install libdvd-pkg

 $ sudo apt install libdvd-pkg
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-5.11.0-38-generic linux-hwe-5.11-headers-5.11.0-38
  linux-image-5.11.0-38-generic linux-modules-5.11.0-38-generic
  linux-modules-extra-5.11.0-38-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  autoconf automake autopoint autotools-dev debhelper dh-autoreconf
  dh-strip-nondeterminism dwz gettext intltool-debian libarchive-cpio-perl
  libarchive-zip-perl libcroco3 libdebhelper-perl
  libfile-stripnondeterminism-perl libltdl-dev libmail-sendmail-perl
  libsub-override-perl libsys-hostname-long-perl libtool m4 po-debconf
Suggested packages:
  autoconf-archive gnu-standards autoconf-doc dh-make gettext-doc
  libasprintf-dev libgettextpo-dev libtool-doc gfortran | fortran95-compiler
  gcj-jdk m4-doc libmail-box-perl
The following NEW packages will be installed:
  autoconf automake autopoint autotools-dev debhelper dh-autoreconf
  dh-strip-nondeterminism dwz gettext intltool-debian libarchive-cpio-perl
  libarchive-zip-perl libcroco3 libdebhelper-perl libdvd-pkg
  libfile-stripnondeterminism-perl libltdl-dev libmail-sendmail-perl
  libsub-override-perl libsys-hostname-long-perl libtool m4 po-debconf
0 upgraded, 23 newly installed, 0 to remove and 32 not upgraded.
Need to get 4.339 kB of archives.
After this operation, 14,5 MB 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 m4 amd64 1.4.18-4 [199 kB]
Get:2 http://id.archive.ubuntu.com/ubuntu focal/main amd64 autoconf all 2.69-11.1 [321 kB]
Get:3 http://id.archive.ubuntu.com/ubuntu focal/main amd64 autotools-dev all 20180224.1 [39,6 kB]
Get:4 http://id.archive.ubuntu.com/ubuntu focal/main amd64 automake all 1:1.16.1-4ubuntu6 [522 kB]
Get:5 http://id.archive.ubuntu.com/ubuntu focal/main amd64 autopoint all 0.19.8.1-10build1 [412 kB]
Get:6 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libtool all 2.4.6-14 [161 kB]
Get:7 http://id.archive.ubuntu.com/ubuntu focal/main amd64 dh-autoreconf all 19 [16,1 kB]
Get:8 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libdebhelper-perl all 12.10ubuntu1 [62,1 kB]
Get:9 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libarchive-zip-perl all 1.67-2 [90,5 kB]
Get:10 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libsub-override-perl all 0.09-2 [9.532 B]
Get:11 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libfile-stripnondeterminism-perl all 1.7.0-1 [15,9 kB]
Get:12 http://id.archive.ubuntu.com/ubuntu focal/main amd64 dh-strip-nondeterminism all 1.7.0-1 [5.228 B]
Get:13 http://id.archive.ubuntu.com/ubuntu focal/main amd64 dwz amd64 0.13-5 [151 kB]
Get:14 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libcroco3 amd64 0.6.13-1 [82,5 kB]
Get:15 http://id.archive.ubuntu.com/ubuntu focal/main amd64 gettext amd64 0.19.8.1-10build1 [895 kB]
Get:16 http://id.archive.ubuntu.com/ubuntu focal/main amd64 intltool-debian all 0.35.0+20060710.5 [24,9 kB]
Get:17 http://id.archive.ubuntu.com/ubuntu focal/main amd64 po-debconf all 1.0.21 [233 kB]
Get:18 http://id.archive.ubuntu.com/ubuntu focal/main amd64 debhelper all 12.10ubuntu1 [877 kB]
Get:19 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libarchive-cpio-perl all 0.10-1 [9.644 B]
Get:20 http://id.archive.ubuntu.com/ubuntu focal/multiverse amd64 libdvd-pkg all 1.4.2-1-1 [14,9 kB]
Get:21 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libltdl-dev amd64 2.4.6-14 [162 kB]
Get:22 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libsys-hostname-long-perl all 1.5-1 [11,7 kB]
Get:23 http://id.archive.ubuntu.com/ubuntu focal/main amd64 libmail-sendmail-perl all 0.80-1 [22,6 kB]
Fetched 4.339 kB in 3s (1.458 kB/s)               
Preconfiguring packages ...
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(Reading database ... 338940 files and directories currently installed.)
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Setting up libdebhelper-perl (12.10ubuntu1) ...
Setting up m4 (1.4.18-4) ...
Setting up autotools-dev (20180224.1) ...
Setting up autopoint (0.19.8.1-10build1) ...
Setting up libcroco3:amd64 (0.6.13-1) ...
Setting up autoconf (2.69-11.1) ...
Setting up dwz (0.13-5) ...
Setting up libarchive-cpio-perl (0.10-1) ...
Setting up libsub-override-perl (0.09-2) ...
Setting up libsys-hostname-long-perl (1.5-1) ...
Setting up automake (1:1.16.1-4ubuntu6) ...
update-alternatives: using /usr/bin/automake-1.16 to provide /usr/bin/automake
(automake) in auto mode
Setting up libfile-stripnondeterminism-perl (1.7.0-1) ...
Setting up gettext (0.19.8.1-10build1) ...
Setting up libtool (2.4.6-14) ...
Setting up intltool-debian (0.35.0+20060710.5) ...
Setting up libmail-sendmail-perl (0.80-1) ...
Setting up libltdl-dev:amd64 (2.4.6-14) ...
Setting up dh-strip-nondeterminism (1.7.0-1) ...
Setting up po-debconf (1.0.21) ...
Setting up dh-autoreconf (19) ...
Setting up debhelper (12.10ubuntu1) ...
Setting up libdvd-pkg (1.4.2-1-1) ...
libdvd-pkg: dpkg database is locked. You may need to use command "sudo dpkg-rec
onfigure libdvd-pkg".
libdvd-pkg: Building and installation of package(s) [libdvdcss2 libdvdcss-dev]
postponed till after next APT operation.
Processing triggers for install-info (6.7.0.dfsg.2-5) ...
Processing triggers for libc-bin (2.31-0ubuntu9.2) ...
Processing triggers for man-db (2.9.1-1) ...