All Articles

Search files and folders with find, build safe bulk actions with xargs, edit text in place with sed, and slice or summarize data with awk. Includes mass rename, project wide search and replace, CSV summaries, and safety tips.

Search and shape text at the command line using grep for matching, cut for field extraction, sort and uniq for counting and ranking, wc for quick totals, and tee for logging and branching pipelines. Includes regex basics and practical log examples.

Discover storage devices, partitions, and filesystems. Learn lsblk, mount and umount, persistent mounts with /etc/fstab, labels and UUIDs, space checks with df and du, and a safe hands-on flow to add a new disk in a VM. Includes a quick swapfile recipe and basic checks.

Generate and use SSH keys, configure ssh-agent and ~/.ssh/config, harden authentication, and transfer files with scp and rsync over SSH. Learn host verification, port forwarding, and safe defaults.

Inspect and configure IP addresses and routes, test connectivity, resolve names, and inspect sockets using standard Linux tools. Includes NetworkManager with nmcli and common resolver setups.

Learn repositories, indexes, signatures, search, install, remove, update, history, cache cleanup, and repository configuration across Debian or Ubuntu, Fedora or RHEL family, and Arch Linux.

Learn how to view and manage processes, use job control in the shell, send signals, adjust priority with nice and renice, detach or persist programs, and inspect related files in /proc.

Understand Unix permissions, users and groups, chmod symbolic and numeric modes, directory execution semantics, sticky, setuid, setgid, default permissions with umask, and a short intro to ACLs.

Learn how Linux accounts work, how to create and manage users and groups, how to grant least privilege with sudo, and how to keep account data secure.

Use less to page files, head and tail to preview, follow logs in real time, and edit safely with nano and a gentle Vim intro. Set EDITOR and PAGER, use sudoedit for system files, and learn search and replace.

Learn the Linux directory layout, absolute and relative paths, safe navigation, file inspection, symlinks, mounts, and space usage with practical commands.

Learn the structure of a command, how options and arguments work, how quoting changes behavior, how PATH finds programs, how to use help, and how to work faster with history and completion.

Pick a distro, install safely in VM or WSL or bare metal, learn the terminal, and build good habits from day one.