Troubleshooting — Docs

Fixing "Too Many Open Files" Error
Practical guide to open-files featuring real-world examples, performance tuning tips, and security best practices. 96 views
Fixing "No Space Left on Device" When Disk Has Space
A comprehensive guide to inodes covering installation, configuration, and optimization for Linux VPS environments. 99 views
Resolving Kernel Panic and System Crashes
A comprehensive guide to kernel-panic covering installation, configuration, and optimization for Linux VPS environments. 104 views
Troubleshooting SSH Connection Refused Errors
Step-by-step tutorial for ssh on Ubuntu/Debian servers, with practical code examples and troubleshooting tips. 98 views
Troubleshooting Time Sync Issues on VPS
Practical guide to time-sync featuring real-world examples, performance tuning tips, and security best practices. 104 views
Fix Read-Only Filesystem Errors on Linux
Fix read-only filesystem errors by diagnosing disk issues, running filesystem checks, recovering from rescue mode, and preventing recurrence. 433 views
Troubleshoot High Swap Usage and Thrashing
Diagnose and fix high swap usage and thrashing by identifying memory hogs, tuning swappiness, right-sizing services, and optimizing memory allocation. 611 views
Debug Memory Leaks in Node.js Applications
Debug Node.js memory leaks with heap snapshots, Chrome DevTools analysis, common leak patterns, LRU caching, and production monitoring. 489 views
Fix PostgreSQL Too Many Connections Error
Fix PostgreSQL "too many connections" errors with connection analysis, PgBouncer pooling, application pool configuration, and monitoring. 537 views
Troubleshoot Let's Encrypt Certificate Renewal Failures
Fix Let's Encrypt renewal failures caused by port issues, DNS problems, rate limits, configuration errors, and missing reload hooks. 465 views
Fix No Space Left on Device Caused by Journal Logs
Learn to fix "no space left on device" errors caused by systemd journal logs, deleted-but-open files, inodes, and hidden disk usage on Linux servers. 286 views
Diagnose Network Packet Loss on Your Server
Diagnose and fix network packet loss using MTR, tcpdump, NIC statistics, and kernel tuning for reliable server connectivity. 488 views
Troubleshoot Slow SSH Connections
Fix slow SSH login and connection delays caused by DNS lookups, GSSAPI, UseDNS, and network configuration issues. 530 views
Fix APT Hash Sum Mismatch Errors
Resolve APT hash sum mismatch errors caused by mirror inconsistencies, proxy caching, and corrupted package lists on Debian/Ubuntu. 442 views
Debug 502 Bad Gateway Errors Systematically
Systematically debug 502 Bad Gateway errors by checking upstream backends, Nginx proxy settings, PHP-FPM, and application crashes. 632 views
Troubleshoot Docker Container Networking Issues
Troubleshoot Docker container networking with DNS, inter-container communication, published ports, compose networking, and MTU debugging. 335 views
Fix No Route to Host Errors
Fix "No route to host" errors by checking routing tables, interface status, firewall REJECT rules, ARP resolution, and network path tracing. 395 views
Diagnose Intermittent Server Unreachability
Diagnose intermittent server unreachability with continuous monitoring, conntrack analysis, NIC error checking, and network stack tuning. 374 views
Fix Corrupted Package Manager Databases
Repair corrupted APT, dpkg, DNF, and RPM databases with lock file cleanup, database rebuilds, broken package fixes, and half-installed package recovery. 531 views
Troubleshoot Nginx 499 Client Closed Request Errors
Troubleshoot Nginx 499 Client Closed Request errors by identifying slow backends, adjusting timeouts, and optimizing proxy configuration. 301 views
Diagnose Connection Timed Out vs Connection Refused Errors
Systematically diagnose Connection Timed Out vs Connection Refused errors with step-by-step troubleshooting for services, firewalls, and networking. 709 views
Fix Kernel Panic Errors on Linux
Diagnose and fix Linux kernel panic errors including filesystem corruption, OOM kills, hardware failures, and kernel module issues with recovery procedures. 377 views
Troubleshoot systemd Service Failures
Systematically troubleshoot systemd service failures with log analysis, configuration validation, permission fixes, and dependency debugging. 580 views
Debug Segmentation Fault Errors on Linux
Debug segmentation fault errors on Linux with core dump analysis, GDB backtracing, library verification, and memory diagnostics. 373 views
Fix Slow DNS Resolution on Linux Servers
Fix slow DNS resolution on Linux with cache configuration, IPv6 timeout fixes, resolver optimization, and local DNS caching with dnsmasq. 506 views
Diagnosing Slow Server Response Times
A comprehensive guide to slow covering installation, configuration, and optimization for Linux VPS environments. 128 views
How to Fix Permission Denied Errors on Linux 131 views
How to Troubleshoot High CPU Usage on Linux 118 views
How to Fix Disk Full Errors When Disk Isn't Full (Inodes) 114 views
How to Recover from a Failed Kernel Update 112 views
How to Troubleshoot SSH Connection Timeouts 129 views
How to Debug systemd Service Failures 116 views
How to Fix Broken Package Dependencies on Ubuntu 134 views
How to Fix PHP-FPM Server Reached pm.max_children Setting
Fixing PHP-FPM pm.max_children Errors When your Breeze logs show "server reached pm.max_children setting," PHP-FPM has exhausted its worker pool and cannot h... 123 views
How to Fix SSH Broken Pipe Disconnections
Fixing SSH Broken Pipe Disconnections Frequent "broken pipe" errors or unexpected SSH disconnections to your Breeze are usually caused by idle connection tim... 116 views
How to Fix Redis MISCONF Error
Fixing the Redis MISCONF Error The Redis MISCONF error -- "Redis is configured to save RDB snapshots, but it is currently not able to persist on disk" -- occ... 126 views
How to Fix No Space Left on Device When Disk Shows Free Space
Fixing "No Space Left on Device" When Disk Shows Free Space Seeing "No space left on device" errors on your Breeze when df shows available space is a common ... 129 views
How to Fix System Clock Synchronization Issues on Linux
Fixing System Clock Synchronization Issues on Linux An out-of-sync system clock on your Breeze causes certificate validation failures, authentication errors,... 121 views
How to Fix Node.js ENOMEM Out of Memory Errors
Fixing Node.js ENOMEM Out of Memory Errors Node.js applications crashing with ENOMEM or "JavaScript heap out of memory" errors on your Breeze indicate the pr... 115 views
How to Fix Unable to Lock the Administration Directory Error
Fixing "Unable to Lock the Administration Directory" Error The error "Could not get lock /var/lib/dpkg/lock-frontend" or "Unable to lock the administration d... 117 views
How to Fix Nginx 413 Request Entity Too Large Error
What Causes This Error?The Nginx 413 error occurs when a client sends a request body that exceeds the client_max_body_size directive. This commonly happens d... 134 views
How to Fix MySQL Too Many Connections Error
What Causes This Error?MySQL returns "Too many connections" when the number of simultaneous client connections reaches the max_connections limit. The default... 117 views
How to Fix Cannot Allocate Memory Errors on Linux
What Causes This Error?The "Cannot allocate memory" error (errno 12, ENOMEM) occurs when the system cannot satisfy a memory allocation request. This can happ... 116 views
How to Fix Docker No Space Left on Device Error
What Causes This Error?Docker can consume significant disk space through images, containers, volumes, and build cache. The "no space left on device" error me... 116 views
How to Fix SSL Certificate Chain Issues
What Are Chain Issues?SSL certificate chain issues occur when a web server does not present the full chain of certificates from the server certificate up to ... 116 views
How to Fix High iowait on Linux
What Is iowait?The iowait metric represents the percentage of time CPUs spend idle while waiting for disk I/O operations to complete. High iowait (consistent... 115 views
How to Fix Docker Container Restart Loops
What Is a Restart Loop?A Docker container stuck in a restart loop continuously crashes and restarts, often cycling through "Restarting" status. This is typic... 139 views
Fixing Broken Package Dependencies on Ubuntu 133 views
Resolving SSH Key Authentication Failures 250 views
Why Is My Website Showing a 502 Bad Gateway Error? 289 views
Resolving "Too Many Open Files" Errors 236 views
Debugging PHP Errors on Your VPS 163 views
Diagnosing High CPU Usage on Your VPS 303 views
Fixing "Connection Refused" Errors 251 views
Recovering from a Full Disk on Linux 301 views
What to Do When Your Server Is Unreachable 131 views
Resolving High Load Average Issues 128 views
Troubleshooting SSL Certificate Errors 121 views
Debugging Slow Website Performance 127 views
Fixing Permission Denied Errors on Linux 132 views
Debugging Memory Issues and OOM Kills 121 views
Recovering from a Broken Package Manager 115 views
Diagnosing High CPU Usage on Linux 128 views
Fixing Disk Full Errors 112 views
Resolving SSH Connection Problems 116 views
Cannot Connect via SSH: Troubleshooting Guide
If you can't connect to your Breeze via SSH, work through these steps.1. Check Server StatusVerify your Breeze is "active" in the portal. If it's stopped or sus... 369 views
Server Is Running Out of Disk Space
A full disk can cause applications to crash and the system to become unstable.Check Disk Usagedf -hFind Large Filesdu -h --max-depth=1 / | sort -rh | head -20Co... 415 views
Server Is Slow or Unresponsive
Diagnose and fix poor server performance.Check System Loaduptime topCheck Memoryfree -hIf "available" memory is very low, you may need more RAM or should invest... 394 views
How to Fix "Permission Denied" Errors
Permission errors are among the most common Linux issues. Here's how to diagnose and fix them.Check File Permissionsls -la /path/to/fileCommon Fixes# Web files ... 223 views
How to Fix "Connection Refused" Errors
A "Connection refused" error means the service isn't running or the port is blocked.1. Check If the Service Is Runningsystemctl status nginx systemctl status my... 425 views
How to Fix "Address Already in Use" Errors
This error occurs when a port is already occupied by another process.Find What's Using the Portss -tulnp | grep :80 lsof -i :80SolutionsStop the conflicting ser... 515 views
How to Diagnose High CPU Usage
Identify which processes are consuming CPU resources.Find CPU-Heavy Processestop -c # Press P to sort by CPUDetailed Process Infops aux --sort=-%cpu | head -20P... 329 views
How to Recover from a Full Disk
When your disk hits 100%, many things break. Here's how to recover.Emergency Cleanup# Clear systemd journal journalctl --vacuum-size=50M # Clear apt cache apt c... 556 views
How to Fix DNS Resolution Issues
If your server can't resolve domain names, network requests will fail.Test DNS Resolutiondig google.com nslookup google.com ping google.comCheck DNS Configurati... 548 views
How to Check If Your Server Has Been Compromised
Signs your server may have been hacked and what to do about it.Warning SignsUnexpected high CPU or network usageUnknown processes runningModified system filesNe... 421 views
How to Fix "Too Many Open Files" Error
This error means your server has hit the file descriptor limit.Check Current Limitsulimit -n\ncat /proc/sys/fs/file-nrIncrease for a ServiceEdit the systemd ser... 458 views
How to Fix Package Manager Lock Errors
Errors like "Could not get lock /var/lib/dpkg/lock" mean another process is using the package manager.Check for Running Processesps aux | grep -E "apt|dpkg"Wait... 485 views
How to Fix SSH "Host Key Verification Failed"
This error occurs when the server's SSH host key doesn't match what your client has stored.Why It HappensYou rebuilt your Breeze (new OS = new host keys)The ser... 514 views
MySQL Service Won't Start: Troubleshooting
Common reasons MySQL fails to start and how to fix them.Check Error Logjournalctl -u mysql --no-pager -n 50\ntail -50 /var/log/mysql/error.logCommon CausesDisk ... 582 views
Resolving Disk I/O Bottlenecks
Learn how to set up and configure disk-io on your VPS with step-by-step instructions, including bottleneck and best practices for production environments. 106 views
Fixing Broken Grub Bootloader on Linux
Practical guide to grub featuring real-world examples, performance tuning tips, and security best practices. 93 views
Fixing Package Manager Lock and Dependency Issues
Learn how to set up and configure apt on your VPS with step-by-step instructions, including dpkg and best practices for production environments. 99 views
Troubleshooting Docker Container Networking Issues
Practical guide to docker featuring real-world examples, performance tuning tips, and security best practices. 96 views
Troubleshooting Nginx 502 Bad Gateway Errors
Everything you need to know about nginx for your VPS, from initial setup to production-ready configuration with 502. 99 views
Diagnosing Network Connectivity Problems
Practical guide to network featuring real-world examples, performance tuning tips, and security best practices. 93 views
Resolving MySQL "Too Many Connections" Error
Everything you need to know about mysql for your VPS, from initial setup to production-ready configuration with connections. 88 views
Fixing Permission Denied Errors in Linux
Practical guide to permission featuring real-world examples, performance tuning tips, and security best practices. 88 views
Fixing Zombie and Orphan Processes
Step-by-step tutorial for zombie on Ubuntu/Debian servers, with practical code examples and troubleshooting tips. 94 views
Fixing "Too Many Open Files" Errors
Linux limits how many files (including sockets and pipes) a process can open simultaneously. When this limit is reached, you see: 255 views
Debugging Memory Leaks in Linux Applications
A comprehensive guide to memory-leaks covering installation, configuration, and optimization for Linux VPS environments. 96 views
Diagnosing High CPU Usage on Linux Servers
Everything you need to know about cpu for your VPS, from initial setup to production-ready configuration with high-usage. 96 views