We have a server on namcheap and want to check a file. The kernel is

Linux version 4.18.0-513.18.1.lve.2.el8.x86_64

I believe it is redhat enterprise linux.

I ssh to the server but when I try to sudo, I get the following:

sudo ls
-bash: sudo: command not found

 su
-bash: su: command not found

When I try to install sudo, I get the following:

apt-get install sudo
-bash: apt-get: command not found

yum install sudo
-bash: yum: command not found

dnf
-bash: dnf: command not found

When I try su, I get:

su
-bash: su: command not found

Any ideas, how I install or sudo on this server?