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nmap: Network Scanning and Security Auditing
nmap (Network Mapper) is a powerful open-source utility for network discovery and security auditing. It provides a wide range of features including host discovery, port scanning, OS detection, and service version detection, making it essential for understanding network infrastructure and identifying potential security vulnerabilities.
nslookup: DNS Query Tool (Deprecated)
nslookup is a command-line tool used to query Domain Name System (DNS) related information. It can be used to find the IP address of a specific domain, name server information, and more. It is currently not recommended for use and has been superseded by `dig` or `host` commands.
openssl-ciphers: Managing SSL/TLS Cipher List
The openssl-ciphers command is used to display and manage the list of SSL/TLS ciphers supported by the OpenSSL library. It is useful for checking the list of ciphers for a specific protocol version (e.g., SSLv3, TLSv1.2) or for validating and interpreting a cipher string.
ping Command Guide: Checking Network Connectivity
`ping` is a utility used to test whether a host can be reached over an IP network. By sending ICMP (Internet Control Message Protocol) echo request packets to the target host and waiting for a response, it measures the network connection status, packet loss rate, and round-trip time (RTT). It is one of the most basic tools for network troubleshooting.
Mastering the scp Command
This guide covers the `scp` command, which uses the Secure Copy Protocol (SCP) to securely copy files between local and remote hosts on Linux. This tool allows you to easily and securely transfer files over the network.
sftp: Secure File Transfer Tool
The `sftp` command is an interactive command-line client for securely transferring files over SSH (Secure Shell). Unlike `ftp`, it encrypts all communications, providing superior security, and is used to upload, download, and manage files between a local and a remote server.
ss Command Guide: Checking Socket Statistics (netstat Alternative)
`ss` command (socket statistics) is a powerful and modern utility used to check network socket-related information on Linux systems. It replaces the older `netstat` command, providing faster, more detailed, and efficient socket information. It is an essential tool for monitoring network activities and troubleshooting issues, such as network connection status, listening ports, and routing tables. Use this guide to learn various applications of the `ss` command.
SSH (Secure Shell) Command Guide
SSH (Secure Shell) is a network protocol that allows secure access to remote computers and the execution of commands. It provides data security through encrypted communication and is used for various purposes such as remote server management and file transfer. Use this guide to learn about the main features and usage of SSH.
ssh-keygen: Generate and Manage SSH Key Pairs
ssh-keygen is a utility used to generate, manage, and convert OpenSSH authentication key pairs (public and private keys). It is a core tool for securely connecting to remote servers via SSH or authenticating with services like Git.
sshfs: Mount Remote File Systems via SSH
sshfs is a client that allows you to mount a directory from a remote server onto your local file system using the SSH File Transfer Protocol. This enables you to browse and edit remote files as if they were on a local disk. It operates based on FUSE (Filesystem in Userspace).
Complete Guide to the Telnet Command
`telnet` is a network protocol and command that allows you to connect to a remote host, open a terminal session, and execute commands. Due to security vulnerabilities, it is primarily used to check if specific ports on network devices are open. SSH (Secure Shell) is the modern secure protocol that replaces telnet.
Guide to the wget Command: Downloading Files from the Web
`wget` (short for Web Get) is a non-interactive command-line utility used to download files from web servers using HTTP, HTTPS, and FTP protocols. It can operate in the background and has the ability to automatically resume downloads in case of network issues, making it particularly useful for large files or unstable network environments. Use this guide to learn the basic usage of `wget` and its various download options.