skip to content

networking (14)

z/OS FTP Reference

FTP from TSO, batch FTP via JCL, SITE parameters, transfer modes, FTPS, FTP.DATA configuration, and JES spool transfers.
ftp zos mainframe networking file-transfer web-researched

z/OS TCP/IP — NETSTAT, PING, Profile, and Diagnostics

Drive the z/OS Communications Server TCP/IP stack — NETSTAT variants, PING, TRACERTE, RESOLVE, PROFILE.TCPIP configuration, OMPROUTE, and SSH from z/OS UNIX, with end-to-end troubleshooting recipes.
zos mainframe tcpip networking netstat communications-server web-researched

aria2c Download Utility

Fast, multi-protocol download utility supporting HTTP(S), FTP, SFTP, BitTorrent, and Metalink with resumption and parallel connections.
aria2c download http ftp torrent networking cli web-researched

curl — HTTP Client

Transfer data with URLs. Covers HTTP methods, headers, authentication, forms, TLS, cookies, proxies, timeouts, parallel downloads, and a comprehensive recipe collection.
curl http api networking cli rest download web-researched

dig — DNS Lookup Toolkit

Query DNS records of any type from any resolver — A, AAAA, MX, TXT, NS, SOA, SRV, CAA — with formatted output, reverse lookups, and full delegation tracing.
dig dns networking cli debug web-researched

ip — iproute2 Networking

Modern replacement for ifconfig, route, and arp. Inspect and configure interfaces, addresses, routes, neighbour tables, and network namespaces with the iproute2 ip command.
ip iproute2 networking sysadmin cli routing web-researched

lsof & ss — Open Files and Sockets

Diagnose what's holding a port, which files a process has open, and the state of every TCP/UDP socket using lsof and the modern iproute2 ss utility.
lsof ss lsfd sockets networking processes debug cli sysadmin web-researched

ps, ss & netstat — Processes & Sockets

Inspect running processes (ps), list network connections and listening ports (ss / netstat). Covers output formats, filtering, process trees, and socket state analysis.
ps netstat ss processes networking sockets cli sysadmin web-researched

SSH Tunnels & Port Forwarding

Local, remote, and dynamic SSH tunnels — port forwarding, SOCKS proxies, jump hosts, ssh_config directives, agent forwarding, autossh persistence, post-quantum key exchange, and operational recipes.
ssh networking tunnels security socks proxy bastion autossh ssh-agent post-quantum web-researched

wget — File Downloader

Non-interactive network downloader. Covers single and batch downloads, recursive mirroring, authentication, resuming, rate limiting, and site archiving.
wget http download networking cli mirror wgetrc wget2 scraping cookies web-researched

xidel Web Scraping & Data Extraction

Extract data from HTML, XML, and JSON using XPath, CSS selectors, pattern matching, and JSONiq from the command line.
xidel webscraping xpath html xml json data-extraction cli web-researched

Networking Stack — OSI/TCP-IP, Sockets, TCP/UDP, MTU, NAT, DNS

How packets actually move: the OSI and TCP/IP layer models, the BSD socket API, TCP vs UDP, the three-way handshake, MTU/MSS, NAT and port translation, basic IP routing, and the full DNS resolution flow.
networking osi tcp-ip sockets tcp udp mtu nat routing dns sysadmin

httpx — Modern HTTP Client

Make sync and async HTTP requests with httpx. Covers GET/POST, async usage, HTTP/2, streaming, and how it compares to requests.
python httpx http api async networking

requests — HTTP for Humans

Make HTTP requests in Python with the requests library. Covers GET/POST, JSON, sessions, authentication, retries, and common pitfalls.
python requests http api networking