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After compiling a C program on Ubuntu 10.10, after executing chmod +x ./a.out, I am still getting bash: ./a.out: Permission denied. How can I run my new executable?

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Are you the owner of the file? You're not building as root, are you (using sudo, etc)? –  Marty Fried Jul 8 '12 at 20:16

1 Answer 1

One possible reason is that you are compiling on a file system that has been mounted with the noexec option.

Run mount -l to see the options that file systems are mounted with.

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