Convention exit status code program posix unix linux shell

Voir :

Exit status :

0: Success—Indicates that the command or program executed successfully without any errors.
1: General Error—A catch-all exit code for a variety of general errors. Often used when the command or program encounters an error, but no specific exit code is available for the situation.
2: Misuse of shell built-ins—Indicates incorrect usage of shell built-in commands or misuse of shell syntax.
126: Command cannot execute—The command was found, but it could not be executed, possibly due to insufficient permissions or other issues.
127: Command not found—The command was not found in the system's PATH, indicating that either the command does not exist or the PATH variable is incorrectly set.
128: Invalid exit argument—Returned when a script exits with an invalid argument. This usually indicates an error in the script itself.
128 + N: Fatal error signal N—Indicates that the command or program was terminated by a fatal error signal. For example, an exit code of 137 (128 + 9) means that the command was terminated by a SIGKILL signal.
130: Script terminated by Control-C—Indicates that the command or script was terminated by the user using Control-C (SIGINT signal).
255: Exit status out of range—Returned when the exit status is outside the valid range (0 to 254)