Linux Course

Linux is widely used in servers, routers, and firewalls due to its flexibility, stability, and open-source nature. It supports powerful networking tools and protocols.

No prior experience is required. The course typically starts with Linux basics and gradually introduces networking concepts and hands-on tasks.

You’ll learn command-line operations, configuring network interfaces, setting up firewalls, troubleshooting connectivity, and managing Linux-based servers.

Tools like ifconfig, ip, netstat, ping, traceroute, iptables, and tcpdump are introduced to analyze and configure networks effectively.

Yes, you'll explore setting up DNS, DHCP, FTP, and web servers on Linux, along with network file systems and access permissions.

Absolutely. It builds a strong foundation helpful for certifications like RHCE, CompTIA Linux+, and LPIC, which are valued in the industry.

Linux offers robust security features, such as firewalls (iptables), SELinux, and SSH, which help in protecting and securing networks.

Yes, combining Linux and networking skills opens job opportunities as a Network Administrator, System Engineer, or Linux Support Technician.

Most training includes lab exercises with physical or virtual Linux systems to simulate real-world networking scenarios and problem-solving.

iptables is a powerful command-line utility that manages packet filtering and NAT in Linux. It allows administrators to define firewall rules for incoming and outgoing traffic. This is essential for securing Linux-based networks and controlling unauthorized access.

The ip command is a modern replacement for ifconfig. It’s used to manage network interfaces, routing tables, and tunnels. It provides more detailed and flexible options for configuring and monitoring Linux network settings.

You can manually configure a static IP by editing /etc/network/interfaces or using the nmcli tool on Red Hat-based systems. Assign the IP address, netmask, gateway, and DNS, then restart the networking service. This setup ensures reliable server communication.

Start by checking interface status with ip a or ifconfig, then test connectivity with ping. Use netstat, traceroute, and dig to identify routing or DNS problems. Check firewall rules via iptables and logs for deeper analysis.

This file maps hostnames to IP addresses locally, allowing name resolution without querying a DNS server. It’s helpful in testing or when DNS is unavailable. Entries here take precedence over DNS queries.

SSH (Secure Shell) allows encrypted remote access to Linux machines over a network. It enables administrators to securely configure, monitor, and troubleshoot remote servers. SSH keys and port configurations add further layers of protection.

Both commands show network connections, but ss is faster and more detailed. netstat is older and being phased out. ss displays active sockets and supports filtering, making it ideal for performance and connection monitoring.

The loopback interface (lo) is a virtual network interface used to test network software on the same machine. It uses the IP address 127.0.0.1 and is essential for internal communication and troubleshooting local services.

You can configure DNS by editing /etc/resolv.conf to include preferred nameservers. For more permanent or system-wide changes, tools like systemd-resolved or NetworkManager can be used. This ensures domain name resolution works correctly.