Adding a CPU miner to smOS

In this tutorial we add the xmrig cpu miner to smOS. It’ll be helpful if you have a basic understanding of linux cli. I have a tutorial here Linux CLI (Command Line Interface) primer for beginners — Steemit

Screenshot 2018-02-12 22.18.14.png

I won’t cover how to ssh here. See my bminer tutorial for that. Here is how to secure ssh for smOS https://steemit.com/mining/@greerso/securing-ssh-for-smos.

Install xmrig dependencies.
sudo apt-get install git build-essential cmake libuv1-dev libmicrohttpd-dev
. Download xmrig-2.4.4 (version 2.4.4 at the time of writing) from GitHub. You can read more about xmrig on their GitHub repo GitHub - xmrig/xmrig: Monero (XMR) CPU miner.
```
git clone https://github.com/xmrig/xmrig.git
cd xmrig-2.4.4
```
Make a directory to compile xmrig into.
```
mkdir build
cd build
```
Compile xmrig.
```
cmake ..
make
```

Make a directory in the smOS miners_org and move xmrig into it.

sudo mkdir /root/miner_org/xmrig-2.4.4&&sudo mv xmrig /root/miner_org/xmrig-2.4.4/

Make sure that the new miner is executable.

sudo chmod +x /root/miner_org/xmrig-2.4.4/xmrig

Create a config file in the xmrig directory.

sudo nano /root/miner_org/xmrig-2.4.4/config.json

and paste the following text replacing your own preferences:

{
"algo": "cryptonight",  // cryptonight (default) or cryptonight-lite
"av": 0,                // algorithm variation, 0 auto select
"background": true,    // 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": null,   // 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": 75,    // 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
"syslog": false,        // use system log for output messages
"threads": null,        // number of miner threads
"pools": [
    {
        "url": "us-east.cryptonight-hub.miningpoolhub.com:20596",   // URL of mining server
        "user": "greerso.Trio_CPU",                        // username for mining server
        "pass": "x",                       // password for mining server
        "keepalive": true,                 // send keepalived for prevent timeout (need pool support)
        "nicehash": false                  // enable nicehash/xmrig-proxy support
    }
],
"api": {
    "port": 3333,                             // 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
    }
}

Exit nano and save.

[ctrl+x]
y
[enter]

If you wish to test the miner, change the background mode above to "background": false and run the command
```
sudo /root/miner_org/xmrig-2.4.4/xmrig
```
You will see the miner output to the screen.
```
[ctrl]+c
```
to cancel

Run xmrig as a service.

sudo nano /lib/systemd/system/xmrig.service

paste the following text

[Unit]
Description=XMRig Daemon
After=network.target

[Service]
Type=forking
GuessMainPID=no
ExecStart=/root/miner_org/xmrig-2.4.4/xmrig -c /root/miner_org/xmrig-2.4.4/config.json -B
Restart=always
User=miner

[Install]
WantedBy=multi-user.target

Exit nano and save.

[ctrl+x]
y
[enter]

Enable the new service.

sudo systemctl daemon-reload
sudo systemctl enable xmrig.service
sudo systemctl start xmrig.service

You can control the service with the following commands

sudo systemctl status xmrig # Get status of service
sudo systemctl stop xmrig # Stop the service
sudo systemctl restart xmrig # restart the service

The cpu miner will not be able to be monitored via simplemining.net but it does have an api accessible on the port specified in the config.json file.

Adding a CPU miner to smOS | Ecency