I have a script in the current directory, however, given that:

  1. the permission is -rwxr-xr-x
  2. the script has a shebang #!/bin/bash at the top of the file
  3. my shell is /bin/bash
  4. I can execute it using bash script.sh

I cannot execute it using ./script.sh. It gives me:

bash: ./script.sh: Permission denied

Why is this happening and what is the solution?

  • The execution is not allowed because the file is on a filesystem mounted with the "noexec" option. Use findmnt -u -T . to find out if that's the case. If you have root privileges, mount -o remount,exec <dir> should remove this option.

  • The execution is not allowed by MAC policies (SELinux, SMACK, possibly AppArmor). Check the system logs, starting with journalctl -n 100 and dmesg. Bypassing this (if you're the administrator) depends on which MAC system is actually in use.

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  • 3
    Thank you, in my case it is noexec. I got confused, I have this disk mount as /home ext4 auto,exec,rw,async,user 0 2 in /etc/fstab, why is it noexec? – Henry Jun 24 '19 at 21:28
  • 6
    Because you have the user option in there. – user1686 Jun 25 '19 at 14:15
  • What is MAC (in this context)? Not MAC address, I presume(?). – Peter Mortensen Jun 25 '19 at 22:03
  • 3
    Mandatory Access Control – Dancrumb Jun 25 '19 at 22:25

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