Fedora Security :: Top Shows 3 Users In A Single-user Laptop?
Jun 20, 2010
I am running Fedora 13 - 64-bit variety and using KDE as the gui. No real issues asides from machine not exactly flying, but then this is a mere core 2 duo 1.6 with 2 gigs of ram, so not unexpected...
When I run top I see 3 users indicated - which worries me somewhat... I am the only user on this machine.
I come from a Debian / Ubuntu /Gentoo knowledge-base and this laptop is a fresh install, encrypted partitions, temp has own partition (encrypted too) and obviously the firewall is on, with ssh service turned off and ssh access removed in the firewall....
is this 3 users in top normal, or have i managed to be hacked in the 3 - 4 days since I started the install ? In all this time I have been sitting behind a router when on the net.
Am I looking at a fresh install, or are there valid reasons for the extra users?
I just ran "users" in terminal and I show up 3 times - I have only logged in once, through the GUI and no extra access routes
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Sep 19, 2010
I'm on Debian 5 - when I run the w command, it reports 2 users, but I'm the only person logged in. Is this cause for concern?
Code:
curos@histeria:~$ w
16:17:25 up 4 days, 11:56, 2 users, load average: 0.00, 0.00, 0.00
[code]....
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Mar 25, 2010
I was wondering whether or not it is possible/advisable to install and run Snort on a single laptop with a wireless router (firewall enabled)? Does Snort require root privileges and are there any other issues one needs to be aware of when installing and running software like this?
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Jul 14, 2009
When I go to single user mode for resetting root password, It ask root pawssword for login.The message displayed on prompt is "Give root password for login.On the boot prompt, I select kernel and press 'e' and after one space type 1 for single User mode and then press 'b' for booting.It shows message entering in single user mode but ask root password. Even I tried into rescue mode, but I couldn't ser root password.In rescue mode on prompt, It shows rescue login: I typed root, But when typed 'passwd' foe resetting root pawssword,It shows message unknown user and not authetication.
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May 12, 2011
I'm planning to centralize users and passwords and also create controls for user access to some equipment, for example, Linux Servers, Switches, routers and firewalls. In case of failure of the link between the ACS and AD or equipment to the ACS, this device would use local username and password.
At the moment, my AD structure is a Microsoft, Cisco ACS servers and Linux Standalone. I wish that both linuxs servers and network equipment were authorized by Cisco ACS on the accounts that are in Microsoft AD.
The configuration of the Cisco ACS to use the AD is done and no problems, the network equipment is OK too, but am having difficulties configuring the server for this solution.
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Mar 22, 2009
what things can i do in single user mode?is there a guide out there can help me out how to navigate in single user mode?in links that focus only on user user mode?being in single user mode in other istro all the same? debian, fedora, suse. etc
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Mar 29, 2011
I'm just working on fedora for the first time for my proj. So having many difficulties. My first doubt is that is it possible to record audio in single user mode using fedora? I need it for my proj work. I tried arecord and rec in single user mode.. I'm getting an error stating pulse audio connect error.
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Jun 9, 2011
I've checked gdmsetup and there isn't anything that I can see that keeps my general users from getting in remotely. I can get the Gnome to login as root but not as a user. SSH from PuTTY works fine for all users. The error I get actually says that the username or password is incorrect - checked using SSH and it is fine.
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Mar 8, 2011
I have few virtual machines running on one of xen servers & I'm experiencing a problem booting up one of clients "domain".
How can I force this machine to boot up to runlevel 1? I can't see grub menu when first booting it up!
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Mar 25, 2011
I'm just working on fedora for the first time for my proj. So having many difficulties. My first doubt is that is it possible to record audio in single user mode using fedora? I need it for my proj work..I tried arecord and rec in single user mode.. I'm getting an error stating pulse audio connect error. Connection refused..
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Jul 14, 2009
I have a new server with Fedora 10. The root user can log in by SSH using an RSA key but for any other user the RSA key is ignored and a password required.Ultimately I wish to access an SVN server over SSH and would like to to have to keep entering a password. I have Googled this issue and found nothing.If I log on as root the /var/log/secure file shows that the key is accepted, for any other user no message is added and the password is requested.I have checked all the config files and as far as I can see they are all correct so I am at a complete loss as to why SSH will not use the users RSA key.
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Apr 17, 2009
Being able to reset the root password by booting into single usermode by editing grub. This is a MAJOR flaw. I know it makes no real difference against internet bourne attacks, but even so I must say I found it shocking. The only way I've found to stop this is to encrypt the entire HDD, so noone could get into single user mode without first knowing the encryption key/password.
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Jul 26, 2010
I need to create a number of internal Linux users for admin purposes. I do not want these users to appear on the initial console login page just after Fedora boots up, as users who can attempt to log in, and I do not want to allow these users to log in directly. I merely want these users to be accessed via su, just like the root user.
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Nov 1, 2010
We are trying to set up a classroom training environment where our SIG can hold classes for prospective converts from Microsoft/Mac. The ten machines will have /home/student01..10 and /home/linsig01..10 as users. We want /home/student01 to be able to explore and sudo so they can learn to administer their personal machines at home. We don't want them to be able to modify (sudo) /home/linsig01. I've seen the tutorial on Access Control Lists but I'd like other input so we get it right the first time.
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Oct 30, 2009
Is it possible in Linux to restrict POP3 or IMAP for particular users.I need a confirmation on this, that it is possible or not in Linux.
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Aug 24, 2010
I have my own dedicated server box running (using it for game servers). I access it via ssh and I have root control of it. It has FEDORA Operating System. I wanna give FTP control of different directories to different users. Right now there are no other FTP users except root. I have installed vsftpd and dont know what should I do next? How do I add users (who can read/write/delete files) and How do I restrict them to their home directory?
Here is what I want:
username:client1
password:12345
home directory: home/server1
username:client2
password:12345
home directory: home/server2
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Apr 21, 2011
When I'm logged into my account, I can't shut down the computer if someone else is also logged in unless I supply the root password. However, if I log out, I can shut down from GDM without being challenged, even though another person is logged in, which could cause problems if that person is in the middle of some work. Is there a way to password-protect the gdm shutdown function if people are logged in?
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May 11, 2011
This is a simple question which hopefully has a simple answer. How do I set up a directory on my user account which is visible and accessible to other users on the *same machine*? For example I have certain files on my account which, if I want another user to be able to access I'd have to (a) copy them to my thumb drive (b) log out, (c) log in to the other account, (d) copy the files from the usb thumb drive
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Jun 20, 2011
I would like to share same vnc session between two users, as both users need to look at the screen in order to make few observations.
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Feb 22, 2011
i have installed bless hex editor on my fedora 14 laptop.However when i open it ,it shows "mono-core wants to install a font language code not matched: utf-8" i am not able to use bless hex editor properly.
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Jan 21, 2011
After today's update in Maverick, GDM showed no users in the greeter and so it was impossible to input any login info through the GUI, though Alt-F1 console worked. I re-installed GDM and a variety of other packages to no avail.
I found this same problem in an old OpenSUSE message: [URL]
Indeed, console-kit-daemon isn't running, and if I start it by hand and restart gdm, all is fine.
I also see the error message Error org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program /lib/dbus-1/dbus-daemon-launch-helper: Success#012
in the logs. I also get a similar popup after logging in. It says "You might not be able to connect to the Bluetooth network via this machine."
why console-kit-daemon would fail to start?
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Jul 4, 2010
The normal user is now in the sudoers group. How can i allow it to install programs using it's own password rather than having to know the super-secret Root-Users password?
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Apr 16, 2010
I need to write program (preffer Python) to change range for users. Does anyone know some library which can help me to do that? Maybe someone has written program like that?
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Oct 15, 2010
To avoid having to input a password for the keyring each time I connect to the net via wireless, I enabled the 'Available to all users' option in Network Manager. Now, my question is this. Are the 'users' it refers to just those created on this machine? Would a drive-by be able to use my network without entering the password?
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Jul 3, 2010
i installed ubuntu on my samsung x30 yesterday while connected to my external monitor. when i power on my laptop the samsung start up screen appears both on my laptop and monitor however as soon as ubuntu starts the laptop screen breaks into two solid colours, ubuntu only works on the screen.
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Aug 17, 2011
How can I configure a single computer to work for multiple simultaneous users? I would like to have multiple keyboards and monitors on a single PC ... Is it possible? This set up I'm planning for CyberCafe, For cyberCafe business ROI is very slow... so was planning to have something like this....
-single CPU (Which would act as a server)
-Multiple monitors, keyboards, Headphones etc....
If this works out then I would save a lot on my investments (OS cost, Hardware devices, electricity etc)
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Feb 22, 2010
My question is probably very common, but I didn't find an answer.I have several computers, each with different user. Each user has a shared folder in samba. I want all users to access all these shares with a single login/password (not with the login/passw of each particular user)
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May 12, 2010
I have an environment with multiple projects that have a variety of government and commercial sponsors. We have been satisfied to this point with a netapp serving nfs/cifs and keeping a tight reign on nfs exports.Some of these projects have started asking us to provide access restricted sub-folders of the project space based on different groups that contain a user subset of the primary group.
We have a linux machine that serves as a version control front end to the netapp, mounting the project spaces via nfs. People are now mounting their project space via sshfs to this "front end" and sharing the root password of this sshfs client with everyone in their project, in turn creating a security hole to access the so called restricted sub-folders. I know all the obligatory responses referring to irresponsible user behavior but would like to see how others have addressed something like this where user behavior seems out of control.
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Aug 10, 2010
i switched completely to ubuntu, and it was working fine. now when i try to start up my laptop, it just shows a blinking _ and i have no idea what to do.
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Nov 10, 2010
I'm accustomed to Ubuntu showing 3.9GB out of 4GB on my desktop. That's completely ordinary and expected: The kernel uses a dozen megs or so, which are not accounted for in the reported memory totals. After truncating, that brings us to 3.9GB.
I was expecting to see the same thing on my Elitebook 8740w, but System Monitor is reporting only 3.7GB instead, using the same version of Ubuntu. free -m shows:
total used free shared buffers cached
Mem: 3819 935 2883 0 80 287
-/+ buffers/cache: 567 3252
Swap: 4095 0 4095
That is to say, the total of 3819MB is not missing a mere dozen or so MB but a full 267MB from 4096MB! That's WAY too much to be accounted for by the kernel, so something else is going on!
Please note the following:BIOS shows the full 4GB, and so does lshw.
uname -a = Linux COMPNAME 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:45:36 UTC 2010 x86_64 GNU/Linux
lspci | grep VGA = 01:00.0 VGA compatible controller: ATI Technologies Inc Broadway XT [Mobility Radeon HD 5800 Series]
That is to say, I really do have 4GB RAM, my mobo and BIOS recognize it, I really am running a 64-bit OS, and I really shouldn't have any kind of onboard graphics.
The devil lies in the details though: I SHOULDN'T have any kind of onboard graphics...but the best explanation I can come up with is that 256MB or so are being set aside for that purpose anyway. This is a mobile workstation with dedicated Firepro graphics (based on the Mobility Radeon HD 5800), and it's well beyond the range of laptops that include switchable graphics. However, it has an i5 processor, so I think it's conceivable that the laptop is being tricked into allocating RAM for integrated graphics. This is especially likely considering I get the same i915 error as the threadstarter here, and I have very similar command line output.
Presumed Problem: Long story short, I think Ubuntu is seeing the i5 processor and setting aside 256MB or so for the integrated graphics which it THINKS I have, which are actually totally unavailable to use on this particular laptop. If this is the case, does anyone know how to make it stop doing this, so I can make that memory accessible to the rest of the system?
Update: Interestingly, even Memtest is showing only 3952MB. This may or may not account for the full missing amount, but it obviously counts for a lot. I'm used to Memtest showing I think 4095MB on my desktop, meaning Memtest itself presumably only takes ~1MB. Actually, even on the laptop Memtest says only 1024KB are reserved, so 143MB are totally unaccounted for.
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