Verify SHA256 checksums
After downloading an ISO, compare its SHA256 checksum with the checksum published by the official Linux distribution. On Linux you can usually run sha256sum file.iso.
๐งฐ Online Tools
Online tools for network diagnostics, DNS checks, security validation and quick utilities for administrators, technicians and advanced users.
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Network and IP
5 tools
IP
IP Geolocation
Locate any IP on an interactive map. VPN/Proxy detection included.
IP
My IP
What is my public IP? Complete connection information.
Red
Ping / Traceroute
Check latency and network path to any server.
IPv6
IPv6 Checker
Check whether your connection and a domain support IPv6.
Subnet
Network Calculator
Calculate subnets, hosts, IP ranges and network masks.
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DNS and Domains
5 tools
Whois
Whois Lookup
Query domain and IP registration information.
DNS
DNS Lookup
Resolve domains and get A, MX, CNAME, TXT records and more.
DNS
DNS Propagation
Check from multiple servers around the world.
ASN
ASN Lookup
Get Autonomous System information for any IP.
Reverse
Reverse Lookup
Get the hostname (PTR) associated with an IP.
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Security and Validation
5 tools
SSL
SSL Checker
Check SSL certificate validity and details.
Email
Email Validator
Validate emails and verify domain MX records.
Puertos
Port Scanner
Scan open ports on a server.
Links
Link Checker
Check whether links are broken or working correctly.
SHA-256
ISO Checksum Verifier
Calculate SHA-256, SHA-512 or SHA-1 locally and compare it with the official Linux ISO checksum.
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Utilities
3 tools
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Statistics
1 tool
Linux ISO help
Quick guides for downloading, verifying and installing Linux ISO images safely. These notes help beginners choose the right image and avoid common installation mistakes.
Create a bootable USB
Use a trusted USB writer such as Ventoy, Rufus, balenaEtcher or Fedora Media Writer. Always select the downloaded ISO and verify that the target USB drive is correct.
ISO vs torrent vs netinstall
An ISO is the standard installer image. A torrent can be faster and easier to resume. A netinstall image is smaller, but downloads packages during installation.
UEFI, BIOS and architecture
Most modern PCs use UEFI and 64-bit images. The labels x86_64 and amd64 usually mean the same 64-bit PC architecture.