Suricata is not directly install in ubuntu 20.04 by just using command apt-get install suricata
You have to build suricata to run in ubuntu 20.04
Installation steps:
1.) Download the suricata tar file from the official website.
2.) Untar the file using command “tar -xvf <TAR_FILE_NAME>”
3.) Go the extracted directory
4.) Run command “./configure”
5.) Run command “make”
6.) Run command “make install”