Linux system-errors Error Codes

Process Killed — the process was terminated by a SIGKILL signal

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

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