Steven Rosales

Support Command Toolbox

---

Toolbox Sections

Shell Scripting

• Shell Scripting for DevOps

Focus areas:

• Bash script structure
• Variables and arguments
• Conditions and loops
• Functions
• Input/output redirection
• Pipes
• Logging patterns
• DevOps script examples

---

Linux Troubleshooting

• Linux Troubleshooting Commands for DevOps and Support

Focus areas:

• System information
• CPU troubleshooting
• Memory troubleshooting
• Disk usage
• Storage and partitions
• Services
• Logs and journalctl
• Network interfaces
• Connectivity testing
• DNS troubleshooting
• Ports and listening services
• Firewall checks
• Permissions and ownership
• SSH troubleshooting
• Real troubleshooting scenarios

---

Kubernetes Troubleshooting

• Kubernetes Troubleshooting Commands for DevOps and Support

Focus areas:

• Cluster context and namespaces
• Daily kubectl productivity setup
• Kubeconfig management
• Aliases and autocomplete
• Nodes
• Pods
• Logs
• Events
• Deployments
• Services
• Endpoints
• Ingress
• ConfigMaps and Secrets
• Certificates and TLS secrets
• Persistent volumes and claims
• Rollouts and rollbacks
• Common Kubernetes issues
• Real troubleshooting scenarios

---

Planned Sections

These sections will be added next:

• Docker Commands
• Networking Troubleshooting Commands
• Log Debugging Commands
• AWS CLI Commands
• Azure CLI Commands
• Incident Response Runbooks

---

Recommended Troubleshooting Approach

A strong troubleshooting process should follow this logic:

1. Confirm the issue.
2. Confirm the impact.
3. Identify what changed.
4. Check system health.
5. Review logs.
6. Test connectivity.
7. Isolate the failing layer.
8. Apply the safest fix.
9. Validate recovery.
10. Document the root cause.

---