Linux system errors

Process Killed — the process was terminated by a SIGKILL signal

SIGSEGV signal 11 — the process attempted invalid memory access

Exit code 139 — shell status for a SIGSEGV termination

Input/output error EIO — a read or write operation could not complete

Out of Memory (ENOMEM) — the kernel cannot allocate the requested amount of memory

General Error — a non-specific failure in a command or script

Permission Denied — the process does not have permission to access the resource

Command Not Executable — the file was found but is not executable

Unspecified Error — a general-purpose failure code with no standardized meaning

Shell Misuse — improper use of shell built-ins or syntax

Command Not Found — the specified command or file could not be located

Terminated by User — the process was interrupted by a SIGINT signal

Invalid Exit Argument — script exited with an out-of-range status or terminated by a signal