R: OT: Linux df question

From: Alessandro Vercelli <alever_at_libero.it>
Date: Fri, 11 Jul 2014 09:56:23 +0200 (CEST)
Message-ID: <1711594664.8941721405065383041.JavaMail.actor_at_webmail2>

Hi Joe,
your error is due to oracle user permissions on filesystems. Non-root users are permitted to run df against mounted filesystems, but they must have execute permission on the parent directories of the mount.

In your case, oracle user is granted to run df against /boot filesystem but it needs execute on /boot/efi.

To correct the problem:

          # chmod go+x /boot/efi

However, a better workaround is to add oracle user to the disk group

          # usermod -aG disk oracle

in order that /boot/efi is not readable to all users.

Greetings,
Alessandro

>----Messaggio originale----
>Da: JSweetser_at_icat.com
>Data: 10/07/2014 19.17
>A: "oracle-l (oracle-l_at_freelists.org)"<oracle-l_at_freelists.org>
>Ogg: OT: Linux df question
>
>A bit of strangeness on a new server.
>
>$ cat /etc/redhat-release
>Red Hat Enterprise Linux Server release 6.1 (Santiago)
>
>Systems team had the system up but could not get a 10gb ethernet card to
work. However, the output of df -h was normal when logged in as the oracle user.
>
>They did something yesterday (new card at a minimum) and now the 10gb
interface works but the df command throws an error (though it does complete). This doesn't appear to be causing any issues but it does bug me a bit. I can't find much online about the error other than the grub file down that tree is needed for booting.
>
>(oracle)
>$ df -h
>Filesystem Size Used Avail Use% Mounted on
>/dev/sda7 73G 5.5G 64G 8% /
>tmpfs 95G 88K 95G 1% /dev/shm
>/dev/sda2 200M 24M 176M 12% /boot
>df: `/boot/efi': Permission denied
>/dev/sda6 97G 22G 71G 24% /opt
>/dev/sda3 842G 4.7G 794G 1% /u01
>/dev/sda4 842G 58G 742G 8% /u02
>/dev/sda8 837G 7.7G 787G 1% /u03
>/dev/sdb1 2.8T 58G 2.6T 3% /u04
>
>(root)
># df -h
>Filesystem Size Used Avail Use% Mounted on
>/dev/sda7 73G 5.5G 64G 8% /
>tmpfs 95G 88K 95G 1% /dev/shm
>/dev/sda2 200M 24M 176M 12% /boot
>/dev/sda1 200M 256K 200M 1% /boot/efi
>/dev/sda6 97G 22G 71G 24% /opt
>/dev/sda3 842G 4.7G 794G 1% /u01
>/dev/sda4 842G 58G 742G 8% /u02
>/dev/sda8 837G 7.7G 787G 1% /u03
>/dev/sdb1 2.8T 58G 2.6T 3% /u04
>
># ls -ld /boot
>drwx------ 4 root root 16384 Dec 31 1969 /boot
>
># ls -ld /boot/efi
>drwx------ 3 root root 16384 Dec 31 1969 /boot/efi
>
>Any/all ideas/comments welcome.
>
>Thanks,
>-joe
>
>
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Received on Fri Jul 11 2014 - 09:56:23 CEST