#devtools
22 post(s)
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AI Agent Skills:What They Are and How to Use Them
Hands-on Cursor Agent Skills for beginners — what a skill is, where it lives, how to write a SKILL.md, and how the agent picks it up.
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Stay Off Main:Git Branches Without the Fear
Hands-on Git branching — create a feature branch, push it with upstream tracking, merge back into main, and clean up local and remote branches.
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When Push Fails:Merge Conflicts, Revert, and Rollback
Hands-on Git for the stuck push — fetch remote changes, resolve merge conflicts, then revert or roll back commits safely.
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Git Without the Panic:Init, Commit, Push
Hands-on Git for beginners — init a repo, stage and commit safely, read diffs, and push your first project to a remote.
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Linux Troubleshooting Toolkit:Diagnose Crashes and High Load
Hands-on triage with htop, journalctl, dmesg, and lsof — diagnose high load and crashes by chaining the right tool at each step.
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Advanced File Search & Manipulation:find, xargs, and sed
Hands-on batch editing on the command line — find the right files, feed them safely through xargs, and rewrite them with sed.
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Linux rsync:Sync Files Efficiently, Locally and Remote
Hands-on rsync recipes for everyday work — incremental sync, remote backups over SSH, progress output, and safe dry-runs.
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Linux sudo and /etc/sudoers:Manage Privileged Access with Intent
Hands-on sudo and sudoers recipes — run commands as root or another user, edit policy safely with visudo, and delegate fine-grained privileges without handing out full root.
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Linux du and df:Find Disk Space Hogs
Hands-on df and du recipes — check filesystem free space, hunt directory hogs, and resolve “no space left on device” with confidence.
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Linux ss and netstat:Monitor Network Connections
Hands-on ss and netstat recipes — list listening sockets, inspect open connections, check routing tables, and read interface statistics.
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Linux kill, pkill, and killall:Send Signals Safely
Hands-on kill, pkill, and killall recipes — choose SIGTERM, SIGKILL, or SIGHUP, target the right PIDs, and stop processes without wrecking managed services.
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Linux lsof:See Who Is Using a File or Port
Hands-on lsof recipes for everyday work — find which processes hold files open, bind ports, or leak file descriptors.
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Linux chmod, chown, and umask:Control Who Can Touch a File
Hands-on chmod, chown, and umask recipes — decode numeric vs symbolic modes, fix ownership, and understand default permissions for new files.
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Linux xargs:Turn Lists into Command Arguments
Hands-on xargs recipes for everyday work — feed find and grep into commands, batch safely, and place arguments where they belong.
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Linux journalctl:Query the systemd Journal
Hands-on journalctl recipes for everyday work — filter by unit, severity, time range, and boot, then read the results with confidence.
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Linux sed:Edit Streams Without Opening an Editor
Hands-on sed recipes for everyday work — substitute text, delete lines, edit files in place, and reshape output in pipelines.
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Linux ps and pgrep:Find Running Processes
Hands-on ps and pgrep recipes — locate processes by PID, user, memory footprint, or command path without a live monitor.
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Linux dmesg:Read the Kernel Ring Buffer
Hands-on dmesg recipes for everyday work — inspect boot messages, chase hardware faults, filter by level, and watch the kernel live.
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Linux top, htop, and btop:Watch CPU, RAM, and Load
Hands-on top, htop, and btop recipes — read load averages, find CPU and memory hogs, and triage a busy box in real time.
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Linux find:Locate Files by What You Know
Hands-on find recipes for everyday work — hunt by name, type, size, and time, then act on matches with confidence.
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Linux awk:Slice Fields and Summarize Streams
Hands-on awk recipes for everyday work — pick columns, filter rows, change separators, and compute totals in pipelines.
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Linux grep:Search Files Like You Mean It
Hands-on grep recipes for everyday work — find text, filter logs, search codebases, and pipe results with confidence.