Top 6 Most Commonly Used Server Types

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1. Web Server

Hosts websites and delivers web content to clients over the internet.

You Should Know:

  • Apache HTTP Server: 
    sudo apt install apache2 
sudo systemctl start apache2 
sudo systemctl enable apache2
  • Nginx: 
    sudo apt install nginx 
sudo systemctl start nginx 
sudo systemctl enable nginx
  • Check Web Server Status: 
    curl -I http://localhost

2. Mail Server

Handles sending, receiving, and routing emails across networks.

You Should Know:

  • Postfix (SMTP Server): 
    sudo apt install postfix 
sudo systemctl start postfix
  • Dovecot (IMAP/POP3 Server): 
    sudo apt install dovecot-core dovecot-imapd 
sudo systemctl start dovecot
  • Test Email Sending: 
    echo "Test Email" | mail -s "Subject" [email protected]

3. DNS Server

Translates domain names into IP addresses.

You Should Know:

  • Bind9 (DNS Server): 
    sudo apt install bind9 
sudo systemctl start bind9
  • Check DNS Resolution: 
    dig example.com 
nslookup example.com
  • Edit DNS Zones: 
    sudo nano /etc/bind/named.conf.local

4. Proxy Server

Acts as an intermediary for security and performance.

You Should Know:

  • Squid Proxy: 
    sudo apt install squid 
sudo systemctl start squid
  • Configure Squid ACLs: 
    sudo nano /etc/squid/squid.conf
  • Test Proxy Access: 
    curl -x http://proxy_ip:3128 http://example.com

5. FTP Server

Facilitates file transfers between clients and servers.

You Should Know:

  • vsftpd (FTP Server): 
    sudo apt install vsftpd 
sudo systemctl start vsftpd
  • Secure FTP with SFTP: 
    sftp user@server_ip
  • Upload/Download Files: 
    put local_file 
get remote_file

6. Origin Server

Hosts central content for CDN distribution.

You Should Know:

  • Nginx as Origin Server: 
    sudo nano /etc/nginx/nginx.conf
  • Cache Control Headers: 
    location / { 
add_header Cache-Control "public, max-age=3600"; 
}
  • Test CDN Caching: 
    curl -I http://origin-server.com

What Undercode Say

Understanding server types is crucial for IT infrastructure. Here are some additional commands for deeper learning:

  • Check Server Load: 
    uptime 
top
  • Network Monitoring: 
    netstat -tuln 
ss -tuln
  • Firewall Rules (UFW): 
    sudo ufw allow 80/tcp 
sudo ufw enable
  • Log Analysis: 
    sudo tail -f /var/log/syslog 
journalctl -xe

Expected Output:

A well-configured server environment with optimized performance, security, and reliability.

Prediction:

As cloud computing evolves, hybrid server setups (combining web, DNS, and proxy servers) will dominate for scalability and security.

Relevant URL:

Free System Design PDF

References:

Reported By: Alexxubyte Systemdesign – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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