sudo apt-get install avogadro Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: avogadro-utils libavogadro2-1 libqt5concurrent5 libsymspg1 The following NEW packages will be installed: avogadro avogadro-utils libavogadro2-1 libqt5concurrent5 libsymspg1 0 upgraded, 5 newly installed, 0 to remove and 61 not upgraded. Need to get 88.3 kB/27.4 MB of archives. After this operation, 225 MB of additional disk space will be used. Do you want to continue? [Y/n] Y Get:1 http://in.archive.ubuntu.com/ubuntu focal/universe amd64 avogadro-utils amd64 1.93.0-3 [88.3 kB] Fetched 88.3 kB in 7s (13.1 kB/s) Selecting previously unselected package libqt5concurrent5:amd64. dpkg: warning: files list file for package 'ucsf-chimerax' missing; assuming package has no files currently installed (Reading database ... 299329 files and directories currently installed.) Preparing to unpack .../libqt5concurrent5_5.12.8+dfsg-0ubuntu2.1_amd64.deb ... Unpacking libqt5concurrent5:amd64 (5.12.8+dfsg-0ubuntu2.1) ... Selecting previously unselected package libsymspg1:amd64. Preparing to unpack .../libsymspg1_1.14.1-5build2_amd64.deb ... Unpacking libsymspg1:amd64 (1.14.1-5build2) ... Selecting previously unselected package libavogadro2-1:amd64. Preparing to unpack .../libavogadro2-1_1.93.0-3_amd64.deb ... Unpacking libavogadro2-1:amd64 (1.93.0-3) ... Selecting previously unselected package avogadro. Preparing to unpack .../avogadro_1.93.0-1_amd64.deb ... Unpacking avogadro (1.93.0-1) ... Selecting previously unselected package avogadro-utils. Preparing to unpack .../avogadro-utils_1.93.0-3_amd64.deb ... Unpacking avogadro-utils (1.93.0-3) ... Setting up libsymspg1:amd64 (1.14.1-5build2) ... Setting up libqt5concurrent5:amd64 (5.12.8+dfsg-0ubuntu2.1) ... Setting up libavogadro2-1:amd64 (1.93.0-3) ... Setting up avogadro (1.93.0-1) ... Setting up avogadro-utils (1.93.0-3) ... Processing triggers for mime-support (3.64ubuntu1) ... Processing triggers for gnome-menus (3.36.0-1ubuntu1) ... Processing triggers for libc-bin (2.31-0ubuntu9.9) ... Processing triggers for desktop-file-utils (0.24-1ubuntu3) ... sudo apt-get install openbabel Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libopenbabel6 libschroedinger-maeparser1 The following NEW packages will be installed: libopenbabel6 libschroedinger-maeparser1 openbabel 0 upgraded, 3 newly installed, 0 to remove and 61 not upgraded. Need to get 3,784 kB of archives. After this operation, 17.9 MB of additional disk space will be used. Do you want to continue? [Y/n] Y Get:1 http://in.archive.ubuntu.com/ubuntu focal/universe amd64 libschroedinger-maeparser1 amd64 1.2.2-1build1 [89.1 kB] Get:2 http://in.archive.ubuntu.com/ubuntu focal/universe amd64 libopenbabel6 amd64 3.0.0+dfsg-3ubuntu3 [3,568 kB] Get:3 http://in.archive.ubuntu.com/ubuntu focal/universe amd64 openbabel amd64 3.0.0+dfsg-3ubuntu3 [127 kB] Fetched 3,784 kB in 18s (213 kB/s) Selecting previously unselected package libschroedinger-maeparser1:amd64. dpkg: warning: files list file for package 'ucsf-chimerax' missing; assuming package has no files currently installed (Reading database ... 299560 files and directories currently installed.) Preparing to unpack .../libschroedinger-maeparser1_1.2.2-1build1_amd64.deb ... Unpacking libschroedinger-maeparser1:amd64 (1.2.2-1build1) ... Selecting previously unselected package libopenbabel6. Preparing to unpack .../libopenbabel6_3.0.0+dfsg-3ubuntu3_amd64.deb ... Unpacking libopenbabel6 (3.0.0+dfsg-3ubuntu3) ... Selecting previously unselected package openbabel. Preparing to unpack .../openbabel_3.0.0+dfsg-3ubuntu3_amd64.deb ... Unpacking openbabel (3.0.0+dfsg-3ubuntu3) ... Setting up libschroedinger-maeparser1:amd64 (1.2.2-1build1) ... Setting up libopenbabel6 (3.0.0+dfsg-3ubuntu3) ... Setting up openbabel (3.0.0+dfsg-3ubuntu3) ... Processing triggers for libc-bin (2.31-0ubuntu9.9) ... Processing triggers for man-db (2.9.1-1) ...