sudo apt install kitty

 $ sudo apt install kitty

Reading package lists... Done

Building dependency tree       

Reading state information... Done

The following additional packages will be installed:

  kitty-doc kitty-terminfo

The following NEW packages will be installed:

  kitty kitty-doc kitty-terminfo

0 upgraded, 3 newly installed, 0 to remove and 24 not upgraded.

Need to get 2.626 kB of archives.

After this operation, 9.624 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/universe amd64 kitty-terminfo all 0.15.0-1build1 [8.632 B]

Get:2 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 kitty amd64 0.15.0-1build1 [1.116 kB]

Get:3 http://id.archive.ubuntu.com/ubuntu focal/universe amd64 kitty-doc all 0.15.0-1build1 [1.501 kB]

Fetched 2.626 kB in 6s (474 kB/s)      

Selecting previously unselected package kitty-terminfo.

(Reading database ... 305975 files and directories currently installed.)

Preparing to unpack .../kitty-terminfo_0.15.0-1build1_all.deb ...

Unpacking kitty-terminfo (0.15.0-1build1) ...

Selecting previously unselected package kitty.

Preparing to unpack .../kitty_0.15.0-1build1_amd64.deb ...

Unpacking kitty (0.15.0-1build1) ...

Selecting previously unselected package kitty-doc.

Preparing to unpack .../kitty-doc_0.15.0-1build1_all.deb ...

Unpacking kitty-doc (0.15.0-1build1) ...

Setting up kitty-doc (0.15.0-1build1) ...

Setting up kitty-terminfo (0.15.0-1build1) ...

Setting up kitty (0.15.0-1build1) ...

Processing triggers for bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu2) ...

Rebuilding /usr/share/applications/bamf-2.index...

Processing triggers for desktop-file-utils (0.24-1ubuntu3) ...

Processing triggers for mime-support (3.64ubuntu1) ...

Processing triggers for hicolor-icon-theme (0.17-2) ...

Processing triggers for gnome-menus (3.36.0-1ubuntu1) ...

Processing triggers for man-db (2.9.1-1) ...