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<H1>[Mageia-discuss] Need help recovering execute permission on local files</H1>
<B>Len Lawrence</B>
<A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20Need%20help%20recovering%20execute%20permission%20on%0A%20local%20files&In-Reply-To=%3C4FD60090.2030808%40gmail.com%3E"
TITLE="[Mageia-discuss] Need help recovering execute permission on local files">tarazed25 at gmail.com
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<I>Mon Jun 11 16:28:32 CEST 2012</I>
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<PRE>On 11/06/12 13:58, Alejandro López wrote:
><i>
</I>><i>
</I>><i> On Mon, Jun 11, 2012 at 2:30 PM, Len Lawrence <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">tarazed25 at gmail.com</A>
</I>><i> <mailto:<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">tarazed25 at gmail.com</A>>> wrote:
</I>><i>
</I>><i> On 11/06/12 12:28, Doug Laidlaw wrote:
</I>><i>
</I>><i> On Mon, 11 Jun 2012 11:33:46 +0100
</I>><i> Len Lawrence<<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">tarazed25 at gmail.com</A> <mailto:<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">tarazed25 at gmail.com</A>>>
</I>><i> wrote:
</I>><i>
</I>><i> After a warm reboot this morning I found that I no longer
</I>><i> had the
</I>><i> ability to run my own commands even though the permissions
</I>><i> are correct
</I>><i> and ownership is lcl (uid=500). User system commands are
</I>><i> OK so
</I>><i> running a script via ruby for instance works but trying to
</I>><i> execute the
</I>><i> script by itself fails even though it is fully executable.
</I>><i> This
</I>><i> applies to all my local bin commands. Command aliases
</I>><i> however do work
</I>><i> as long as they do not involve running any of my bin files.
</I>><i>
</I>><i> Even root cannot execute these bin commands; same message
</I>><i> "Permission
</I>><i> denied".
</I>><i>
</I>><i> In addition the system has switched me to autologin.
</I>><i> Trying to run
</I>><i> mcc I was told it cannot be run in console mode (??). If
</I>><i> I login as
</I>><i> su mcc comes up in console mode, which I am not inclined
</I>><i> to use.
</I>><i>
</I>><i> The hostname on this machine is belexeuli; this does not
</I>><i> appear in
</I>><i> the command prompt: [<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">lcl at localhost</A> ~]$
</I>><i>
</I>><i> After su: [<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">root at belexeuli</A> lcl]#
</I>><i>
</I>><i> This may all have something to do with my adding groups
</I>><i> and changing
</I>><i> group ids yesterday in my attempts to implement a viable
</I>><i> sudoers
</I>><i> command. It worked and I could log out and in again
</I>><i> without any
</I>><i> problems. I even managed a reboot without trouble but
</I>><i> today is
</I>><i> another story.
</I>><i>
</I>><i> I suspect that solving these multiple problems is beyond
</I>><i> my technical
</I>><i> skill even with help so a full reinstall is probably the
</I>><i> best bet.
</I>><i> However I will await any comments.
</I>><i>
</I>><i> Len
</I>><i>
</I>><i> You say that the permissions are correct, but do they include
</I>><i> execute
</I>><i> permissions? The prompt difference may be simply that root's
</I>><i> prompt is
</I>><i> no longer the same as a user's prompt. It is set by a config
</I>><i> file for
</I>><i> each user. You can see the code for it by typing "echo $PS1"
</I>><i> In my
</I>><i> case, that gives "[\u@\h \W]\$" The \h puts in the hostname.
</I>><i> You can
</I>><i> change it for the current session by typing at the user prompt:
</I>><i>
</I>><i> PS1="[\u@\h \W]\$"
</I>><i>
</I>><i> You can make that permanent by putting it in your
</I>><i> .bash_profile, where
</I>><i> it should override the other at your next login, but really,
</I>><i> it is only
</I>><i> a workaround.
</I>><i>
</I>><i> With so many issues, I would do a full reinstall, but more
</I>><i> knowledgeable
</I>><i> people tell me it is the easy way out.
</I>><i>
</I>><i> HTH,
</I>><i>
</I>><i> Doug.
</I>><i>
</I>><i> Yes, all the commands have execute permission. I have been using
</I>><i> my local bin directory for years and I have never had execute
</I>><i> refused so this must reflect some deep system level screwup
</I>><i> relating to lcl and maybe something in pam.d. That is unknown
</I>><i> country for me.
</I>><i> Until yesterday there was no lcl group, only user lcl. The group
</I>><i> for lcl was live, which I have
</I>><i> removed from my group list. live was my primary group, now it is
</I>><i> lcl which I added yesterday. Ownership of my files is now lcl:lcl
</I>><i> and in /home/lcl/bin the permissions are nearly all 755.
</I>><i> Note that I can chmod -x <file> and chmod +x <file> but that does
</I>><i> not change anything.
</I>><i>
</I>><i> I notice that home now contains a "live" directory: /home/live,
</I>><i> ownership lcl:lcl, containing tmp and nothing else. Now that is
</I>><i> weird.
</I>><i>
</I>><i> The difference in the root and user prompts is probably related to
</I>><i> the fact that root cannot access the user's X display. I have
</I>><i> seen that sort of thing before when the two have been using
</I>><i> different hostnames. I think that root is now looking at
</I>><i> belexeuli:0 whereas the user has for some reason reverted to
</I>><i> localhost:0. Attempts at using the gui by root throw up protocol
</I>><i> errors.
</I>><i>
</I>><i> As you say, a reinstall looks like the best way out. More
</I>><i> knowledgeable people would probably know just where to look for
</I>><i> the root of the problem(s) but even after 21 years experience of
</I>><i> Unix and Linux I know next to nothing about access and security
</I>><i> policies.
</I>><i>
</I>><i>
</I>><i>
</I>><i> Maybe it was somehow mounted with the -noexec flag?
</I>><i>
</I>><i> Alejandro.
</I>><i>
</I>><i>
</I>mtab contains this entry:
/dev/sda6 /home ext4
rw,nosuid,nodev,noexec,relatime,user_xattr,barrier=1,data=ordered 0 0
fstab had:
# Entry for /dev/sda6 :
UUID=341956e4-fddb-45a6-a191-4c912328ec7a /home ext4 user,defaults 1 2
none /proc proc defaults 0 0
I have removed the "user," because it does not tally with my other mga2
workstation.
That does not have noexec against /home.
About to reboot.
Thanks for the pointer.
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