If npm install moralis fails on Linux, first check your Node.js and npm versions and read the actual npm error. Use a currently supported Node.js release, then retry in a clean project directory with a working network connection.
Only install an operating-system package such as libudev-dev if your error names it or a native dependency that requires it. It is not a general requirement for installing Moralis.
If the problem continues, send Moralis support the Node/npm versions, Linux distribution, the relevant error lines, and a minimal reproduction. Remove API keys and other secrets from logs before sharing them.