Ubuntu Security :: Lost User Privileges To Mount Volumes From Naultilus?
Sep 13, 2010
I'm running 10.04 running daily updates. A couple days back, I saw an update related to mounting volumes. Not sure if this is what broke my system, but might be. When attempting to mount a partition from nautilus, I get a message saying I do not have authorization. It does not even ask for my password, just fails. I tried running updates and this asks for my password and accepts it fine. I opened disk utility from the menus and tried to mount the volume from there but also got the same permission denied, not authorized without even being asked for my password.
I then ran gksu palimpsest. I was asked for my password and was able to mount and unmount partitions from there. However, when mounted, my applications and nautilus cannot access the data in the partitions mounted using gksu palimpsest. In nautilus, I can navigate to /media/Data (the partition in question) but I get "THE FOLDER CONTENTS CANNOT BE DISPLAYED You do not have the permissions necessary to view the contents of "Data"." When I open nautilus via gksu in the terminal, I do have full access to the partitions.
How do I get my privileges back for my user account. I am the only user on the computer, and I have never set up a root account since my upgrade to 10.04 months ago. I tried of course the Administration->Users and Groups menu, but I am not permitted to change the account type or open advanced settings. I click the button, but nothing happens, not even a password request. Running gksu admin-settings on the terminal allows me access. My current settings are attached.
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Apr 11, 2010
I have searched somewhat this forum but haven't yet found a similar post using the keywords I entered but perhaps there is already a similar post then please refer me to it.I am trying to add a user account "Guest" to allow people on my laptop without giving them access to vital parts of the computer. Basically, I want them to only be able to view their own home directory and access internet. Nothing more.I have set the group to "guest" and changed the other home directories of other users to owner access only.
Guest still has access to root and is still allowed to perform actions in various critical areas (deleting files from for example my Windows 7 partition). This I also want to prevent. I was thinking to set each directory's permissions to Owner and Group only and remove Others access.My questions:
1. Will this have any undesirable impact (programs of main user accounts not able to access certain directories)? For guest user I don't care as long as internet works.
2. When I start User Manager and disable for Guest all options except "access internet" (so I also disable access to CDROM), the guest can still access the CDROM. Does this mean the User Settings menu has no effect or is overruled by something?
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Nov 6, 2010
Is there any way to user can increase or lower his privileges? I tried by "semanage login" but it works only for admin i think. I would like for example change range form s0:c0 to s0:c0.c10 and vice versa.
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Mar 29, 2009
I have two NTFS volumes I want to automount at boot. I can't get my user account to mount them in Fedora 10. I keep getting the message that the two lines I have edited in fstab are bad. The volumes are sda2 and sda8, and the volume names are SPACELAB and Spaceman. I also need to be able to mount an NTFS usb drive from time to time. I am getting frustrated, so I have posted my fstab file below,
#
# /etc/fstab
# Created by anaconda on Sun Mar 1 12:44:11 2009
#
[code]....
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Feb 21, 2011
i am relatively new to ubuntu. Just recenty i have not been able to access certain files(for example the history and bookmarks in the firefox folder), download files individually from the internet(music,fonts,etc), recieving an error message
Quote: Originally Posted by firefox error console
Error: [Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIFileOutputStream.init]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: file:///usr/lib/firefox-3.6.13/components/nsSessionStore.js :: sss_writeFile :: line 2944" data: no][code]...
i have sudo priveleges and can install via update manager. i read somewhere that compizfusion might affect access permissions and i do use compiz and emerald at the same time.
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May 24, 2011
In our group we use NIS and have a group set up called netadmin which is given root privileges on each machine. Each machine also has a localuser called localuser created and used during installation. When logged in as a member of netadmin, attempting any action that requires root privileges (e.g. installing software in Ubuntu Software Center) results in a prompt asking for localuser's password, not the current user's password.
Does anyone know the cause? Configuration issue or Ubuntu issue? We can get around it.
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Sep 26, 2010
I often get responses from people who first say: "Are you sure? You want your network to be exposed to the outside world?" I am not experimenting on a Production Server of NASA or any Security Concern Department. Friends, there is no harm in experimenting on your personal computer or on a test computer which is isolated from the production environment. Look at hackers! What do they do? If they don't know how security is breached then how would they come up with security measures?
If my question reads... "How to let any user perform Administrative Tasks on a Linux System irrespective of his/her privileges on that particular system?" then I would not get the right answers in the first place. They will say... "You are letting everyone destroy your system... are you sure you want to do that?" My question is: Why should we restrict ourselves from experimenting even if it sounds weird to other people?
I give you an example where it is desirable to let an unprivileged user perform certain tasks. You want to know if there are any employees in your office who are storing videos in their home directory and filling up the disk space to a great amount. You have a department called "Command Center or Data Center Operations or Help Desk" call it whatever you would, whose work is to monitor such activities, and you create an account "monitor" for them to monitor such activities but they are not able to do them:
[Code]..
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Oct 15, 2010
One user in my company wants to run some flush cache queries on a MySql database, it needs "reload" privileges of Administration, how secure is to give this rights to a normal user ?
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Oct 30, 2010
Ive done something, Im not sure what...... I was trying to backup my mysql DB so I can reformat that server and install different server OS, then reinstall mysql and restore the DB... Well, somewhere in this mess I did something and now I get DBI connect failed : Access denied for user ''@'localhost' to database 'mysql'CONSTANTLY! I cant see any of my SQL DB's anymore... I just need to get the privileges back that Im missing, back up these DB's and get on with this already!
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Mar 25, 2010
Having read on the forums about some of the dangers of running Wireshark as root, I would like to know if anyone can suggest some alternative packet sniffers/network analyzers which will offer similar results but without the security issues. I am using Karmic Koala on a Fujitsu Siemens laptop with wireless router (firewall enabled)
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Aug 11, 2010
This applies to users of 10.04 (64 bit), but I would like to hear from those running 10.04 (32 bit) and 9.10 (64 or 32 bit).Would you be good enough to answer this question: Do you have an �enable scanner option� (or a variation of that phrase) in (GOTO) System-Administration-Users & Groups- [Your Admin Account]- Advanced Settings- User Privileges?It would be immensely helpful of you if you could do this and post me your answer.
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Sep 2, 2010
I'd like to add a user to my server that will only have access to a mount point over sshfs. Is there any way I can provide them this access without actually giving them permission to open a terminal on my server? I tried /bin/false and /sbin/nologin already, but /bin/false didn't allow the mount point to be made and /sbin/nologin prevented a login completely (also stopped the mount point from working).
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Feb 21, 2010
I have 9.10 and notice that when I look in Places none of my volumes/partitions are mounted - if I click on them I have to enter my user password to authenticate to gain access. My problem is that (with some help) I have set up rsync so it runs when I shut down my PC and backs up my Home folder from a partition on sda to a partition on sdb - this is great but sometimes it works and sometimes it doesn't.
I have done some tests and discovered that if I use my PC and never manually mount my backup sdb partition the rsync does not work (I also have GAdmin-rysnc so I can run manually backup but this also will not run if I do no mount the sdb volume). However, if I do mount the sdb backup partition and close down/restart then the backup works. What I need is my sdb backup partition to be automatically mounted every time I switch on - can this be done? I'm sure I had this working in 9.04 (auto mounting) but 9.10 seems not to like it.
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Mar 13, 2011
ubuntu on boot mount all my NTFS volume , and i'm a bit worried about this , outside my floppy
by the way this is not the point
i would love to know if there is a gui that help me to edit the startup/boot actions
i mean what should perform ubuntu in the boot startup
i'm looking for a gui (i prefer a gui then the console because i don't know how use it ) that help me to manage it
1) i would like to disable -> mount my ntfs volumes
2) in the future i would like to enable it again , i mean mount my ntfs volumes
now i would like to disable
is there a gui (program) that let me to edit the startup?
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Apr 21, 2011
I got a new computer today, a Compaq Presario CQ56, with Windows 7 preinstalled, and I want to dualboot with Ubuntu, but I'm having some problems. I'll explain what I've done so far, in case I did something wrong.
When I popped in my 10.10 Live CD, I was surprised to see there was not "install alongside existing operating system", which I thought I remembered from the last time I installed Ubuntu, but I chose manual partitioning and continued. I'd never done this before, so I quickly learned I had to first create a (couple) partition(s).
After freeing up a large amount of space and rebooting twice as recommended, I booted off the Live CD and opened GParted, intending to create a Ubuntu system partition, one for swap, and one for my home folder. When I right-clicked on my unallocated space, I got the error message "It is not possible to create more than 4 primary partitions". After a little googling, I found I had to eliminate one of my primary partitions and create a new extended partition, which I could then partition further. Noticing I had a partition that didn't seem important, HP_TOOLS, I googled and found this.
When I inserted my flash drive, it didn't automount. When I tried to mount by right-clicking and clicking "Mount", nothing happened. I also cannot mount the HP_TOOLS partition, nor any other. They don't mount when I click on them in the Places menu, and they don't mount when I right-click and choose Mount.
My main question is "Help! How do I install Ubuntu?", but I think if I can create these partitions, which requires mounting the drives (I think), I can figure the rest out.
A screenshot of my GParted window is attached, if that helps. (I couldn't see how to insert it without a URL)
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May 18, 2011
this is all wrong:
# cd /root
# mkdir ./mnt
# mount /dev/sda7 ./mnt
mount: /dev/sda7 is already mounted or mnt is in use
[Code].....
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Jun 28, 2011
After applying Ubuntu updates i am now unable to mount volumes it tells me that i am denied.I have checked my user permissions and i am allowed to mount. I have also downgraded MountAll to no avail.
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Nov 15, 2010
I upgraded aaa_elflibs as per Eric's advice here:URL..Now I can't access anything.it boots into tty1 and won't mount any of my logical volumes.
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Sep 25, 2009
I have a media server running OES2 on SLES 10.x after the network admin applied a patch to the system the machine will no longer mount the NSS volumes. I am relatively experienced with using linux, but I primarily use red hat and fedora so all these NOvell tools are a bit foriegn to me. I need to get the data off the volumes and restore the drives (ext3) asap. I dont want to screw around with eDirectory or OES2 unless I have to.
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Jun 12, 2010
I have a small problem on ubuntu 10.04, of which i know it can be solved. However, i'm not sure how to. The problem is; I need one user to be able to install updates, but not give it any other privileges. I have been messing around with the "sudoers" file in /etc a bit, and thought i needed to use the "NOPASSWD" But i'm not sure what to do after that.
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Sep 11, 2011
I inherited a 3ware 9550SX running a version of gentoo with a2.6.28.something kernel. I started over with CentOS 5.6 x86_64.tw_cli informs me that the 9-disk RAID 5 is healthy.The previous admin used lvm (?) to carve up the RAID into a zilliontiny pieces and one big piece. My main interest is the big piece.Some of the small pieces refused to mount until I installed theCentOS plus kernel (they are reiserfs).The remainder seem to be ext3; however, they are not mounted at boot("refusing activation"). lvs tells me they are not active. If I try tomake one active, for example:root> lvchange -ay vg01/usrI get:Refusing activation of partial LV usr. Use --partial to override.If I use --partial, I get:Partial mode. Incomplete logical volumes will be processed.and then I can then mount the partition, but not everything seems tobe there.
Some of the directory entries look like this:?--------- ? ? ? ? ? logfilesIs it possible that the versions of the kernel and lvm that wereon the gentoo system are causing grief for an older kernel (andpossibly older lvm) on CentOS 5.6 and that I might have greaterfortunes with CentOS 6.x ?Or am I missing something fundamental? This is my first experiencewith lvm, so it's more than a little probable.
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May 16, 2010
I accidentally promoted my initial account to admin and now I want to revert it but I don't remember the specific initial user privileges.So there are 2 questions:
1) First, is it safe to "downgrade" the account, logging in with another one? In general what's the best way to do it?
2) Could someone enter Administration->Users and Groups->[select initial account]->
Advanced Settings->User Privileges and list the privileges that are on by default?
I repeat I want the privileges of the initial account, which I suspect are above those of basic users (that are added later) and below admin...
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Jan 3, 2010
I'm just wondering - what is the best way to set up your encrypted volumes with dm_crypt and LUKS?
My understanding was that aes-lrw ws better than aes-cbc - and then I stumble upon [url] which says that LRW has some problems, and XTS is better? I dont know enough about encryption theory to be able to say anything, so i'm hoping some folks more enlightened will be able to say something here.
I was previously using aes-lrw-benbi to set up a volume. If xts is truly better - should i be using '-c aes-xts-benbi' then?
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Aug 10, 2009
how to mount the internal hard drive volume in root account.
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Sep 22, 2011
We have a Centos 5.6 server mounting two iSCSI volumes from an HP P2000 storage array. Multipathd is also running, and this has been working well for the few months we have been using it. The two volumes presented to the server were created in LVM, and worked without problem.We had a requirement to reboot the server, and now the iSCSI volumes will no longer mount. From what I can tell, the iSCSI connection is working ok, as I can see the correct sessions, and if I run 'fdisk -l' I can see the iSCSI block devices, but the O/S isn't seeing the filesystems. Any LVM command does not show the volumes at all, and 'vgchange -a y' only lists the local boot volume, not the iSCSI volumes. My concern is that, the output of 'fdisk -l' says 'Disk /dev/xxx doesn't contain a valid partition table' for all the iSCSI devices. Research shows that performing the vgchange -a y command should automatically mount any VG's that aren't showing, but it doesn't work.
There's a lot of data on these iSCSI volumes, and I'm no LVM expert. I've read that some have had problems where LVM starts before iSCSI and things get a bit messed up, but I don't know if this is the case here (I can't tell), but if there's a way of switching this round that might help, I'm prepared to give it a go.There was absolutely no indication there were any problems with these volumes, so corruption is highly unlikely.
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Jan 21, 2010
I am on the admin account of my computer and am trying to remove all privileges from CWD i have tried
chmod go-rwx ~
sudo chmod go-rwx ~
but when i pull up
ls -l ~
It is still showing permission in the g and o column.
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Oct 3, 2010
In Nautilus I select a directory on local NTFS volume. I'm logged in as root, right-click > Properties > Permissions and I set "Others" to "none". But it doesn't work. I want my friends & visitors to use and enjoy Ubuntu but without access to my NTFS volumes.
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Nov 13, 2010
I have a system, I want only my sudoer account to show and automount NTFS partitions under 'Places' in Ubuntu. Simply, they shall not have access to mount it. Only my main sudoer user account shall take advantage on this show-and-possibly-automount feature of GNOME, but not anyone else.
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Jul 17, 2010
I'm looking for a way of mounting an encrypted volume - home folder or a separate mount point, using only the standard login authentication (ie KDM or ssh). I thought the pam_mount module provided this, but I still get prompted for a password on the console at boot time. This is inconvenient as both my main desktops are headless HTPCs. I want the login credentials to be passed through, at log in time. I'm guessing this is possible, but to be honest, encryption is one thing in Linux that still completely confuses me.
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Jan 2, 2010
Is there a way to grant 'root' privileges to my user account? My account name ... I'll call it 'masterskop' as it is my forum name here, but not on my computer.Would it look like this in the sudoers' file?My purpose is to get access to all the folders and files in the 'File System'. The root and lost+found folders have 'Xs' on them...No access! And for example, under properties of the 'var' folder it states that 'you are not the owner, so you cannot change these permissions.' How can I get access to all of it everytime I login as the main user of my computer? I do not have anyone else using this computer.I did edit this file and used my real user name ... logged out and logged back in and still I do not have access/edit these folders and files.
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