Other Troubleshooting Guides
Other errors can surface at the worst possible moments — during deployments, under peak traffic, or in the middle of critical operations. This collection of 2 troubleshooting guides covers the most common Other issues encountered in Linux server administration and system operations. Each article walks through specific error messages with step-by-step diagnosis, root cause analysis, and verified solutions. Whether you're dealing with configuration problems, authentication failures, timeout errors, or unexpected behavior, these guides are designed to get you from error message to resolution as quickly as possible. Solutions are backed by official documentation and real-world production experience.
Error Quick Reference
| Article | Description |
|---|---|
| Resolving 'Connection Refused TCP 127.0.0.1:6379' and Extending LVM Storage in RHEL 7/8 | Fix Redis connection refused tcp 127.0.0.1:6379 errors caused by out-of-memory or full disks. Learn to use lvextend and vgextend in RHEL 7/8 to expand storage. |
| Ultimate Linux Troubleshooting Guide: Fixing 'Permission Denied', 'Connection Refused', '502 Bad Gateway', and 'OOM Killer' | Comprehensive SRE guide to resolving common Linux system errors: permission denied, port 22 connection refused, 502 Bad Gateway across stacks, and Linux OOM. |
Most Common Other Errors
Resolving 'Connection Refused TCP 127.0.0.1:6379' and Extending LVM Storage in RHEL 7/8
Fix Redis connection refused tcp 127.0.0.1:6379 errors caused by out-of-memory or full disks. Learn to use lvextend and vgextend in RHEL 7/8 to expand storage.
Ultimate Linux Troubleshooting Guide: Fixing 'Permission Denied', 'Connection Refused', '502 Bad Gateway', and 'OOM Killer'
Comprehensive SRE guide to resolving common Linux system errors: permission denied, port 22 connection refused, 502 Bad Gateway across stacks, and Linux OOM.
All Other Guides2 guides
Resolving 'Connection Refused TCP 127.0.0.1:6379' and Extending LVM Storage in RHEL 7/8
Fix Redis connection refused tcp 127.0.0.1:6379 errors caused by out-of-memory or full disks. Learn to use lvextend and vgextend in RHEL 7/8 to expand storage.
Ultimate Linux Troubleshooting Guide: Fixing 'Permission Denied', 'Connection Refused', '502 Bad Gateway', and 'OOM Killer'
Comprehensive SRE guide to resolving common Linux system errors: permission denied, port 22 connection refused, 502 Bad Gateway across stacks, and Linux OOM.