*** This bug is a duplicate of bug 1764858 *** https://bugs.launchpad.net/bugs/1764858
[SOLVED] I had similar problem as the bug report with similar outputs for requested commands. I got around by manually copying libzstd.so.1 libzstd.so.1.3.3 to libraries folder and it WORKED :) Steps involved: 1 . Download original .deb from http://mirrors.kernel.org/ubuntu/pool/main/libz/libzstd/libzstd1_1.3.3 +dfsg-2ubuntu1_amd64.deb 2. Extract it downloads. 3. cd into the extracted folder libzstd1_1.3.3+dfsg-2ubuntu1_amd64 4. extract "data" folder 5. cd into Downloads 6. Run following commands sudo cp libzstd1_1.3.3+dfsg-2ubuntu1_amd64/data/usr/lib/x86_64-linux- gnu/libzstd.so.1 /usr/lib/x86_64-linux-gnu/ sudo cp libzstd1_1.3.3+dfsg-2ubuntu1_amd64/data/usr/lib/x86_64-linux-gnu/libzstd.so.1.3.3 /usr/lib/x86_64-linux-gnu/ And dpkg works fine now -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766046 Title: dpkg-deb error processing libc6_2.27, libzstd.so.1 is missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1766046/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs