官方的lammps ubuntu的版本太老了,LAMMPS (20 Nov 2019)。Ubuntu版本的维护者在个人首页发布了最新到2021-1-20的版本:
Adding this PPA to your system
You can update your system with unsupported packages from this untrusted PPA by adding ppa:gladky-anton/lammps to your system's Software Sources. (Read about installing)
sudo add-apt-repository ppa:gladky-anton/lammps
sudo apt update