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remote-system-maintenance

This skill should be used when performing maintenance or diagnostics on remote Linux systems. Triggers on "remote server", "Linux maintenance", "Ubuntu cleanup", "Debian", "disk space", "apt cleanup", "journal vacuum", "snap cleanup", "system diagnostics". Provides structured three-phase checklists with quantification.

aiskillstore/marketplace

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SKILL.md3.1 KB
skill-report.json14.3 KB

SKILL.md（原文）

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Remote System Maintenance

Purpose

Structured guidance for diagnosing and maintaining remote Linux systems through SSH/tmux sessions, with emphasis on Ubuntu/Debian platforms.

Applicable Scenarios

System maintenance tasks
Disk space recovery
Package updates
Health diagnostics
Cleanup operations on remote servers

Three-Phase Approach

Phase 1: Initial Diagnostics

Capture baseline system state:

Hostname and system identification
Resource utilization (disk, memory, CPU)
Process status and load
Zombie process detection

Phase 2: System Log Review

Examine system health indicators:

Recent error messages in system logs
Journal disk consumption analysis
Critical service status
Authentication and security events

Phase 3: Package Assessment

Identify maintenance opportunities:

Upgradable packages
Orphaned configurations
Unused dependencies
Package cache size

Ubuntu/Debian Cleanup Sequence

Execute these seven stages in order:

Package Cache Refresh - apt update to sync package lists
System Upgrades - apt upgrade for security and bug fixes
Orphan Removal - apt autoremove to clean unused dependencies
Cache Purging - apt clean to reclaim package cache space
Journal Pruning - journalctl --vacuum-time=7d to limit log retention
Snap Revision Cleanup - Remove disabled snap revisions (see below)
Temporary Directory Assessment - Review /tmp and /var/tmp for cleanup opportunities

Snap Revision Cleanup Technique

Snap keeps old revisions by default. To identify and remove:

# List all disabled snap revisions
snap list --all | awk '/disabled/{print $1, $3}'

# Remove specific revision
snap remove <package-name> --revision=<revision-number>

Important: Requires explicit removal by revision number, not simple package uninstallation.

Documentation Requirements

All maintenance sessions must generate structured logs recording:

System Identification
- Hostname
- OS version
- Kernel information
- Operator identity
Resource States
- Initial disk/memory/CPU usage
- Final disk/memory/CPU usage
- Quantified improvements
Actions Taken
- Specific commands executed
- MB/GB freed per category
- Packages upgraded/removed
Follow-up Recommendations
- Remaining issues
- Future maintenance needs
- Monitoring suggestions

Expected Results

Real-world recovery examples:

Journal vacuuming: 300-600 MB
Snap revision cleanup: 500 MB to 2 GB
Package cache purging: 100-500 MB
Total potential: 2+ GB in comprehensive sessions

Time Commitment

Typical maintenance session: 15-30 minutes including diagnostics, cleanup, and documentation.

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