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What is the meaning of return value 127 from $? in UNIX.
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If the call fails the server writes a message to the server log file describing the call. The events themselves may be failures or successes. Return code 126 is printed when the server cannot execute the script referenced by ALARMPROGRAM.
While trying to use SSH, you may get a response indicating permission is denied. Or if you get an error with a code of 255, it means there's a problem with your SSH connection. The command failed with the exit code: 255.
As per definition exit code 128 means 'invalid exit argument'.
process - 127 Return code from $? - Stack Overflow 127 Return code from $? What is the meaning of return value 127 from $? in UNIX. Value 127 is returned by /bin/sh when the given command is not found within your PATH system variable and it is not a built-in shell command.
Command failed with return code 127 (or 255) You will get the error with SCP protocol, if command necessary for facilitate operation you were trying to do does not exist on remote server or the shell cannot find it. If you are not an experienced Unix user, you should first try using SFTP protocol instead.
In addition to the given answers, note that running a script file with incorrect end-of-line characters could also result in 127 exit code if you use /bin/sh as your shell.
The 127 error code indicates “command not found”. This occurs when any given command within your Bash script or on Bash command line is not found in any of the paths defined by PATH system environment variable. The solution is to make sure that the command your are using can be found within your $PATH.
Value 127 is returned by /bin/sh when the given command is not found within your PATH system variable and it is not a built-in shell command. In other words, the system doesn't understand your command, because it doesn't know where to find the binary you're trying to call.
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