1. First you need a XMR / Monero wallet

https://moneroaddress.org/ or from here https://mymonero.com/#/

Copy your newly generated monero address and save your private keys and mnemonic in a safe place .

2.type these linux terminal commands

sudo apt-get install git build-essential cmake libuv1-dev libmicrohttpd-dev
git clone https://github.com/xmrig/xmrig.git
cd xmrig
mkdir build
cd build
cmake ..
make

then type in terminal or use gedit to eddit

nano config.json

and copy paste these lines in config.json also put your wallet address and user password in this file where it is required

{
"algo": "cryptonight", // cryptonight (default) or cryptonight-lite
"av": 0, // algorithm variation, 0 auto select
"background": false, // true to run the miner in the background
"colors": true, // false to disable colored output
"cpu-affinity": null, // set process affinity to CPU core(s), mask "0x3" for cores 0 and 1
"cpu-priority": 5, // set process priority (0 idle, 2 normal to 5 highest)
"donate-level": 1, // donate level, mininum 1%
"log-file": null, // log all output to a file, example: "c:/some/path/xmrig.log"
"max-cpu-usage": 50, // maximum CPU usage for automatic mode, usually limiting factor is CPU cache not this option.
"print-time": 60, // print hashrate report every N seconds
"retries": 5, // number of times to retry before switch to backup server
"retry-pause": 5, // time to pause between retries
"safe": false, // true to safe adjust threads and av settings for current CPU
"threads": null, // number of miner threads
"pools": [
{
"url": "put mining pool url here", // URL of mining server
"user": "your wallet address", // username for mining server
"pass": "worker:password", // password for mining server
"keepalive": true, // send keepalived for prevent timeout (need pool support)
"nicehash": false // enable nicehash/xmrig-proxy support
}
],
"api": {
"port": 0, // port for the miner API https://github.com/xmrig/xmrig/wiki/API
"access-token": null, // access token for API
"worker-id": null // custom worker-id for API
}
}

then start xmrig by typing

./xmrig

If you need help please ask in comment .

Thanks