Linux Server Monitoring with Telegram Bot

Requirements

• Git.
• Nginx.
• PHP-FPM.
• PHP.
• BIND.
• Certbot.
• Telegram.

Installation

• Configure the Web Server and SSL: https://certbot.eff.org/lets-encrypt/centosrhel7-nginx.
• Cloning PHP source code: https://github.com/madfxr/servbot.git.
• Chat in Telegram with @BotFather (https://t.me/BotFather) and create a new bot.
• Get your API token (example: 613961047:AZFWy0k603kLssujSIkKacmKuxxxTnq8Wl4).
• In php file line 2, change <authorization_token> with your API token (example: 613961047:AZFWy0k603kLssujSIkKacmKuxxxTnq8Wl4).
• Upload the index.php file to your Web Server with SSL support.
• Then access the following URL: https://api.telegram.org/bot<authorization_token>/setWebhook?url=https://domain.tld/index.php in the web browser to set the webhook (example: https://api.telegram.org/bot613961047:AZFWy0k603kLssujSIkKacmKuxxxTnq8Wl4/setWebhook?url=https://domain.tld/index.php.
• Chat in Telegram with @BotFather (https://t.me/BotFather) and edit @yourBotName commands:

df - Report file system disk space usage
free - Display amount of free and used memory in the system 
ps - Report a snapshot of the current processes
top - Report a snapshot of the current processes
namedstatus - Show Internet domain name server service status
nginxstatus - Show HTTP and reverse proxy server, mail proxy server service status
phpfpmstatus - Show PHP FastCGI Process Manager service status
sshdstatus - Show OpenSSH SSH service status
date - Print or set the system date and time
uptime - Tell how long the system has been running
id - Print real and effective user and group IDs
ls - List directory contents
pwd - Print name of current/working directory
last - Show a listing of last logged in users
w - Show who is logged on and what they are doing
phpversion - Show PHP version number
sysinfo - Print system operation information
uname - Print system information
nc - Arbitrary TCP and UDP connections and listens
ping - Send ICMP ECHO_REQUEST to network hosts
telnet - User interface to the TELNET protocol
traceroute - Print the route packets trace to network host
curl - Transfer data from or to a server
dig - DNS lookup utility
whois - Client for the whois directory service

Notes

• SERVBot is still tried on CentOS 7 x86_64 only.
• If you are using another operating system, feel free to make changes to an existing PHP source code.