30 CLI One-Liners That Will Blow Your Mind

1 Data Analyze any CSV in 1 command

evtool csv-stats sales_data.csv

Shows column types, mean, std dev, min/max, percentiles, and a correlation matrix. No pandas, no Jupyter. Just one command.

2 Files Batch rename files with dry-run

evtool ren '*.txt' --prefix 'backup_' --dry-run

Preview all renames before applying. Supports prefix, suffix, replace, regex, numbering, and extension change.

3 System Live system monitor (TUI)

evtool sysmon

Real-time curses TUI showing CPU, memory, disk, network, and top processes. Like htop, but zero dependencies.

4 Data Compare JSON files

evtool json-diff old.json new.json

Shows added, removed, and changed keys with colorized diff. Great for API response debugging.

5 Network HTTP load test (Siege-like)

evtool siege-lite -c 10 -n 100 https://example.com

10 concurrent users, 100 total requests. Shows latency percentiles, status code distribution, throughput. No wrk or ab needed.

6 Dev Generate secure passwords

evtool passgen 24 --symbols --numbers --upper

Cryptographically secure random passwords. Customize length, character types, and count.

7 Data Convert CSV to JSON

evtool csv2json data.csv > data.json

One-liner CSV-to-JSON conversion. Also: json2csv, yaml2json, json2yaml, xml2json, toml2json, and more.

8 System Find largest files/dirs

evtool dirsize /home --sort desc --top 10

Scan directory tree, show top 10 largest directories. Also: disk-usage for a high-level overview.

9 Dev Generate QR code from terminal

evtool qrcode "https://github.com/evolver-dev/evolver-tools" > repo.png

Generates a QR code PNG directly in the terminal. Pipe to file, display, or share.

10 Fun Weather forecast

evtool weather-cli Tokyo --days 3

Real weather data from wttr.in. Shows temperature, conditions, and forecast for any city.

11 Data Terminal bar chart from data

evtool chart-cli bar 12 7 9 5 --labels Q1,Q2,Q3,Q4

Unicode bar chart in terminal. Supports bar, stacked, horizontal, and line charts. Data-driven, no gnuplot.

12 Network Check SSL certificate info

evtool ssl-check example.com

Shows issuer, validity dates, SANs, and days until expiry. Also: cert-info for detailed PEM inspection.

13 Files Deduplicate files by content

evtool dedup-files /downloads --dry-run

Find and list duplicate files based on content hash (SHA256). Use --move or --delete to clean up.

14 Dev Check project health

evtool project-doctor /path/to/project

Scans for README, license, CI config, tests, pyproject.toml/package.json, and more. Reports missing files and issues.

15 System Kill process by port

evtool port-scan 3000 --kill

Find what's running on a port and kill it. Great for "port in use" errors.

16 Data Validate JSON files

evtool json-validate config.json

Validates JSON syntax and optionally against a JSON Schema. Also: yaml-validate, xml-format, ini2json.

17 Network DNS lookup + whois

evtool dns-lookup example.com --type ALL

Shows A, AAAA, MX, NS, TXT, CNAME records. Also: whois-lookup for domain registration info.

18 Security Scan for secrets in code

evtool secret-scanner /path/to/repo

Scans for API keys, tokens, passwords, and private keys in your codebase. Pattern-based detection.

19 Dev Pretty-print JSON from stdin

curl -s https://api.example.com | evtool json-pretty

Pipe any JSON input for colorized, indented output. A zero-dependency jq replacement for formatting.

20 Fun Cowsay with ASCII art

evtool cowsay "Zero deps in one install!"

Classic cowsay but built into the toolkit. Also: figlet, ascii-banner, emoji-cli, and matrix-rain.

21 Files Encrypt a file (AES)

evtool file-encrypt secret.txt

AES-256 encryption for any file. Also: file-decrypt, hash-file (SHA/MD5), and checksum-dir.

22 Data Filter CSV by condition

evtool csv-filter data.csv --column age --min 25 --max 40

Filter rows by numeric or text conditions. Also: csv-sort, csv-dedup, csv-merge, csv-concat.

23 System Live log monitor with highlights

evtool log-hawk /var/log/syslog

Tail a log file with colorized output — errors in red, warnings in yellow. Like follow with visual priority.

24 Dev Time any command (timer)

evtool timer "make build"

Measures elapsed time for any shell command. Also: stopwatch, pomodoro, countdown for productivity.

25 Network HTTP headers inspector

evtool http-headers https://example.com

Fetches and displays all HTTP response headers. Useful for debugging CORS, caching, and security headers.

26 Security Check password strength

evtool password-strength "MyP@ssw0rd!"

Analyzes password entropy, length, character diversity, and common patterns. Scores from 0-100.

27 Data Query JSON with jq-like syntax

cat data.json | evtool jsonql '$.users[?(@.age > 25)].name'

JSON query language similar to jq. Filter, map, and extract data from complex JSON structures.

28 Dev Code statistics for any project

evtool code-stats /path/to/project

Lines of code, file count, language breakdown, and complexity metrics. No cloc needed.

29 Files Find empty directories

evtool find-empty /home --delete

Find and optionally remove empty directories recursively. Also: find-dups for duplicate files.

30 Dev CIDR subnet calculator

evtool subnet 192.168.1.0/24

Network address, broadcast, usable hosts, subnet mask, and wildcard. Quick network math.