Centos – Permission denied when trying to execute a program as root on CentOS

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I am logged as root on a CentOS server but I am not able to run a program.

I have compiled using cc a basic helloworld program, trying to run it outputs:

bash: ./a.out: Permission denied

I have tried to chmod +x a.out but no success.

The rights seems to be ok:

-rwxr-xr-x. 1 root 6426 Nov 15 10:50 a.out*

I don't know what this "*" means.

Best Answer

I am going to guess that filesystem that is underlying the directory the file is in is mounted with the noexec attribute which will disable the execution of files.

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Do not run the command you are trying to run

If you try to redirect output from sed back into the same file it will blank it out, deleting all of the files contents. Try something like this:

sed s/world/cat/ <test.properties >newtest.properties && sudo mv newtest.properties test.properties

You get permission denied because the redirection part of the command is not run via sudo, but run as your normal user.

The first command works because you are simply reading the first file and writing to a file you own, so you regular user could do that.

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What appear to be the file (and parent directory) permissions when seen from Linux?

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Also: have you tried bash <script>?

Best Answer

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