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shell script

Posted on 2013-06-04
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Last Modified: 2013-06-22
[oracle@mac Desktop]$ ./top.sh
bash: ./top.sh: Permission denied
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Question by:walkerdba
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by:johnsone
ID: 39219707
You don't have execute permission on top.sh.  You would need to change the permission with the chmod command.
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by:Robert Saylor
ID: 39219709
do:
sudo sh top.sh

Open in new window


Then enter in the root password.
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by:slightwv (䄆 Netminder)
ID: 39219718
As johnsone pointed out... change the permissions:
chmod 750 top.sh

The alternative is force execution:
. ./top.sh
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johnsone earned 500 total points
ID: 39219760
. ./top.sh does not force execution.  That runs the commands in the current process (shell)  and does not fork a new process.  If your current shell is different than the shell that top.sh expects to run then errors could occur.

Depending on what you are doing in your script, this could also have unintended consequences in the original process as well.  In my opinion, only scripts that set environment variables should be run this way.
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Expert Comment

by:YZlat
ID: 39219891
try

chmod 0744 top.sh

Open in new window


or

chmod go+rx top.sh

Open in new window

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Expert Comment

by:slightwv (䄆 Netminder)
ID: 39219896
Maybe force was a poor choice of words.  I meant that it would execute a script that did not necessarily have execute permission on it.

I do agree with your other comments.

>>chmod 0744 top.sh

I would not give World execute on any script, ever.
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by:Robert Saylor
ID: 39219897
The issue is the user does not have access to sh. The user would need to be added to the same group that sh has.

root@linux [~]# ls -lha /bin/sh
lrwxrwxrwx 1 root root 4 Sep 14  2011 /bin/sh -> bash*

Open in new window


The fix should be to execute chmod 755 /bin/sh so sh will have group execute.
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 39219901
>>The issue is the user does not have access to sh.

I think I have to disagree.  What are you basing this on?
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by:Robert Saylor
ID: 39219924
sorry, yes you were correct. I just simulated it on my server.

mine@**** [~]# ./test.sh
-bash: ./test.sh: Permission denied
mine@**** [~]# sh test.sh
test
mine@**** [~]# chmod 755 test.sh
mine@**** [~]# ./test.sh
test
mine@**** [~]#
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Author Closing Comment

by:walkerdba
ID: 39267695
yes
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