Install Plank Dock

 $ sudo apt install plank
[sudo] password for dhwan:
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  bamfdaemon libbamf3-2 libgnome-menu-3-0 libgtop-2.0-11 libgtop2-common
  libplank-common libplank1
Suggested packages:
  libplank-doc
The following NEW packages will be installed:
  bamfdaemon libbamf3-2 libgnome-menu-3-0 libgtop-2.0-11 libgtop2-common
  libplank-common libplank1 plank
0 upgraded, 8 newly installed, 0 to remove and 2 not upgraded.
Need to get 619 kB of archives.
After this operation, 2.657 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libgtop2-common all 2.40.0-2 [3.544 B]
Get:2 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libgtop-2.0-11 amd64 2.40.0-2 [36,1 kB]
Get:3 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libbamf3-2 amd64 0.5.3+18.04.20180207.2-0ubuntu2 [53,2 kB]
Get:4 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 bamfdaemon amd64 0.5.3+18.04.20180207.2-0ubuntu2 [88,2 kB]
Get:5 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libgnome-menu-3-0 amd64 3.36.0-1ubuntu1 [40,8 kB]
Get:6 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libplank-common all 0.11.89-1 [55,3 kB]
Get:7 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 libplank1 amd64 0.11.89-1 [247 kB]
Get:8 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 plank amd64 0.11.89-1 [94,7 kB]
Fetched 619 kB in 5s (123 kB/s)  
Selecting previously unselected package libgtop2-common.
(Reading database ... 444436 files and directories currently installed.)
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Unpacking libgtop2-common (2.40.0-2) ...
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Unpacking libbamf3-2:amd64 (0.5.3+18.04.20180207.2-0ubuntu2) ...
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Unpacking bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu2) ...
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Unpacking libgnome-menu-3-0:amd64 (3.36.0-1ubuntu1) ...
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Selecting previously unselected package plank.
Preparing to unpack .../7-plank_0.11.89-1_amd64.deb ...
Unpacking plank (0.11.89-1) ...
Setting up libbamf3-2:amd64 (0.5.3+18.04.20180207.2-0ubuntu2) ...
Setting up libgtop2-common (2.40.0-2) ...
Setting up libplank-common (0.11.89-1) ...
Setting up libgnome-menu-3-0:amd64 (3.36.0-1ubuntu1) ...
Setting up libgtop-2.0-11:amd64 (2.40.0-2) ...
Setting up bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu2) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for libglib2.0-0:amd64 (2.64.3-1~ubuntu20.04.1) ...
Processing triggers for libglib2.0-0:i386 (2.64.3-1~ubuntu20.04.1) ...
Processing triggers for libc-bin (2.31-0ubuntu9) ...
Setting up libplank1:amd64 (0.11.89-1) ...
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for desktop-file-utils (0.24-1ubuntu3) ...
Processing triggers for mime-support (3.64ubuntu1) ...
Setting up plank (0.11.89-1) ...
Processing triggers for libc-bin (2.31-0ubuntu9) ...