Notes[1]Out of range exit values can result Make sure correct path is set in $0." } ### Make sure we can connect to server ... true\" = $?" # 1 # Note that the "!" needs a space between it and the command. # !true leads to a "command not found" error # # The '!' This consists of the least significant 8 bits of the status argument that the child specified in a call to exit(3) or _exit(2) or as the argument for a return statement Check This Out

What am I doing wrong? A similar standard for scripting might be appropriate. COMMAND_LAST # Will exit with status of last command. If the exit code is anything other than 0 this indicates failure and the script will echo a failure message to stderr.

Ssh Exit Code 255

If you really wanted something more powerful I'd suggest that you'd switch to an "exit string", instead of a numeric exit code with a wider range. Feb 14 '13 at 23:31 1 It's hard to identify why your script returns 255. For example, exit 3809 gives an exit code of 225 (3809 % 256 = 225).

[2]An update of /usr/include/sysexits.h allocates previously unused exit

You can ssh to that machine and test the script? Do they wish to personify BBC Worldwide? The answer is exit codes, exit codes are important and this article describes how to use them in your scripts and understand them in general. Exit Code -11 Python Within the parenthesis the commands are chained together using the && and || constructs again.

What am I doing wrong? Exit Code 255 Windows The last command executed in the function or script determines the exit status. share|improve this answer edited May 4 '12 at 16:55 answered May 4 '12 at 16:45 MadScientist 1,528816 Nice edit. Why didn't Dumbledore appoint the real Mad Eye Moody to teach Defense Against Dark Arts?

I doubt it. Exit Code 1 Linux The above command will execute the ./ script, and if the exit code is 0 the command echo "bam" will be executed. Ending a script with exit 127 would certainly cause confusion when troubleshooting (is the error code a "command not found" or a user-defined one?). else die verify_bins(){ [ ! -x $GZIP ] && die "File $GZIP does not exists.

Exit Code 255 Windows

This should not cause any problems, since there is no overlap or conflict in usage of exit codes between compiled C/C++ binaries and shell scripts.

PrevHome This variable will print the exit code of the last run command. Ssh Exit Code 255 Negating a condition using !

true # The "true" builtin. Bash Exit Code Check This is Bash's way of giving functions a "return value." [1]

Following the execution of a pipe, a $? gives the exit status of

Actions such as printing to stdout on success and stderr on failure. his comment is here Since exit code 1 signifies so many possible errors, it is not particularly useful in debugging.

There has been an attempt to systematize exit status numbers (see /usr/include/sysexits.h

Reply Link wyrmmage July 16, 2009, 12:02 amSeeing as this is the top hit for googling "ssh return status", I thought I'd go ahead and add thatThe remote command may also On top of those reasons, exit codes exist within your scripts even if you don't define them. SSH client is a program for logging into a remote machine and for executing commands on a remote machine. this contact form One thing I have noticed is sometimes scripts use exit codes and sometimes they don't.

On POSIX systems the standard convention is for the program to pass 0 for successful executions and 1 or higher for failed executions. Exit Code 0 When we execute this script (as a non-root user) the touch command will fail, ideally since the touch command failed we would want the exit code of the script to indicate Or it's merely an ordinary mistake?

With Bash scripts, if the exit code is not specified in the script itself the exit code used will be the exit code of the last command run.

The author of this document proposes restricting user-defined exit codes to the range 64 - 113 (in addition to 0, for success), to conform with the C/C++ standard. Parking lot supervisor more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts You can get a clue what the error code 1 means this if you try: ssh AHOST "sudo yum -y install glibc" You may see: [[email protected] ~]$ ssh MYHOST "sudo yum Exit Code 255 Java Such a condition can be indicated by the following message.

special variable to print the exit code of the script. The author of this document will not do fixups on the scripting examples to conform to the changing standard. Where can I find Boeing 777 safety records? It seems like exit codes are easy for poeple to forget, but they are an incredibly important part of any script.

Why would two species of predator with the same prey cooperate? Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the UNIX is a registered trademark of The Open Group. For example, exit 3809 gives an exit code of 225 (3809 % 256 = 225).

[2]An update of /usr/include/sysexits.h allocates previously unused exit

Thanks for that additional information. –George M May 4 '12 at 17:06 Thank you for your detailed answer! –Eugene S May 4 '12 at 20:15 add a comment| up share|improve this answer answered Mar 18 '16 at 21:59 community wiki Steven the Easily Amused add a comment| Your Answer draft saved draft discarded Sign up or log in Sign Execution: $ ./ Could not create file Providing your own exit code While the above revision will provide an error message if the touch command fails, it still provides a 0 Word for unproportional punishment?