Linux Error Codes
Linux system errors, errno codes, and command-line errors. 180 items found.
Most Popular in Linux Error Codes
linux-errno-1-epermWarning
Linux errno 1 (EPERM) — Operation Not Permitted
linux-errno-2-enoentWarning
Linux errno 2 (ENOENT) — No Such File or Directory
linux-errno-5-eioError
Linux errno 5 (EIO) — Input/Output Error
linux-errno-11-eagainInformational
Linux errno 11 (EAGAIN) — Resource Temporarily Unavailable
linux-errno-12-enomemCritical
Linux errno 12 (ENOMEM) — Out of Memory
linux-errno-13-eaccesWarning
Linux errno 13 (EACCES) — Permission Denied
All Linux Error Codes Items
linux-errno-1-epermWarning
Linux errno 1 (EPERM) — Operation Not Permitted
linux-errno-2-enoentWarning
Linux errno 2 (ENOENT) — No Such File or Directory
linux-errno-5-eioError
Linux errno 5 (EIO) — Input/Output Error
linux-errno-11-eagainInformational
Linux errno 11 (EAGAIN) — Resource Temporarily Unavailable
linux-errno-12-enomemCritical
Linux errno 12 (ENOMEM) — Out of Memory
linux-errno-13-eaccesWarning
Linux errno 13 (EACCES) — Permission Denied
linux-errno-22-einvalWarning
Linux errno 22 (EINVAL) — Invalid Argument
linux-errno-28-enospcError
Linux errno 28 (ENOSPC) — No Space Left on Device
linux-errno-32-epipeInformational
Linux errno 32 (EPIPE) — Broken Pipe
linux-exit-code-127Warning
Linux Exit Code 127 — Command Not Found
linux-exit-code-126Warning
Linux Exit Code 126 — Permission Denied
linux-segmentation-faultError
Linux Segmentation Fault (Signal 11)
linux-killed-signal-9Error
Linux Process Killed (Signal 9)
linux-apt-unmet-dependenciesError
Linux APT Unmet Dependencies
linux-dpkg-error-processingError
Linux dpkg Error Processing Package
linux-grub-unknown-filesystemCritical
Linux GRUB Error Unknown Filesystem
linux-kernel-panicCritical
Linux Kernel Panic — Not Syncing
linux-systemd-failed-to-startWarning
Linux systemd Failed to Start Service
linux-connection-refusedWarning
Linux Connection Refused
linux-connection-timed-outWarning
Linux Connection Timed Out
linux-address-already-in-useWarning
Linux Address Already in Use
linux-read-only-file-systemError
Linux Read-Only File System
linux-no-space-left-on-deviceError
Linux No Space Left on Device
linux-errno-28Critical
Linux Error ENOSPC (errno 28) — No Space Left on Device Fix
linux-errno-111Critical
Linux Error ECONNREFUSED (errno 111) Fix
linux-errno-110Critical
Linux Error ETIMEDOUT (errno 110) — Connection Timed Out Fix
linux-errno-24Critical
Linux Error EMFILE (errno 24) — Too Many Open Files Fix
linux-errno-104Warning
Linux Error ECONNRESET (errno 104) — Connection Reset Fix
linux-errno-14Warning
Linux Error EFAULT (errno 14) — Bad Address Fix
linux-apt-hash-sum-mismatchWarning
Linux APT Hash Sum Mismatch Error Fix
linux-dpkg-lockWarning
Linux dpkg Lock Error — Could Not Get Lock Fix
linux-yum-repo-errorWarning
Linux YUM/DNF Repository Error Fix
linux-grub-rescueCritical
Linux GRUB Rescue — Unknown Filesystem Fix
linux-initramfs-shellCritical
Linux Dropped to initramfs Shell Fix
linux-read-only-filesystemCritical
Linux Read-Only File System Error Fix
linux-input-output-errorCritical
Linux Input/Output Error Fix
linux-no-space-inodeWarning
Linux "No Space Left" But Disk Not Full — Inode Exhaustion Fix
linux-ssh-permission-deniedWarning
Linux SSH Permission Denied (publickey) Fix
linux-port-already-in-useWarning
Linux "Address Already in Use" — Port Conflict Fix
linux-iptables-droppedWarning
Linux iptables Dropping Packets — Firewall Troubleshooting
linux-segfaultCritical
Linux Segmentation Fault (core dumped) Fix
linux-command-not-foundInformational
Linux "Command Not Found" Error Fix
linux-permission-denied-execInformational
Linux Permission Denied — Cannot Execute Script Fix
linux-errno-17-eexistWarning
Linux errno 17 EEXIST — File Exists Error
linux-errno-16-ebusyError
Linux errno 16 EBUSY — Device or Resource Busy
linux-errno-30-erofsError
Linux errno 30 EROFS — Read-Only File System
linux-errno-99-eaddrnotavailError
Linux errno 99 EADDRNOTAVAIL — Cannot Assign Requested Address
linux-bash-syntax-error-unexpected-tokenWarning
Linux Bash Syntax Error Near Unexpected Token
linux-bash-exit-code-1Warning
Linux Bash Exit Code 1 — General Error
linux-bash-exit-code-2Warning
Linux Bash Exit Code 2 — Misuse of Shell Builtin
linux-systemd-service-failedError
Linux systemd Service Failed to Start — Unit Entered Failed State
linux-systemd-dependency-failedError
Linux systemd Dependency Failed — Service Cannot Start
linux-apt-could-not-get-lockError
Linux APT 'Could Not Get Lock' — dpkg Lock Error
linux-apt-broken-packagesError
Linux APT 'Unmet Dependencies — Broken Packages' Error
linux-yum-dnf-no-package-availableWarning
Linux YUM/DNF 'No Package Available' Error
linux-oom-killerCritical
Linux OOM Killer — Out of Memory Process Killed
linux-filesystem-ext4-errorsCritical
Linux EXT4 Filesystem Errors Detected — Requires fsck
linux-ssh-connection-refusedError
Linux SSH Connection Refused — Port 22
linux-network-no-route-to-hostError
Linux 'No Route to Host' Network Error
linux-mount-wrong-fs-typeError
Linux Mount Error — Wrong FS Type, Bad Superblock
linux-errno-1-eperm-deepWarning
Linux EPERM (errno 1) — Operation Not Permitted (Deep Dive)
linux-errno-2-enoent-deepWarning
Linux ENOENT (errno 2) — No Such File or Directory (Deep Dive)
linux-errno-5-eio-deepError
Linux EIO (errno 5) — Input/Output Error (Deep Dive)
linux-errno-6-enxioError
Linux ENXIO (errno 6) — No Such Device or Address
linux-errno-7-e2bigWarning
Linux E2BIG (errno 7) — Argument List Too Long
linux-errno-12-enomem-deepCritical
Linux ENOMEM (errno 12) — Cannot Allocate Memory (Deep Dive)
linux-errno-14-efaultError
Linux EFAULT (errno 14) — Bad Address (Memory Access Error)
linux-errno-23-enfileError
Linux EMFILE/ENFILE (errno 24/23) — Too Many Open Files
linux-errno-28-enospc-deepError
Linux ENOSPC (errno 28) — No Space Left on Device (Deep Dive)
linux-errno-29-espipeInformational
Linux ESPIPE (errno 29) — Illegal Seek on Pipe/Socket
linux-signal-sigsegvError
Linux SIGSEGV — Segmentation Fault Signal Handling & Debugging
linux-signal-sigbusError
Linux SIGBUS — Bus Error Signal (Memory Alignment & Mapping)
linux-signal-sigfpeWarning
Linux SIGFPE — Floating Point Exception (Arithmetic Error)
linux-docker-common-errorsError
Linux Docker Common Errors — Container, Network & Volume Troubleshooting
linux-nginx-error-codesError
Linux Nginx Error Codes — 502, 504, 413 & Upstream Failures
linux-apache-error-codesWarning
Linux Apache Error Codes — AH01630, AH00558 & Module Errors
linux-mysql-error-codesError
Linux MySQL Error Codes — 1045, 2002, 1205 & Common Database Errors
linux-firewall-iptables-ufw-errorsWarning
Linux Firewall Errors — iptables & UFW Troubleshooting
linux-grub-error-minimal-bashCritical
Linux GRUB Rescue — Minimal BASH-like Error & Boot Recovery
linux-systemd-journal-errorsWarning
Linux systemd Journal Errors — Failed Services, Dependencies & Timers
linux-dns-resolution-failuresWarning
Linux DNS Resolution Failures — resolv.conf, systemd-resolved & nsswitch
linux-ssh-key-errorsWarning
Linux SSH Key Errors — Agent Forwarding, Host Key & Permission Denied (publickey)
linux-permission-denied-chmod-chownWarning
Linux Permission Denied — chmod, chown & ACL Troubleshooting Guide
linux-kernel-panic-not-syncingCritical
Linux Kernel Panic — Not Syncing: VFS Unable to Mount Root
linux-swap-and-memory-managementWarning
Linux Swap Errors — Swappiness, Swap Full, and Memory Pressure
linux-ssl-tls-certificate-errorsWarning
Linux SSL/TLS Certificate Errors — Expired, Self-Signed & Chain Issues
linux-errno-9-ebadfWarning
Linux EBADF (errno 9) — Bad File Descriptor
linux-errno-17-eexist-deepInformational
Linux EEXIST (errno 17) — File or Resource Already Exists (Deep Dive)
linux-cron-job-errorsWarning
Linux Cron Job Errors — Not Running, Permission Denied & Environment Issues
linux-package-dependency-hellError
Linux Package Dependency Hell — Broken Packages, Conflicts & Held Back
linux-selinux-permission-deniedError
SELinux Permission Denied — AVC Denied Errors and Troubleshooting
linux-apparmor-profile-errorsWarning
AppArmor Profile Errors — Access Denied and Profile Troubleshooting on Ubuntu
linux-crontab-syntax-errorsWarning
Crontab Syntax Errors — Common Mistakes and Debugging Cron Jobs
linux-xorg-display-errorsError
Xorg Display Errors — X Server Crashes, Black Screen, and Resolution Issues
linux-wayland-display-errorsWarning
Wayland Display Errors — Screen Sharing, Scaling, and Application Compatibility
linux-grub-rescue-detailedCritical
GRUB Rescue — Detailed Recovery from grub rescue> Prompt
linux-systemctl-service-errorsError
Systemctl Service Errors — Failed to Start, Dependency, and Unit File Issues
linux-journalctl-usage-guideInformational
Journalctl Usage Guide — Reading System Logs and Debugging Services
linux-lvm-errors-guideError
LVM Errors — Logical Volume Manager Troubleshooting Guide
linux-raid-errors-mdadmCritical
Linux RAID Errors — mdadm Degraded Array and Disk Failure Recovery
linux-nfs-mount-errorsError
NFS Mount Errors — Permission Denied, Stale Handle, and Connection Issues
linux-smb-samba-errorsWarning
Samba/SMB Errors — Windows File Sharing from Linux Troubleshooting
linux-postfix-mail-errorsError
Postfix Mail Errors — Email Delivery Failures and Queue Troubleshooting
linux-docker-container-errors-detailedError
Docker Container Errors — Exit Codes, OOMKilled, and Networking Issues
linux-nginx-common-errorsError
Nginx Common Errors — Configuration Test Failed and Upstream Timeout
linux-ssh-key-permission-errorsWarning
SSH Key Permission Errors — Too Open Permissions and Key Authentication Failures
linux-firewall-ufw-guideWarning
UFW Firewall Errors — Rules Not Working and Port Configuration Guide
linux-swap-space-errorsError
Linux Swap Space Errors — Swap Full, OOM Killer, and Swap Configuration
linux-ssl-certificate-errors-detailedError
Linux SSL/TLS Certificate Errors — Let's Encrypt, Chain, and Renewal Troubleshooting
linux-disk-io-performance-errorsWarning
Linux Disk I/O Performance Errors — High iowait, Slow Disk, and Diagnostics
linux-systemd-timer-errorsWarning
Systemd Timer Errors — Replacing Cron with Systemd Timers and Troubleshooting
linux-apt-key-deprecation-errorsInformational
APT Key Deprecation Errors — apt-key Is Deprecated Fix for Ubuntu/Debian
linux-container-permission-namespaceWarning
Linux Container Permission Errors — User Namespaces and Rootless Containers
linux-dns-troubleshooting-detailedWarning
Linux DNS Troubleshooting — systemd-resolved, /etc/resolv.conf, and DNS Debugging
linux-kubernetes-pod-crashloopbackoffError
Kubernetes CrashLoopBackOff — Pod Restart Loop and Container Crash Debugging
linux-kubernetes-pod-imagepullbackoffError
Kubernetes ImagePullBackOff — Container Image Download and Registry Errors
linux-docker-compose-network-errorWarning
Docker Compose Network Errors — Container Communication and DNS Resolution Failures
linux-nginx-502-bad-gatewayError
Nginx 502 Bad Gateway — Upstream Server Connection and Proxy Errors
linux-nginx-504-gateway-timeoutError
Nginx 504 Gateway Timeout — Slow Upstream Response and Timeout Configuration
linux-apache-mod-rewrite-errorsWarning
Apache mod_rewrite Errors — URL Rewriting, .htaccess, and Redirect Loop Issues
linux-letsencrypt-renewal-errorError
Let's Encrypt Certificate Renewal Error — Certbot and SSL Auto-Renewal Failures
linux-reverse-proxy-errorsWarning
Reverse Proxy Errors — SSL Termination, Header Forwarding, and Backend Connection Issues
linux-postgresql-common-errorsWarning
PostgreSQL Common Errors — Connection Refused, Authentication, and Query Failures
linux-redis-connection-errorsWarning
Redis Connection Errors — Server Connection Refused and Memory Limit Issues
linux-mongodb-connection-errorsWarning
MongoDB Connection Errors — Authentication Failed and Connection String Issues
linux-ansible-playbook-errorsWarning
Ansible Playbook Errors — Task Failures, SSH Connectivity, and Variable Resolution Issues
linux-terraform-errorsWarning
Terraform Errors — Plan, Apply, and State Management Failures
linux-github-actions-runner-errorsWarning
GitHub Actions Runner Errors — Workflow Failures and Self-Hosted Runner Issues
linux-logrotate-errorsInformational
Logrotate Errors — Log Rotation Configuration and Permission Failures on Linux
linux-rsync-errors-permission-deniedWarning
rsync Errors — Permission Denied, Connection Failed, and Partial Transfer Fixes
linux-tar-archive-errorsInformational
tar Archive Errors — Extraction Failures, Corrupted Archives, and Permission Issues
linux-environment-variables-path-issuesInformational
Environment Variables and PATH Issues — Command Not Found and Configuration on Linux
linux-locale-errorsInformational
Locale Errors — Cannot Set LC_ALL and Character Encoding Issues on Linux
linux-fail2ban-configuration-errorsWarning
Fail2Ban Configuration Errors — SSH Brute Force Protection and Ban Issues on Linux
linux-screen-tmux-session-errorsInformational
Screen and tmux Session Errors — Terminal Multiplexer Attachment and Detach Issues
linux-ci-cd-pipeline-errorsWarning
CI/CD Pipeline Errors — Build, Test, and Deployment Failures in Continuous Integration
linux-aws-cli-credentials-not-foundError
AWS CLI Credentials Not Found — Unable to Locate Credentials Error
linux-terraform-state-lock-errorError
Terraform State Lock Error — State File Locked by Another Process
linux-helm-chart-install-failedError
Helm Chart Install Failed — Kubernetes Helm Release Deployment Errors
linux-argocd-sync-failed-out-of-syncError
ArgoCD Sync Failed — Application Out of Sync and Health Degraded
linux-prometheus-scrape-target-downWarning
Prometheus Scrape Target Down — Metrics Endpoint Unreachable or Timeout
linux-grafana-no-data-dashboardWarning
Grafana Dashboard No Data — Data Source Connection and Query Errors
linux-elk-elasticsearch-cluster-red-statusCritical
Elasticsearch Cluster Red Status — Unassigned Shards and Data Loss Risk
linux-iptables-rules-not-persisting-rebootWarning
iptables Rules Not Persisting After Reboot — Firewall Configuration Lost
linux-wireguard-vpn-handshake-timeoutError
WireGuard VPN Handshake Timeout — Peer Connection Failure and No Traffic
linux-dns-over-tls-resolution-failureWarning
DNS-over-TLS Resolution Failure — Secure DNS Queries Not Working on Linux
linux-ssh-too-many-authentication-failuresWarning
SSH Too Many Authentication Failures — Connection Rejected After Key Attempts
linux-gpg-key-expired-cannot-verifyWarning
GPG Key Expired — Package Signature Verification and Key Management Errors
linux-ssl-certificate-chain-incompleteError
SSL Certificate Chain Incomplete — Intermediate Certificate Missing on Linux Server
linux-makefile-missing-separator-errorInformational
Makefile Missing Separator Error — Tab vs Spaces Indentation Issue
linux-systemd-service-failed-to-startError
systemd Service Failed to Start — Unit Activation Error and Debugging
linux-perf-tool-no-permission-deniedInformational
Linux perf Tool Permission Denied — Performance Counter Access Restricted
linux-strace-permission-denied-ptraceInformational
strace Permission Denied — ptrace Scope Restricted for Process Tracing
linux-memory-leak-oom-killerCritical
Linux OOM Killer Terminated Process — Out of Memory and Memory Leak Detection
linux-cpu-throttling-thermal-performanceWarning
Linux CPU Thermal Throttling — Performance Drops Due to Overheating
linux-docker-no-space-left-on-deviceError
Docker No Space Left on Device — Disk Full from Images, Volumes, and Build Cache
linux-container-cgroup-memory-limitError
Container Killed by cgroup Memory Limit — OOMKilled in Kubernetes and Docker
linux-apt-unmet-dependencies-broken-packagesError
apt Unmet Dependencies — Broken Packages and Dependency Resolution Failures
linux-chmod-permission-denied-scriptInformational
chmod Permission Denied on Script — Making Shell Scripts Executable on Linux
linux-bash-command-not-found-pathInformational
bash: command not found — PATH Environment Variable and Binary Location Issues
linux-git-merge-conflict-resolutionWarning
Git Merge Conflict — Resolving File Conflicts During Merge, Rebase, and Cherry-Pick
linux-npm-eacces-permission-error-globalWarning
npm EACCES Permission Error — Global Package Install Permission Denied
linux-errno-38-enosys-function-not-implementedWarning
Linux errno 38 ENOSYS Function Not Implemented — What It Means & How to Fix It
linux-errno-36-enametoolongInformational
Linux errno 36 ENAMETOOLONG File Name Too Long — What It Means & How to Fix It
linux-containerd-runtime-error-ociError
Linux containerd OCI Runtime Error — What It Means & How to Fix It
linux-xfs-metadata-corruption-repairCritical
Linux XFS Metadata Corruption Repair — What It Means & How to Fix It
linux-pip-externally-managed-environmentInformational
Linux pip Externally Managed Environment Error — What It Means & How to Fix It
linux-btrfs-balance-no-spaceError
Linux Btrfs Balance No Space Left Error — What It Means & How to Fix It
linux-coredump-segfault-analysisError
Linux Core Dump Segfault Analysis Guide — What It Means & How to Fix It
linux-zfs-pool-degraded-resilverCritical
Linux ZFS Pool Degraded Resilver — What It Means & How to Fix It
linux-flatpak-permission-denied-portalWarning
Linux Flatpak Permission Denied Portal Error — What It Means & How to Fix It
linux-nm-wifi-authentication-failedWarning
Linux NetworkManager Wi-Fi Authentication Failed — What It Means & How to Fix It
linux-snap-refresh-in-progress-lockInformational
Linux Snap Refresh In Progress Lock Error — What It Means & How to Fix It
linux-journald-disk-space-exhaustedError
Linux journald Disk Space Exhausted — What It Means & How to Fix It
linux-errno-40-eloop-symlink-loopWarning
Linux errno 40 ELOOP Too Many Symbolic Links — What It Means & How to Fix It
linux-kernel-taint-proprietary-moduleInformational
Linux Kernel Tainted Proprietary Module — What It Means & How to Fix It
linux-nftables-connection-tracking-table-fullError
Linux nftables Connection Tracking Table Full — What It Means & How to Fix It
linux-grub-error-file-not-foundCritical
Linux GRUB Error File Not Found — What It Means & How to Fix It
linux-podman-rootless-uid-mappingWarning
Linux Podman Rootless UID Mapping Error — What It Means & How to Fix It
linux-errno-16-ebusy-device-or-resource-busy-detailedWarning