Linux

How to work with multiple files in Vim using buffers, splits, and tabs — and when to use each one.

Searching, substitution, regex, jumping between locations, and marks — the tools that let you move through files with precision.

Registers for managing multiple clipboards, macros for automating repetitive edits, and power commands that save time daily.

Understanding Vim’s composable grammar — operators, motions, text objects, and counts — and why it makes editing faster than any other approach.

How to configure Vim with .vimrc — essential settings, key mappings, the leader key, and a practical starter configuration.

A practical introduction to Vim — modes, movement, basic editing, and the commands you need to be productive from day one.

A practical guide to environment variables in Linux — how they work, how to set them, where they’re loaded from, and common use cases.

A practical guide to tar and gzip — creating archives, compressing files, extracting contents, and common patterns you’ll use daily.

A practical guide to using scp for secure file transfers between local and remote systems, covering common flags, patterns, and troubleshooting.

A practical guide to DNS covering record types, resolution flow, caching, and common tools for troubleshooting.

Production-level networking — BGP, anycast, container networking, mTLS, eBPF, service meshes, and network observability.

Deeper networking concepts mapped to OSI layers — packet captures, TCP internals, MTU issues, NAT, firewalls, and L4 vs L7 load balancing.

A practical breakdown of the 7 OSI layers, what happens at each one, the protocols involved, and how to troubleshoot at each level.

A practical guide to generating SSH keys with ssh-keygen, covering key types, common parameters, and best practices.