Dspace installation error

[Dr Shankar Reddy Kolle]

Dear Sir/madam

Greetings for the day.

I am finding a error while installing nvm :

Command 'nvm' not found, did you mean:
  command 'nvim' from snap nvim (v0.9.4)
  command 'nsm' from snap nift (3.0.3)
  command 'gvm' from snap gvm (1.1.0)
  command 'vm' from deb mgetty-voice (1.2.1-1.1)
  command 'lvm' from deb lvm2 (2.03.11-2.1ubuntu4)
  command 'nsm' from deb linuxptp (3.1.1-3)
  command 'pvm' from deb pvm (3.4.6-3.2)
  command 'npm' from deb npm (8.5.1~ds-1)
  command 'num' from deb quickcal (2.4-1)
  command 'nvme' from deb nvme-cli (1.16-3ubuntu0.1)
  command 'nam' from deb nam (1.15-5.2)
  command 'nvi' from deb nvi (1.81.6-17)
  command 'kvm' from deb qemu-system-x86 (1:6.2+dfsg-2ubuntu6.15)
  command 'nm' from deb binutils (2.38-4ubuntu2.3)
  command 'nvim' from deb neovim (0.6.1-3)
See 'snap info <snapname>' for additional versions.

Please provide the solution.