システムデスク

Convert between symbolic and numeric Linux file permissions, including special bits.

Build useradd commands with home directory, shell, groups, and expiry options.

Generate SSH key pairs in browser (Ed25519/RSA). The result stays on this page.

Builds cron expressions and explains them in plain English. The result stays on this page.

List the next N run times of a cron expression. The result stays on this page.

Generates .service and .timer unit files from a form. The result stays on this page.

Build journalctl filters by unit, time, priority. The result stays on this page.

Builds find commands with filters for name, size, time, permissions. The result stays on this page.

Builds tar create/extract/list commands with compression options. The result stays on this page.

Builds rsync commands for local/remote sync and backups. The result stays on this page.

Build grep/egrep commands with common flags. The result stays on this page.

Build sed substitutions and in-place edits. The result stays on this page.

Generate netplan YAML for static IP, bonds, VLANs. The result stays on this page.

Paste any command and get each flag explained. The result stays on this page.

Generate a robust bash script skeleton (set -euo, args, logging). The result stays on this page.

jq Query Builder & Tester. Build and test jq filters on JSON. The result stays on this page.

Tests regular expressions against sample text with highlights. The result stays on this page.

Calculates usable capacity and fault tolerance for RAID levels. The result stays on this page.

Build pvcreate/vgcreate/lvcreate/lvextend commands. The result stays on this page.

Recommended swap by RAM and hibernation. The result stays on this page.

Disk Space Unit Converter. Convert GB vs GiB, TB vs TiB. The result stays on this page.

Parse access logs into tables and top lists. The result stays on this page.

Converts epoch timestamps to dates across time zones. The result stays on this page.

Convert maintenance windows across time zones. The result stays on this page.