Security :: W Shows 2 Users When There's Only 1?
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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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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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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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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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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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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May 19, 2010
I see these activities logged on a fairly regular basis in /var/log/auth.log and was wondering if this is normal activity?
firefox: gethostby*.getanswer: asked for "ftp.cs.rose-hulman.edu IN A", got type "DNAME"
The format is always the same, though sometimes the address is a regular Internet site.
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Feb 14, 2010
My wife was using cryptkeeper fine, then she right-clicked the keys on the panel and did something, I'm not sure what. Anyway, the keys you click on to open the encrypted folder are gone and I can't figure out how to get them back. System monitor shows cryptkeeper running. I can kill it and re-start it, but the keys don't show on the panel. I'm running ubuntu 9.10.
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Oct 8, 2010
if you go to Edit > prefs > security and choose to show saved passwords they are displayed without entering root pw. This seems to be a huge security hole. How do we fix this?
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Mar 9, 2011
After installing ubuntu 10.10 on pc i had it running fine for roughly 2 weeks. i have selected automatic login so i do not need to mess about logging in etc, but recently my pc asks for my password to unlock keyring once it shows my desktop.
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Dec 10, 2010
Some time back using this computer a SucKit rootkit was found. Having dd urandomed the drive, flattened CMOS battery, flashed BIOS, run Knoppix live CD 6.1,using no flat pack battery (laptop), and memtested the RAM, I am still having problems with what I suspect is a javascript file that tries to reload the rootkit from? firmware. I suspect the firmware as everything else should have eradicated it??
Also it or a hacker via a backdoor then corrupts the drivers so devices malfunction. Windows security programs and rootkit detectors don't seem to pick it up. Fresh install of Windows or linux after the above still show this problem, though internet not used. The person who admitted rootkitting this machine is capable of writing java programs or using javascripts to do all this.
When viewed using Ubuntu 8.4 files and dates on a Windows partition appear normal both in file manager and terminal. However booting using Knoppix CD these files are all green, and I cannot change their permissions, even as root. ie: everything is green including text files etc. If I copy them to a linux partition, I can change their permissions and make them nonexecutable and nonwritable. Also on the Windows FAT32 partition the . directory has the date 1 Jan 1970.
If I disable any green files, I can shutdown and reboot cleanly. If I don't I start having problems shutting down [/usr/sbin/init ?] And always these follow a pattern:
Can't remember details as I have now corralled the beast but error messages relating to:
nfs-server
inet.d/statd
are the start of these.
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Jul 9, 2011
I like the easy readability of fwlogwatch (as compared to the Log File Viewer). But fwlogwatch doesn't display port number or date when I run it in terminal.
Is there a log viewer that displays clean like fwlogwatch but displays all the information that Log File Viewer does?
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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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May 24, 2011
I want to restrict some of my Operating System users running unwanted commands. I just want them to run specified commands only. How can i achieve this?
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Feb 6, 2011
OS: Fedora 14 i386It's used as a ""normal desktop laptop""."USER A" - it's the mainly used user, i log in with GDM with it, etc.Goal: I need a little more security - separate a few apps!How: run 3 applications ( Transmission, Google Chrome, Wine ) with other users ( so not with "USER A" ). But when i'm logged in ( in GUI ) with "USER A", i need icons on he's the Desktop. E.g.: just one click ( without asking for password!! ) and Google Chrome starts with another user.How exactly can i do this? - How can i "grant" "USER A" with permissions ( securely ) so that it doesn't needs a password, when running applications with "USER B", "USER C", etc.?
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Apr 14, 2010
I've installed Ubuntu Desktop Ed 9 and I want to add a user account that would be very restricted. I would only want them to access the internet and run several programs. I do not want them to have access to the destkop, anything under preferences, administration etc... Is this possible?
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May 13, 2010
I'm currently running tests on my SAM file on my XP partition. Partly because I want a password that is hard to crack, and also out of curiosity. While running John the Ripper (no options used) I'm noticing that there are 8 pasword hashes, yet only 4 users associated with WinXP. I know that JTR only does 7(?) characters when it check for a solution. Is the 8 hashes because it separates passwords longer than 7 into 2 hashes, and then cracks them individually as 2 parts? I did try googling this,
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Jun 9, 2010
I created a new user desktop user for my girlfriend to use my netbook, but when she logs in, it doesn't show the wireless network icon. Under users and groups, I gave her access to wired and wireless networks, and under the network settings,I changed our wireless to "available to all users". I'm not sure what the problem is here.I'm using ubuntu netbook remix 10.04.
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Aug 30, 2010
I need to be able to capture a users password when they login. I am well aware of the security issues with this and I'm ok with this.
We run a call center and I am working on migrating from windows to Kubuntu for the callers. It's policy that all callers must report their password to me, so I already know of everyone's password. There has to be some variable/script that I can "hack" to get the password they typed in to the login screen.
What I'm trying to do is that when a user logs in in for the first time, their profile is automatically created and set up. Setting up network drives, email, pidgin (which the password is stored in plain text anyway, so forget about security on that one), web apps, etc.
Trying to find information on How to capture a users password and all have been responded with the usual lecture on why you shouldn't do this. So I've heard it all before and I know of the risks. Like I said, I already have the callers password on file. If I could capture it, I wouldn't have to manually setup each profile every time we get a new caller, which is often since turnover is quite high in call centers.
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Jun 10, 2011
I set the profile for Firefox to enforce sudo aa-enforce firefox.Does this now apply to all users on my system or just the user I was logged in as?
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Oct 12, 2010
is that possible to have multiple users for one linux session? and how can i do that ? it's possible to creat virtual users for a session ?
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Mar 26, 2011
I just realized that I can access other users files and they can access my files simply by using the console to navigate the file system, Its not that big a deal, I am the only one using the computer but this seems like something is not configured correctly. Should each user be able to look at and modify each others files by default? (On Xubuntu 10)
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Jul 22, 2010
I'm using Fedora 10 as a proxy server using squid, but I recently noticed that some users use the IPS's Dns to bypass the proxy and surf the web freely. So my question is, is this a problem with Squid or perhaps I can solve the problem whit IPTables.
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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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Jan 6, 2011
Thought about posting in the Networking board, but I believe this is a much more security-oriented thread. So let's say I bring my computer to a public place, say a library with one open, public, shared wireless network. I connect to that network. Let's assume that everyone else who's connected is using Windows. Can they see my computer (through Network Manager or other software) and attack it (SYN flood or something)? Or does it depend on the network settings?
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Mar 17, 2011
I have 2 servers, web server & mail server. they show 2 users in the summary area when I run w or top commands. But the actual list of users logged in (using either w or who) shows only 1 user.
ps -ef |grep username only shows my current login as a running sshd process.
So I can find no trace of this other user except in the summary line for w or top. I have no shells or other logins left running elsewhere or abruptly terminated, no gui sessions (these are servers), no tty logins. Do I have another user logged in? Has someone hacked me & covered up most of their trail? Why do these commands show 2 users when everything else points to 1 user?
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Apr 12, 2011
I read the log
Code:
I found this print out:
Code:
The line in bold is the security issue. There is only 1 user account on the system. There should only be 1 user logged in, not 2 users logged in. The remainder of the log file lists 1 user logged in, for similar log output. 2 users logged in does not appear again in the log file.
Does the second line of bold indicate that an attempt was made to log in to the system using SSH?
There was an internet connection interruption (no service) around the time of the log file event. The service did return, later.
Does that line indicate that an unauthorized user logged in to the system?
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Jun 11, 2011
I am looking for the best method to implement SSL for my sites but without users having to accept the CERT and I'm small so I'd want to use the cheapest method like signing my own certs. Is there an automatic way of doing it or best practice?
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Jun 23, 2011
I am stuck in a weird situation and could definitely use some help from gurus in security area.
I have categorized my users into 3:
1. root user
2. other local users
3. LDAP users
I want to setup following 2 usecases:
a)
1. Allow keybased ssh and scp to root users
2. Allow ssh but disallow scp service to other local users
3. Disallow ssh and scp to LDAP users
b)
1. Allow keybased ssh and scp to root users
2. Disallow both ssh and scp to other local users
3. Disallow ssh but allow scp to LDAP users
For the 1. in both cases, I think PermitRootLogin in sshd_config could . For the 3. I am thinking of deploying rssh to control scp service access, since ssh will be restricted anyways.
Problem area is 2. primarily.
i) How to allow ssh but disallow scp to 'other local users'
ii) How to disallow both ssh and scp to 'other local users'
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Oct 25, 2010
Just noticed this, when I am logged into OpenSuse 11.3 under my default user (autologin) I have 3 of the same user logged in, eg when I run top it shows 3 users and when I run the users command it shows the same user 3 times. Is there any reason for this? Do I need to investigate this at all?
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