SYS
System desk
Users, processes, disks, and logs. These utilities run in the browser and explain the unglamorous work that keeps hosts honest.
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Chmod Calculator
LiveConvert between symbolic and numeric Linux file permissions, including special bits.
Open tooluseradd Command Builder
LiveBuild useradd commands with home directory, shell, groups, and expiry options.
Open toolSSH Key Generator
LiveGenerate SSH key pairs in browser (Ed25519/RSA). The result stays on this page.
Open toolCron Expression Generator & Explainer
LiveBuilds cron expressions and explains them in plain English. The result stays on this page.
Open toolCron Next Run Calculator
LiveList the next N run times of a cron expression. The result stays on this page.
Open toolsystemd Unit File Generator
LiveGenerates .service and .timer unit files from a form. The result stays on this page.
Open tooljournalctl Command Builder
LiveBuild journalctl filters by unit, time, priority. The result stays on this page.
Open toolfind Command Builder
LiveBuilds find commands with filters for name, size, time, permissions. The result stays on this page.
Open tooltar Command Builder
LiveBuilds tar create/extract/list commands with compression options. The result stays on this page.
Open toolrsync Command Builder
LiveBuilds rsync commands for local/remote sync and backups. The result stays on this page.
Open toolgrep Command Builder
LiveBuild grep/egrep commands with common flags. The result stays on this page.
Open toolsed Command Builder
LiveBuild sed substitutions and in-place edits. The result stays on this page.
Open toolnetplan Config Generator
LiveGenerate netplan YAML for static IP, bonds, VLANs. The result stays on this page.
Open toolLinux Command Explainer
LivePaste any command and get each flag explained. The result stays on this page.
Open toolBash Script Template Generator
LiveGenerate a robust bash script skeleton (set -euo, args, logging). The result stays on this page.
Open tooljq Query Builder & Tester
Livejq Query Builder & Tester. Build and test jq filters on JSON. The result stays on this page.
Open toolRegex Tester
LiveTests regular expressions against sample text with highlights. The result stays on this page.
Open toolRAID Calculator
LiveCalculates usable capacity and fault tolerance for RAID levels. The result stays on this page.
Open toolLVM Command Builder
LiveBuild pvcreate/vgcreate/lvcreate/lvextend commands. The result stays on this page.
Open toolSwap Size Calculator
LiveRecommended swap by RAM and hibernation. The result stays on this page.
Open toolDisk Space Unit Converter
LiveDisk Space Unit Converter. Convert GB vs GiB, TB vs TiB. The result stays on this page.
Open toolApache/Nginx Access Log Parser
LiveParse access logs into tables and top lists. The result stays on this page.
Open toolUnix Timestamp Converter
LiveConverts epoch timestamps to dates across time zones. The result stays on this page.
Open toolTime Zone Converter for Admins
LiveConvert maintenance windows across time zones. The result stays on this page.
Open toolGuides
Pillar guides for this desk. Published supporting pages are linked from the pillar they belong to.
Linux Users & Permissions
Scheduling & Job Automation
systemd & Services
Linux Command Builders
Shell Scripting & Text Processing
Storage, Filesystems & RAID
Linux Performance & Troubleshooting
Logs & Time
Windows Server & PowerShell
Active Directory & Identity
Group Policy & Windows Security
Web Servers & Hosting
Virtualization
Backup & Recovery
Mail Server Administration
Package & Patch Management
Server Hardware & Sizing
Developer & Data Utilities
Reference & Lookup
Windows Server Roles
macOS Administration
Provisioning & Config Management
Career & Certification
Linux Distro Guides
- Ubuntu Server Administration Guide
- Debian Server Administration Guide
- RHEL Server Administration Guide
- Rocky Linux Server Administration Guide
- AlmaLinux Server Administration Guide
- CentOS Stream Server Administration Guide
- Fedora Server Administration Guide
- openSUSE / SLES Server Administration Guide
- Arch Linux Server Administration Guide
- Alpine Linux Server Administration Guide
- Amazon Linux 2023 Server Administration Guide
- Oracle Linux Server Administration Guide
- Raspberry Pi OS Server Administration Guide