-dev' for glob 'libroot*'
Note, selecting 'libroot-math-splot-dev' for glob 'libroot*'
Note, selecting 'libroot-io-xmlparser-dev' for glob 'libroot*'
Note, selecting 'libroot-net-auth5.34' for glob 'libroot*'
Note, selecting 'libroot-math-minuit5.34' for glob 'libroot*'
Note, selecting 'libroot-geom-dev' for glob 'libroot*'
Note, selecting 'libroot-gui-ged-dev' for glob 'libroot*'
Note, selecting 'libroot-bindings-ruby5.34' for glob 'libroot*'
Note, selecting 'libroot-proof5.34' for glob 'libroot*'
Note, selecting 'libroot-hist-dev' for glob 'libroot*'
Note, selecting 'libroot-net-bonjour5.34' for glob 'libroot*'
Note, selecting 'libroot-net5.34' for glob 'libroot*'
Note, selecting 'libroot-math-mlp5.34' for glob 'libroot*'
Note, selecting 'libroot-tree-treeplayer5.34' for glob 'libroot*'
Note, selecting 'libroot-graf2d-graf-dev' for glob 'libroot*'
Note, selecting 'libroot-html5.34' for glob 'libroot*'
Note, selecting 'libroot-montecarlo-vmc5.34' for glob 'libroot*'
Note, selecting 'libroot-bindings-python-dev' for glob 'libroot*'
Note, selecting 'libroot-io5.34' for glob 'libroot*'
Note, selecting 'libroot-misc-memstat-dev' for glob 'libroot*'
Note, selecting 'libroot-core-dev' for glob 'libroot*'
Note, selecting 'libroot-misc-table5.34' for glob 'libroot*'
Note, selecting 'libroot-math-genvector-dev' for glob 'libroot*'
Note, selecting 'libroot-graf3d-eve-dev' for glob 'libroot*'
Note, selecting 'libroot-math-physics5.34' for glob 'libroot*'
Note, selecting 'libroot-math-matrix5.34' for glob 'libroot*'
Note, selecting 'libroot-graf2d-gpad5.34' for glob 'libroot*'
Note, selecting 'libroot-net-ldap-dev' for glob 'libroot*'
Note, selecting 'libroot-gui5.34' for glob 'libroot*'
Note, selecting 'libroot-misc-minicern5.34' for glob 'libroot*'
Note, selecting 'libroot-tmva5.34' for glob 'libroot*'
Note, selecting 'libroot-proof-proofplayer-dev' for glob 'libroot*'
Note, selecting 'libroot-math-unuran5.34' for glob 'libroot*'
Note, selecting 'libroot-math-mathcore5.34' for glob 'libroot*'
Note, selecting 'libroot-graf2d-postscript5.34' for glob 'libroot*'
Note, selecting 'libroot-graf3d-g3d5.34' for glob 'libroot*'
Note, selecting 'libroot-montecarlo-eg5.34' for glob 'libroot*'
Note, selecting 'libroot-math-smatrix5.34' for glob 'libroot*'
Note, selecting 'libroot-math-quadp5.34' for glob 'libroot*'
Note, selecting 'libroot-roofit-dev' for glob 'libroot*'
Note, selecting 'libroot-hist-spectrum-dev' for glob 'libroot*'
Note, selecting 'libroot-tree5.34' for glob 'libroot*'
Note, selecting 'libroot-math-mathmore-dev' for glob 'libroot*'
Note, selecting 'libroot-proof-clarens5.34' for glob 'libroot*'
Note, selecting 'libroot-math-foam5.34' for glob 'libroot*'
Note, selecting 'libroot-graf3d-gl5.34' for glob 'libroot*'
Note, selecting 'libroot-math-splot5.34' for glob 'libroot*'
Note, selecting 'libroot-io-xmlparser5.34' for glob 'libroot*'
Note, selecting 'libroot-net-auth-dev' for glob 'libroot*'
Note, selecting 'libroot-math-minuit-dev' for glob 'libroot*'
Note, selecting 'libroot-geom5.34' for glob 'libroot*'
Note, selecting 'libroot-gui-ged5.34' for glob 'libroot*'
Note, selecting 'libroot-hist5.34' for glob 'libroot*'
Note, selecting 'libroot-bindings-ruby-dev' for glob 'libroot*'
Note, selecting 'libroot-proof-dev' for glob 'libroot*'
Note, selecting 'libroot-static' for glob 'libroot*'
Note, selecting 'libroot-net-bonjour-dev' for glob 'libroot*'
Note, selecting 'libroot-net-dev' for glob 'libroot*'
Note, selecting 'libroot-graf2d-graf5.34' for glob 'libroot*'
Note, selecting 'libroot-math-mlp-dev' for glob 'libroot*'
Note, selecting 'libroot-tree-treeplayer-dev' for glob 'libroot*'
Package 'libroot-core-dev' is not installed, so not removed
Package 'libroot-bindings-python5.34' is not installed, so not removed
Package 'libroot-bindings-ruby5.34' is not installed, so not removed
Package 'libroot-core5.34' is not installed, so not removed
Package 'libroot-geom5.34' is not installed, so not removed
Package 'libroot-graf2d-gpad5.34' is not installed, so not removed
Package 'libroot-graf2d-graf5.34' is not installed, so not removed
Package 'libroot-graf2d-postscript5.34' is not installed, so not removed
Package 'libroot-graf3d-eve5.34' is not installed, so not removed
Package 'libroot-graf3d-g3d5.34' is not installed, so not removed
Package 'libroot-graf3d-gl5.34' is not installed, so not removed
Package 'libroot-gui-ged5.34' is not installed, so not removed
Package 'libroot-gui5.34' is not installed, so not removed
Package 'libroot-hist-spectrum5.34' is not installed, so not removed
Package 'libroot-hist5.34' is not installed, so not removed
Package 'libroot-html5.34' is not installed, so not removed
Package 'libroot-io-xmlparser5.34' is not installed, so not removed
Package 'libroot-io5.34' is not installed, so not removed
Package 'libroot-math-foam5.34' is not installed, so not removed
Package 'libroot-math-genvector5.34' is not installed, so not removed
Package 'libroot-math-mathcore5.34' is not installed, so not removed
Package 'libroot-math-mathmore5.34' is not installed, so not removed
Package 'libroot-math-matrix5.34' is not installed, so not removed
Package 'libroot-math-minuit5.34' is not installed, so not removed
Package 'libroot-math-mlp5.34' is not installed, so not removed
Package 'libroot-math-physics5.34' is not installed, so not removed
Package 'libroot-math-quadp5.34' is not installed, so not removed
Package 'libroot-math-smatrix5.34' is not installed, so not removed
Package 'libroot-math-splot5.34' is not installed, so not removed
Package 'libroot-math-unuran5.34' is not installed, so not removed
Package 'libroot-misc-memstat5.34' is not installed, so not removed
Package 'libroot-misc-minicern5.34' is not installed, so not removed
Package 'libroot-misc-table5.34' is not installed, so not removed
Package 'libroot-montecarlo-eg5.34' is not installed, so not removed
Package 'libroot-montecarlo-vmc5.34' is not installed, so not removed
Package 'libroot-net-auth5.34' is not installed, so not removed
Package 'libroot-net-bonjour5.34' is not installed, so not removed
Package 'libroot-net-ldap5.34' is not installed, so not removed
Package 'libroot-net5.34' is not installed, so not removed
Package 'libroot-proof-clarens5.34' is not installed, so not removed
Package 'libroot-proof-proofplayer5.34' is not installed, so not removed
Package 'libroot-proof5.34' is not installed, so not removed
Package 'libroot-roofit5.34' is not installed, so not removed
Package 'libroot-tmva5.34' is not installed, so not removed
Package 'libroot-tree-treeplayer5.34' is not installed, so not removed
Package 'libroot-tree5.34' is not installed, so not removed
Package 'libroot-bindings-python-dev' is not installed, so not removed
Package 'libroot-bindings-ruby-dev' is not installed, so not removed
Package 'libroot-geom-dev' is not installed, so not removed
Package 'libroot-graf2d-gpad-dev' is not installed, so not removed
Package 'libroot-graf2d-graf-dev' is not installed, so not removed
Package 'libroot-graf2d-postscript-dev' is not installed, so not removed
Package 'libroot-graf3d-eve-dev' is not installed, so not removed
Package 'libroot-graf3d-g3d-dev' is not installed, so not removed
Package 'libroot-graf3d-gl-dev' is not installed, so not removed
Package 'libroot-gui-dev' is not installed, so not removed
Package 'libroot-gui-ged-dev' is not installed, so not removed
Package 'libroot-hist-dev' is not installed, so not removed
Package 'libroot-hist-spectrum-dev' is not installed, so not removed
Package 'libroot-html-dev' is not installed, so not removed
Package 'libroot-io-dev' is not installed, so not removed
Package 'libroot-io-xmlparser-dev' is not installed, so not removed
Package 'libroot-math-foam-dev' is not installed, so not removed
Package 'libroot-math-genvector-dev' is not installed, so not removed
Package 'libroot-math-mathcore-dev' is not installed, so not removed
Package 'libroot-math-mathmore-dev' is not installed, so not removed
Package 'libroot-math-matrix-dev' is not installed, so not removed
Package 'libroot-math-minuit-dev' is not installed, so not removed
Package 'libroot-math-mlp-dev' is not installed, so not removed
Package 'libroot-math-physics-dev' is not installed, so not removed
Package 'libroot-math-quadp-dev' is not installed, so not removed
Package 'libroot-math-smatrix-dev' is not installed, so not removed
Package 'libroot-math-splot-dev' is not installed, so not removed
Package 'libroot-math-unuran-dev' is not installed, so not removed
Package 'libroot-misc-memstat-dev' is not installed, so not removed
Package 'libroot-misc-minicern-dev' is not installed, so not removed
Package 'libroot-misc-table-dev' is not installed, so not removed
Package 'libroot-montecarlo-eg-dev' is not installed, so not removed
Package 'libroot-montecarlo-vmc-dev' is not installed, so not removed
Package 'libroot-net-auth-dev' is not installed, so not removed
Package 'libroot-net-bonjour-dev' is not installed, so not removed
Package 'libroot-net-dev' is not installed, so not removed
Package 'libroot-net-ldap-dev' is not installed, so not removed
Package 'libroot-proof-clarens-dev' is not installed, so not removed
Package 'libroot-proof-dev' is not installed, so not removed
Package 'libroot-proof-proofplayer-dev' is not installed, so not removed
Package 'libroot-roofit-dev' is not installed, so not removed
Package 'libroot-static' is not installed, so not removed
Package 'libroot-tmva-dev' is not installed, so not removed
Package 'libroot-tree-dev' is not installed, so not removed
Package 'libroot-tree-treeplayer-dev' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.