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I had a script which was running fine but when I ran it today, it says declare: not found. I am using bash shell and path at the starting of the script is correct.

Two flagged lines in my script are as follows:

declare -a RESPONSE

It also says ( is unexpected but I guess that is coming up because of the first error. Worth mentioning point is when I type in declare directly works fine.

declare | grep USER shows


So, whats wrong here?

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3 Answers

up vote 4 down vote accepted

Are you using sh instead of bash? sh (linked to dash) does not support declare keyword, nor the syntax


for initializing arrays.

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My shebang line is #!/bin/bash only. Did you mean how I execute it? I just tried executing it as ./script.sh and it worked. But it doesn't work as script.sh or sh script.sh and I am pretty much sure I used to use only the latter two methods while I created it a week ago. What could explain that? –  Ashfame Feb 27 '11 at 16:22
@Ashfame: maybe a week ago it missed the features specific to bash you have now, so it worked also with sh script.sh –  enzotib Feb 27 '11 at 16:40
No I meant exactly this script used to work a week or two weeks ago. Or you meant some update might have made a change? –  Ashfame Feb 27 '11 at 16:42
@Ashfame: I don't know, this script, as you show it now, cannot work with sh script.sh. –  enzotib Feb 27 '11 at 16:49
ok may be I am wrong. Thanks! :) –  Ashfame Feb 27 '11 at 16:54
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I suspect that your "shebang" line (the optional first line of the file) is referencing sh instead of bash. It should be


for bash scripts. If the first line of your script is


then that would indicate that a strictly bourne-compatible shell is to be used; in the case of Ubuntu, dash is used. In many other distributions, this does not cause a problem, because they link /bin/sh to /bin/bash; however ubuntu links to /bin/dash in order to allow system scripts to run more rapidly.

The declare builtin is one of bash's many extensions to the Bourne shell script specification; dash just implements that specification without extensions.

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My shebang line is #!/bin/bash only –  Ashfame Feb 27 '11 at 16:06
@Ashfame: how are you running the script? If you are invoking it by just typing the name of the script, the shebang line will determine what interpreter runs it. However, if you explicitly invoke it via sh thescript.sh, the sh shell — i.e. dash will interpret it. –  intuited Feb 27 '11 at 16:57
@intuited I was running it through sh script.sh. I understand what you said, but I have read somewhere that with this method, bash will interpret it. Why would dash get it role here? Is it with Ubuntu only? May be what I read was for linux in general. –  Ashfame Feb 27 '11 at 18:03
@Ashfame with sh script you are running the command sh with the argument script, which makes sh read and execute the commands in that file. The shebang is not read by sh, it starts with a #, so it's treated as a comment. If you instead run ./script, then the kernel will read the shebang, which in your case is #!/bin/bash, and so it executes /bin/bash ./script –  geirha Feb 27 '11 at 18:48
@geirha yes thats how I know it works but @intuited mention that dash will be used, so I need to clarify it –  Ashfame Feb 27 '11 at 20:09
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I had the same issue, and then I remembered that you need to assign the right permissions to execute the shell script.

Change permission of the script, for example:

chmod 755 script.sh
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