Ubuntu Security :: Different Permissions For Different Accounts?

May 17, 2010

I have upgraded to Lucid, but was having the same issues on Karmic. I made a 2nd user acct we'll call X and we'll call the original acct Y. All of these issues only happened after creating X.

On X I have: sound Things wrong with X: I don't have the ability to modify any folders (even ones that are made from X's acct), I can't change the password or even access the Users and Groups, I can't modify any browser settings in Firefox but can on Chromium, the option for wireless is completely gone

On Y I have: the ability to access users and groups, the ability to modify all folders on either acct, the ability to change any settings on anything Things wrong with Y: no sound (doesn't even show the driver, but the driver is there on X's acct), wireless is completely gone (just like X's acct), even though I can access Users and Groups I cannot modify anything about X's acct

My first thought was to completely delete X since that's when all the problems began, but I'm afraid that since X seems to have "stolen" my sound card, that will be lost forever. I am also afraid that since neither account has wireless deleting X might hinder ever getting it back.

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Ubuntu Security :: Hotmail And Gmail Accounts Hijacked

Sep 8, 2010

I recently received an email from a friend without subject and just a link. Since we do that a lot, I clicked on it. I was taking to a website that looks like a phishing site and my computer hard drive started working feverishly. I closed it quickly.

First, I want you guys to be aware of this thing since it seems to be fairly new.
Second, I want to know if I have been compromised. I already changed the password on my gmail account and I accessed the site using Ubuntu and Firefox.

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Ubuntu Security :: Allow Sftp Access To System Using Accounts?

Nov 26, 2010

allow sftp access to my Ubuntu system (happens to be desktop as it's also my main system) using accounts that are not able to login normally. (I have already managed to create such accounts.) These accounts need to be chrooted (also already accomplished with the openssh daemon settings.) Where I run into problems is that I want to give them (read only) access to files outside the chroot (on another partition in fact) and the matter if made more difficult because the directories to be shared are on NTFS-3G partitions (as they are a shared linux / windows storage drive). Is this possible and if so, what do I need to do?

Edit - Forgot to include versions
Ubuntu 10.10
openssh 1.5.5p1-4ubuntu4 (the one that comes with 10.10)

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Security :: Danguardian And User Accounts

Apr 8, 2009

I have a windows 2003 active directory and dansguardian transparent web filter. I want that dansguardian filters according by whom is logged on the workstation. Can this be possible?

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Ubuntu Security :: Disable Listing Of User Accounts In 'Switch From'

May 12, 2010

Once again, nobody seems to understand security properly when they decide to add nifty new features. After upgrading to 10.04 from 9.10, I now have a listing of all the user accounts under "Switch from" when I go the the logout menu at the upper right side of the task bar. This is a terrible security hole that should never have been allowed in the first place, and is just as annoying as the default behavior of listing all the user accounts on the login screen.

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Fedora Security :: Guest Accounts And Encryption ?

Mar 22, 2009

I have an encrypted /home partition but would like to set up a guest account for my brother. Obviously, encryption doesn't work so well when you give out the key so what I'd like to do is specify a different, unencrypted location as a home directory for the guest account so he doesn't need access to that partition. Is there a way of doing this?

I've got fedora 10, dual boot with windows, 2 hard drives, 1st is NTFS windows. 2nd is split into a swap, ext3 for the OS, and an encrypted partition for /home.

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Fedora Security :: Set Up 2 Root Accounts And Need Both To Be Able To Authenticate?

Nov 20, 2009

fedora 10 and im trying to set up some user accounts on a computer. My current problem is that we set up 2 root accounts and we need both to be able to authenticate. So far this works on the command line but whenever i'm on the GUI it seems that it only allows root to give its password for things. How do i enable the second account to do that as well.as a note, i am doing this for someone else so i have little to no control how this is set up, so please, i am not looking for reasons why this is not a good idea i would just like to figure this out

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General :: Creating New User Accounts / Security?

Feb 21, 2011

I am looking at creating two user accounts for "contract system admins"..These guys will be performing sys admin duties for a sever -- however, I am still concerned about security of data. For example, the server contains password information for our database, etc.Besides making them sign an NDA, etc. what other security mechanisms could I put in place to ensure that they don't just go buck wild. For example, when someone makes a sudo command, is this logged?

what are some recommendations for general security practices?

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Security :: Authentication - Use AD Sys Accounts To Logon To Servers

Mar 3, 2010

I want to use AD sys accounts to logon to linux servers. What is the best and most secure way to do this. This because we want to ensure it is tracable when a server administrator makes changes to a linux server. Now we use root to make changes to the servers.

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Fedora Security :: Add & Delete User Accounts Script?

Sep 25, 2009

way to automate adding and removing users from 10 different Fedora 7 servers. We use them as print servers and our users have a user name and password to authenticate with when printing. We also use Samba to talk to a W2k3 server that tracks and charges the users for what they print. The set up was done by a vendor and after 6 months of being in production the scripts they created has flaws.

I need a way for a script to run as often as possible that will remove, change, or delete user accounts from the servers and from Samba. how to most effectively achieve this?

It would be ideal to have a file that gets written to when a change needs to be made then a script to make these changes?

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Fedora Security :: Few User Accounts Created - Cannot Be Deleted?

Jan 1, 2011

My Linux is Fedora release 13. I found there are a few users created not by me. I am not sure if the system got hacked somehow. Then the hackers created these users, i.e. (1) oracle, (2) exim, (3) test, (4) cox. I tried to delete all of these four users by using "usrdel" command but the system said "I cannot delete these users as the users are logging in". If my system got hacked ?? or these users are created by the system itself?

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Security :: Force Password To 15 Characters On A Selected Accounts?

Apr 5, 2010

I would like to restrict a few selected accounts to minimum of 15 characters passwords. Other accounts,however, should still be able to login with 8 character passwords. This is in RHEL 5. Does anyone know how to go about it? I have checked PAM documentation and pam_cracklib.so has an option minlen. As per its documentation, minlen can force users to use 15 characters, but it forces every account on the system. I might be wrong too.

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Security :: Lock User Accounts After Too Many Login Failures?

Jun 8, 2010

I am trying to disable accounts after 5 unsuccessful login attempts. I am following the guidelines in this article:

[URL]

This is on an Oracle Enterprise 5.4 box, which is essentially RHEL 5.4 Here is what my /etc/pam.d/system-auth looks like:

--------
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.

[code]....

Unfortunately, the account does not seem to be locked or disabled. As root, runninng 'su test2 -c <some-command>' always sucessfully runs <some-command>, and leaves the failed attempt count at 6. /etc/shadow does not have an * or ! anywhere in the encrypted password for the 'test1' user.

What am I doing wrong? I thought that with the max attempts set to 0 in faillog, that the deny= parameter would be used. I thought I should be using su <user> -c <command> from the root account to test if the disable feature is working.

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Security :: Block User Accounts Who Has Not Logged In To The Server Last 2 Months?

Mar 1, 2011

We have 4 servers having rhel 5.2. We have several users logged in on one of them. We have nis server/client running on them and have common home area mounted on all of them. Now we want to disable/block the accounts of the users who have not accessed our servers in last 2 months from today.What logic should we apply to do so? We were checking stat of .bashrc of each user but is not correct logic. We are going to write shell script for the same. We dont want to do anything in users home area or their files.

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Ubuntu Security :: Www-data Security Permissions?

Mar 17, 2010

I'm running Apache2 under uBuntu 9.10. My problem is that I use my own user "wavesailor" to work on my websites. I kept all my sites under /var/www and I set up the security of the directory after following the guidelines.

Code:
sudo chown -R root:root /var/www
sudo chown -R www-data:www-data /var/www/*

[code]...

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Ubuntu Security :: No Permissions In /var/www?

Jul 24, 2010

I just installed Ubuntu workstation into VMware and then installed Apache, Mysql, PHP, and phpmyadmin.I am able to access Apache from any computer in my home so there is not issue there.The issue I am facing is when I try to copy anything into /var/www/ I get a permission denied messsage.I added myself to the administrators group and then rebooted but still get the same message.

I was able to access it by using the following command...gksu nautilus.I don't want to have to do that every time. I would like to be able to access it by just opening "Documents" and the selecting "file system" inside of Nautilus.

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Ubuntu Security :: How To Truly Replace All Permissions For Mac HD

Apr 7, 2010

I am not putting lnux on my mac, so I don't think it goes in the Apple section and Security is the closest I could find regarding file permissions, so excuse me if I am in the wrong area for this question. I need to back up my macbook (OSX) data. I do not have another mac nor do my friendsw.. I do have a PC running ubuntu 9 though. So I hook it up and can see it, but all the document are locked and I dont have permissions.... now with windows I know how to take over permissions, I have looked online and the closest I found is using the temporary root user command to view all locked files but that gets me to about 25% my data.

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Ubuntu Security :: File Access Permissions

Mar 3, 2010

I am setting up a new ubuntu server, and I am quite new to linux. This server will be used as code repository for a project I am going to be working on. I plan to setup 3 groups for users: dev, test, doc

- for various developers, testers and documentation users.

I would like to setup the following permissions on the main code repository directory:

dev - write permission
test - execute permission
doc - read permission
public (anyone outside these groups) - deny all access

I am unsure what chmod setting to use, or if this is even possible in ubuntu.

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Ubuntu Security :: Setting Permissions For Www User Only?

Mar 19, 2010

I wanna make a small web server for local use , I've installed apache, every thing works fine I'm the root

I wanna protect the folder that contain the htdocs files (www), i don't want any users that not in root group to access (not even read)

I changed the permission of the htdocs folder as next

Owner: www (apache user)
per: creat , delete
group: root
per: creat , delete
other: none

it only works on the main folder that i changed its permissions ! not all sub folders and files ! were my steps right ? and are their anyway to change all folders and files at once ?

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Ubuntu Security :: Removing Permissions From New User?

Apr 8, 2010

I just added a new user to my ubuntu:

sudo adduser james

When james logs in he access his folder BUT he can also access other user's folders. How can I prevent his access to others? I wish to restrict his account to his folder only (he can read/write).

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Ubuntu Security :: Set Permissions For NEW Files And Folders

Mar 14, 2011

I have a shared partition on Ubuntu, 'dm-6', if I create a new folder in it, it has 'teocomi' as owner.If I create the folder from another (windows) PC the owner is 'nobody' and from Ubuntu I have to chmod/chown it in oredr to edit its content...Is there a way to set automatically permission and owner for newly created folders and directories?

I tryed with:

Code:

sudo chmod u+s -R /media/dm-6

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Ubuntu Security :: Vim Ignores File Permissions

Mar 24, 2011

How is possible, that vim can write to file and changes his ownerchip ?

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Ubuntu Security :: How To Change Permissions To Allow EXE And JAR Files

Apr 4, 2011

I've been using Ubuntu for a few years and I am having issues trying to load .jar files and .exe files in Wine. I keep getting an error message that says my computer doesn't have permission to load these files. I've done some research and found people saying to enable the file as executable in the files properties, to enable executable in the permissions folder, and to allow source code on the Ubuntu Software screen, but whenever I try to check these boxes, they immediately revert to having a line through them instead. I remember when I was running Ubuntu a few years ago I was able to completely disable this restriction in terminal, but I can't remember what I did.

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Ubuntu Security :: File Permissions With Apache

Jul 6, 2011

I know how to assign file permissions and other tasks like user to group, but I'm stuck with a situation in how I should set up my system.So I have a LAMP server set up. I'm not the only developer so I created a group called "developers" for my other users "Mike," "Alex," and "Cindy," which are developers (I'm Mike by the way). I know that "www-data" is the user and group Apache uses.This is good because only I have permission to update the production site, but for the dev site, it's a different story.

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Ubuntu Security :: How Secure Are The Default File Permissions

Feb 5, 2010

What do the default file permissions in ubuntu 9.10 protect/deny access to?

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Ubuntu Security :: Remove Delete Permissions On Certain Folders?

Feb 8, 2010

I have a Ubuntu file server with a mix of 30+ users ( mix of windows and linux ).All are members of the same group. All need read write create access. I want to prevent deletion of certain key folders. How can I achieve this ? sudo chmod -R nnnn ??

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Ubuntu Security :: Tight Guest Permissions Setting

Feb 23, 2010

one thing i can't seem to be able to do is give the guest account just these permissions: using firefox (or other browser) and using one file directory and using a text editor. means the guest can browse the net and sefe some infos form that - nothing more. the previous version had something like that, it was really easy for me, a noob, to do it with two or three clicks. if this possibiility exists, what to do. if it's not implemented... maybe it should be. 'cause many people let others use the computer but don't want any complications...

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Ubuntu Security :: File Permissions In Live Session CD

May 9, 2010

I have broken my MBR and can now only enter 9.10 with the ubuntu start up cd.when i boot through he ubuntu live cd.I can see my mounted drive with all my files however i do not have the permissions to open or copy some of my files( music, films, pics) . id like to do this so i can transfer all my files to an external HDD and reformat start all over again.error when trying to open files.You do not have the permissions necessary to view the contents of.

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Ubuntu Security :: HD Attack Into APT Manager And Folder Permissions

May 24, 2010

I may not be a code worrior, yet I have been a Ubuntu convert from Apple for about 3yrs now. Since 1984-2006 now hackers or viruses. And Until now Ubuntu has been clean, well I have been good with repos, etc.

1. Recently I found "Odd" behavior with my Amarok 1.4 player, ffmpeg, winff.

2. During a Synaptic upgrade there were some "unauthorized changes". I have seen this before due to some of my software, so I ignored it. . .

To my bewilderment, "It" erased Amarok 1.4 player, ffmpeg, winff, all image kernels, claimed domain over my system permissions, and external HD. B4 I shutdown, downloaded LUCID 10.4. . . restarted, then copied over all info possible to minimize a complete delete of my system. Upon restart, indeed all kernel images were gone, Only live CD allowed me access to repartition my HD.

NOW. I have Lucid running, and have been denied access to my external HD and partitioned (internal HD). I used Nautilus to copy over files to my internal laptop HD, yet permissions continue to be an issue. The INFECTED FOLDERS are owned by "User 999-user#999. I must micro manage every folder and file to gain "partial permission". The dialog box stutters and never allows me to go down to "Root"

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Ubuntu Security :: Understanding Unix Style Permissions

Jul 20, 2010

On Windows, you can go to a file's permissions and it's clearly stated who can do what. You can choose between individual users or groups such as 'everyone' or certain types of users such as 'domain users'. You could create a clear cut list of every single user/group on the system and what their permissions for a file are and have it neatly displayed in a list.On Unix, we have octal permissions and sticky bits. I understand the whole concept of rwxrwxrwx (777). The first three are what the file owner can do, the second is what the main group the user belongs to can do, and the third is what other users can do.

But, when you view a file's permissions you are only getting the permissions as they apply to the user that owns the file. For example, as I understand it, if I viewed a file that only the root user had rwx permissions on and everyone else could only read. The permissions would show up as rwxr--r-- (744). But, those same permissions would show up to any user as 744 as well. Since the last 3 characters are what applies to "other users" (pretty vague). How would someone know what users in particular those permissions apply to? There could be one "other user" that can rwx that file and another "other user" that can't.Also, why just stop with the main group? What about other groups? A the user Foo's main group he belongs to might be Foo. But he could also belong to the groups Boo and Zoo, which belong to other users and would give him full rwx permissions over Boo and Zoo's files just as if he were Boo or Zoo.

Then you have the whole sticky bit thing that makes it so that files can be owned by the same person and at the same time be made use of (to varying degrees) by other users. To chmod the UID you'd chmod 2777 or for GID 4777 (just an an example). I did this for a file and it allowed a standard user account who was previously unable to run the command to be able to run it. But, how can that work when I didn't anywhere specify what particular user (or groups of users) that sticky bit applies to?

I'm confused about this whole thing to the point that I'm not even sure exactly what questions I should be asking or even if my examples are even 100% correct. I just sort of ranted about some specific things that floated to the top of my head. Permissions are easy to understand when your running a Unix-like system on a single user desktop. Because the only users/groups you have are root, the single user, and various system users/groups that you don't really need to worry about. So a file with rwxr--r-- means that only the Root user (not even members of his group) can edit the file and you can't unless you use sudo. Because the "other user" in the last 3 characters always just means you. But, things seem to get a whole lot more complicated when you start adding in multiple users. Can someone explain this or link to a "for dummies" article that can explain all of this to me in a way that someone who's used to Windows style permissions can make a connection between the two OS families and their way of handling these things?

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