Scripts
Level
42 entries
- 0009 CSV to JSON converter A small command-line tool that turns a CSV file into a JSON array of objects, with optional number detection, custom delimiters and… Beginner · How-to · Any system Script CSV & JSON · Files & automation 15 Oct 2026
- 0010 Find duplicate files by content Scans folders and lists files with identical content, using file size first and SHA-256 hashes second. It is read-only and only reports… Intermediate · How-to · Any system Script Files & automation 15 Oct 2026
- 0011 Bootstrap a new Python project with a venv A Bash script that creates a project folder with a virtual environment, .gitignore, requirements.txt and a starter main.py, then runs it to… Intermediate · How-to · Linux, macOS Script Environments & packages 15 Oct 2026
- 0019 fetch with timeout, retries and proper error handling A reusable fetchJson helper for Node 20+ and browsers that adds a timeout, retries with backoff for temporary failures, and clear errors… Intermediate · How-to · Any system Script Async code · Making requests 15 Oct 2026
- 0020 Debounce and throttle functions in plain JavaScript Two small dependency-free helpers that limit how often a function runs: debounce waits for a pause, throttle runs at most once per… Intermediate · How-to · Any system Script Patterns 15 Oct 2026
- 0021 Read and write files in Node.js with fs/promises A complete Node script that walks a folder, reads text files, and writes a JSON report safely, showing the everyday fs/promises calls… Beginner · How-to · Any system Script Node.js 15 Oct 2026
- 0022 Build a small Node.js CLI with util.parseArgs A complete, dependency-free command-line tool in Node: options and flags with parseArgs, input from files or a pipe, help text, and meaningful… Intermediate · How-to · Any system Script Node.js 15 Oct 2026
- 0023 Run async tasks with a concurrency limit A small mapLimit helper that runs an async function over many items with at most N in flight, keeps result order, stops… Advanced · How-to · Any system Script Async code 15 Oct 2026
- 0032 First-time Git setup: name, email, default branch, SSH or HTTPS Tell Git who you are, pick sensible defaults, and choose between SSH and HTTPS for GitHub. Includes a small script that applies… Beginner · How-to · Linux, macOS, Windows Script Setup 15 Oct 2026
- 0043 Delete local branches that are already merged A bash script that lists local branches fully merged into main and, if you ask, deletes them. It never touches the current… Intermediate · How-to · Linux, macOS, Windows Script Housekeeping 15 Oct 2026
- 0044 A starter set of Git aliases Short names for the Git commands you type all day, such as a one-line status, a graph log, and a safe force… Beginner · Reference · Linux, macOS, Windows Script Git tools 15 Oct 2026
- 0058 Safe bash script template with set ‑euo pipefail and trap A starting point for bash scripts that stops on errors, rejects unset variables, cleans up temp files on exit and parses options.… Intermediate · Reference · Linux, macOS Script Shell scripting 15 Oct 2026
- 0059 Incremental snapshot backups with rsync A bash script that copies a folder into dated snapshots with rsync, hard-links unchanged files to the previous snapshot to save space,… Advanced · How-to · Linux, macOS Script Backups & syncing · Shell scripting 15 Oct 2026
- 0060 Find the biggest files and folders eating your disk A short bash script that lists the largest files over a size limit and the largest subfolders, using find, du, sort and… Beginner · How-to · Linux, macOS Script Finding files & text · Text processing 15 Oct 2026
- 0061 Fix: Address already in use (free a busy port) Your server cannot start because another process already listens on its port. This script shows which process holds the port and stops… Intermediate · Fix · Linux, macOS Script Processes & ports · Shell scripting 15 Oct 2026
- 0075 CSV to JSON converter (Python, standard library) Convert any CSV file with a header row into a JSON array or JSON Lines. Handles quoted fields, a byte order mark,… Beginner · How-to · Any system Script CSV & JSON · Files & automation 15 Oct 2026
- 0076 jq recipes: 23 one-liners for JSON on the command line A runnable collection of jq filters for everyday JSON work: pick fields, filter with select, reshape, sort, count, group, pass shell variables,… Intermediate · Reference · Linux, macOS, Windows Script Command-line tools · jq & JSON on the command line 15 Oct 2026
- 0077 SQL cheat sheet: a runnable reference for everyday queries One SQL file that builds a tiny database and demonstrates filtering, sorting, grouping, joins, CASE, CTEs, window functions, safe updates and indexes.… Beginner · Reference · Any system Script Joins · Queries 15 Oct 2026
- 0083 Test a JSON API with curl A runnable bash script showing the curl commands you need most when testing an API: GET, POST JSON, custom headers, Bearer tokens,… Beginner · How-to · Linux, macOS, Windows Script Authentication · Making requests 15 Oct 2026
- 0084 Tiny JSON echo server for testing HTTP clients A standard-library Python server that echoes back the method, path, query, headers, and body of every request, and can return any status… Intermediate · How-to · Any system Script Files & automation · Making requests 15 Oct 2026
- 0085 fetch with timeout, retries, and exponential backoff A drop-in fetch wrapper that times out slow requests, retries network errors and 429/5xx responses with jittered exponential backoff, and honors Retry-After. Advanced · How-to · Any system, Browser Script Async code · Making requests 15 Oct 2026
- 0108 List all Proxmox VE guests with status and locks (pvesh + jq) A Bash script that lists every VM and container in the cluster with node, status, lock, memory and uptime, using the Proxmox… Intermediate · Reference · Linux Script Shell scripting · VMs & containers 15 Oct 2026
- 0109 A vzdump wrapper script with checks, retention and a log file A Bash wrapper around vzdump that checks the target storage first, backs up chosen guests or all guests with zstd and keep-last… Intermediate · How-to · Linux Script Backup & restore · Shell scripting 15 Oct 2026
- 0128 virsh status report: VMs, state, resources and IPs in one table A read-only bash script that prints a libvirt/KVM host report: virtual networks, storage pools, and every VM with its state, vCPUs, memory,… Intermediate · Reference · Linux Script Basics 15 Oct 2026
- 0139 Collect describe, events and logs of a failing Kubernetes pod A bash script that saves a pod's status, describe output, events, YAML, current and previous logs of every container and its node… Intermediate · How-to · Linux, macOS Script Troubleshooting 15 Oct 2026
- 0141 List Kubernetes pods that are not Running and Ready A bash script that lists every pod across namespaces that is Pending, failing or running but not ready, with the waiting reason,… Intermediate · Reference · Linux, macOS Script Troubleshooting 15 Oct 2026
- 0158 Collect an OpenShift project report with oc A read-only bash script that gathers a project's workloads, pods, routes, builds, storage and warning events, plus describe output and logs of… Intermediate · How-to · Linux, macOS Script Deploying applications · Troubleshooting 15 Oct 2026
- 0159 OpenShift cluster health snapshot: oc adm, nodes, MachineConfigPools and updates An admin overview of OpenShift day-2 checks (cluster version, update channels, cluster Operators, nodes, MachineConfigPools, must-gather) with a read-only bash script that… Advanced · Reference · Linux, macOS Script Cluster administration · Troubleshooting 15 Oct 2026
- 0168 Server health check script: disk, memory and failed units A dependency-free bash script that checks disk and inode usage, available memory, load, failed systemd units and pending reboots, and exits non-zero… Intermediate · Reference · Linux Script Disks, LVM & filesystems · Services & systemd 15 Oct 2026
- 0171 Extend an LVM logical volume and filesystem online (safe script) A bash script that grows the LVM volume behind a mount point, checks the filesystem type and free space first, and runs… Advanced · How-to · Linux Script Disks, LVM & filesystems 15 Oct 2026
- 0178 Create a sudo user with an SSH key and disable password login A bash script that creates an admin user in the sudo or wheel group, installs their SSH public key and can switch… Advanced · How-to · Linux Script Keys & config · Users, sudo & hardening 15 Oct 2026
- 0182 Your first Ansible playbook: install nginx and publish a page A complete beginner playbook that installs nginx on Debian or Ubuntu servers, starts it at boot and deploys a home page, with… Beginner · How-to · Linux, macOS Script Ansible 15 Oct 2026
- 0183 Ansible variables, templates and handlers: configure an nginx site Use group variables, Jinja2 templates and handlers together: render an nginx server block from variables, test the config and reload nginx only… Intermediate · How-to · Linux, macOS Script Ansible 15 Oct 2026
- 0188 First Terraform configuration: variables, a module and outputs (no cloud needed) A complete Terraform project that writes local files with the hashicorp/local provider, so you can practice init, plan, apply, modules and destroy… Intermediate · How-to · Any system Script Terraform 15 Oct 2026
- 0206 Nightly PostgreSQL backup script with pg_dump and rotation A bash script for cron that dumps cluster roles plus every database in custom format into a dated folder, checks each archive,… Intermediate · How-to · Linux Script Backup & restore 15 Oct 2026
- 0207 Find long-running PostgreSQL queries and slow statements A psql-based script that lists sessions whose current query or open transaction is older than a threshold, plus pg_stat_statements queries to find… Intermediate · Reference · Linux Script Performance & tuning · Roles & administration 15 Oct 2026
- 0208 Check PostgreSQL replication lag with a monitoring script A bash check that detects whether it runs on a primary or a standby, measures replication lag in bytes and seconds, and… Advanced · How-to · Linux Script Replication & high availability 15 Oct 2026
- 0219 mysqldump nightly backup with rotation (bash) A cron-ready bash script that dumps each MySQL or MariaDB database to its own compressed file with --single-transaction, verifies it and deletes… Intermediate · How-to · Linux Script Administration · Backup & restore 15 Oct 2026
- 0223 Oracle users, roles and tablespaces: setup script and usage report (SQL) A SQL*Plus/SQLcl script that creates a tablespace, a role and an application user inside a PDB, then reports tablespace usage from the… Intermediate · How-to · Any system Script Administration · Security & access 15 Oct 2026
- 0224 RMAN backup basics: ARCHIVELOG mode, a nightly backup script and restore Enable ARCHIVELOG mode, set an RMAN retention policy, run a nightly full backup with archived logs from cron, and learn the restore… Advanced · How-to · Linux Script Administration · Backup with RMAN 15 Oct 2026
- 0234 Nightly mongodump backup with rotation A bash script for cron that writes a compressed mongodump archive each night, keeps the password out of the process list, checks… Intermediate · How-to · Linux Script Administration · Database operations 15 Oct 2026
- 0237 Use Redis as a cache: TTLs, maxmemory and an eviction health report Set a memory limit and an eviction policy so Redis behaves like a cache, give keys TTLs, then run a bash report… Intermediate · How-to · Linux, macOS Script Administration & persistence · Basics 15 Oct 2026