Ubuntu Security :: HD Crashed, No Boot, Some Sectors Read, Access Secure Files?

Jun 17, 2011

I was running a 2-partition hard drive, Windows Vista (lamentably) on one partition, and the other running Ubuntu. I began having trouble with the Vista partition, so I attempted to move as many of the files that I really wanted to keep as possible over to the Ubuntu partition, and then reformat and reinstall the Vista partition. As a result, I could no longer boot to Ubuntu, and I consistently got errors back from everything that I tried on the Vista partition.

The only way that I can now access anything on the hard drive is to insert the Ubuntu install disk, go into trial mode, then mount the partition. At long last, here is the problem: Is there anyway to possibly make the partition bootable again so that I could burn the files to a disk? From trial mode I can get to a number of the files on the mounted partition, HOWEVER, they are secured with the username and password of my user account on that partition. Is there any way that I can access the files from the trial mode by entering my username/password?

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Ubuntu Security :: Read/write Access To MP3 Files In /usr/Music?

May 2, 2011

I had to reinstall Ubuntu (Natty) on a brand new computer and while installing I setup the datas partition to be mounted in /usr but now I can't have access to files I put in there even if I setup the group/user permission! I can accezz /usr/Music but all files are locked

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Ubuntu Security :: Secure Delete/Shred Files And Folder?

Jun 27, 2010

I don't use the Trash bin because it does not really delete things,speaking from a security point Instead, I gotten used to 'shred' and 'secure-delete' .But to move around files, cut-n-paste is very handy.And I was wandering if items from the Clip get stored somewhere ?i realize that they get overwritten again and again in the clipboard but do they also get stored somewhere else?

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Fedora :: Access Files Remotely But Remain Secure?

Mar 15, 2010

I would like to be able to access my data file that reside on my Linux machine at home from the Internet but I don't want to open any "doors" for lack of a better word that will compromise the security of my files. I am running F11 and I am using cable broadband and a Linksys router.I have been able to get ssh working with OpenSSH while I am at home but I don't really need or want to ssh remotely, I would rather setup what I think is called an ftp. I just want to be able to up and download files to my Linux machine.

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Ubuntu Security :: Secure-delete Won't Work On Larger Files / Sort It?

Sep 16, 2010

I'm trying to clean a hard drive and I'm using secure-delete but it just stands there and takes cpu power but nothing happens, I used -r switch first and nothing, so I tried it on single files, small pictures worked as intended but a simple 50MB MPG file just stands there as well and nothing happens.

I left it running for 24 hours and nothing happened but the cpu was working at 90-100% all the time :/

Any one know what's wrong? I'm using 10.04 UNR

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Ubuntu Installation :: Crypt Keeper On Natty Narwhal - Unable To Access Secure Files?

May 13, 2011

After upgrading to Natty Narwhal my Crypt Keeper app will not launch. I am now unable to access secure files. Has anyone had this issue after their upgrade to Natty Narwhal? If so, How were able to resolve this issue.

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Security :: Ways To Secure Sendmail Or Secure Alternatives To Send Mail

Dec 1, 2010

I'm an Oracle DBA and started working for my current employer about 4 months ago. This past weekend an alert re: FS space brought my attention to /var/spool/clientmqueue (full of mail re: cron jobs) and the fact that sendmail is not running on our Linux servers.I'm told that the IT security team deemed sendmail too vulnerable so we don't run it.Aside from FS filling up and missing notification of issues with crontab entries, I'm concerned that we may be missing notification of potential issues. In other Unix/Linux environments I've seen emails from the print daemon when it experienced problems with specific jobs.

Are there other Linux facilities aside from cron and lpd that use email to advise the users of possible issues? Are there ways to secure sendmail or secure alternatives to sendmail? My primary need/desire is to make sure that emails regarding issues on the server get to the appropriate users. Secondary goal would be to have the ability to use mailx to send mail out. There is No need/desire to receive mail from outside.

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Security :: Get Root Through TR069 And Read Access?

Jul 13, 2010

I have an ADSL modem and router, its OS is linux. It runs ftp service, and I can read files in its file system, but I have no permission to list files and to write files. It has TR069 protocol connections and can upgrade remotely.It has ssh, but not started.

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Security :: Using Sudo To Give Read Access To Specific Directory?

Apr 29, 2011

I have a log server that collects logs from all the cisco devices on our network.he company policy states that any logs should only be accessible by root. So I have the following permissions set on the directory, as well as everything inside the directory where the cisco logs are kept.

Code:
drwx------ 65 root root 4096 Apr 29 7:38 rsyslog
The cisco folks are requesting access to these logs, which is allowed by company policy.

[code]...

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Ubuntu Security :: All Files And Folders Are Read Only?

Sep 6, 2010

I've recently upgraded to 10.04 and have noticed that all the files or folders I've been creating recently are read only. I can manipulate the folders on my ubuntu system itself and create new entries, folderes, subfolders, and save files. IE a payment receipt in pdf format. However if I then try to move or copy any of these to my DROBO (data storage device) the file gets the LOCK Icon on it and becomes read only. If it is a subfolder I can no longer copy to it and if it's a regular file, say a pdf or flv I can't modify it. Attempting to change the file permissions on either my ubuntu desktop or any other folder works but once it goes to the drobo I lose the ability to change it off of ---. Again, this was all working fine before doing the upgrade to 10.04. Yes I did do a clean install to 10.04.

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Ubuntu :: Code To Access Hard Disk Sectors (LoopBack Device)

Jan 26, 2011

I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it has the following configuration.

Code: $> sudo fdisk -l /dev/loop0
Disk /dev/loop0: 10 MB, 10977280 bytes
255 heads, 63 sectors/track, 1 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/loop0 doesn't contain a valid partition table Now what I want to do is develop a c++ program to read & write files to this loop back device,which I'm using to simulate an actual hard disk,at the blocks & sectors level. So far I've come up with the following code. But I'm still unable to read files from the hard disk one block at a time.

Code: #include <iostream>
#include <stdio.h>
using namespace std;
int main() {
char block[512]; int length=0;
cout<<"Implementation of the File Handler Read Method..."<<endl;
FILE *f = fopen("/dev/loop0", "r");
if(f == NULL) {
cout<<"Error In Opening the HardDisk File Retuning Error..."<<endl; return -1; }
//Read One Block of Data to Buffer length = fread(block, 1, sizeof(block), f);
/* Do something with the data */ cout<<"Length : "<<length<<endl;
return 0; }

When I run this Program All what I get is the message for NULL. "Error In Opening the HardDisk File Retuning Error...". So I could open the loopback device as a file an access it at the sectors & block level.

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OpenSUSE Install :: View/access/read The Files From Data Partition?

Dec 1, 2010

I am a total noob when it comes to opensuse. I just read the reviews and comments from forums taht's why I wanna try this alternative. I have 1 physical drive that has two partitions. 1 is dedicated for my windows OS (20 GB) and the other for my data (approx. 100GB).

How can I install opensuse 11.3 to just 1 partition (20GB) and leave my data partition (approx. 100GB) as it is? Can I still view/access/read the files from my data partition after I have successfully install opensuse 11.3 to my Os partition?

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Fedora Servers :: Cannot Start Apache - No Read / Write Access To HTTP Files

Jan 14, 2009

I am trying to setup my webserver and I am trying to make a website to run under suexec but somehow I cannot start my apache it directly fails and SELinux is giving me errors and don't really know what to do with it, it is giving me some command to type but not sure if this will make my server less secure. The SELinux error is as follow:

Code:
Summary:
SELinux prevented httpd reading and writing access to http files.

Detailed Description:
SELinux prevented httpd reading and writing access to http files. Ordinarily httpd is allowed full access to all files labeled with http file context. This machine has a tightened security policy with the httpd_unified turned off, this requires explicit labeling of all files. If a file is a cgi script it needs to be labeled with httpd_TYPE_script_exec_t in order to be executed. If it is read-only content, it needs to be labeled httpd_TYPE_content_t, it is writable content. it needs to be labeled httpd_TYPE_script_rw_t or httpd_TYPE_script_ra_t. You can use the chcon command to change these contexts. Please refer to the man page "man httpd_selinux" or FAQ [URL] "TYPE" refers to one of "sys", "user" or "staff" or potentially other script types.

Allowing Access:
Changing the "httpd_unified" boolean to true will allow this access: "setsebool
-P httpd_unified=1"

Fix Command:
setsebool -P httpd_unified=1

I will write down how I did setup my server so maybe you can see a mistake I did. First I changed my Apache httpd.conf I added the following to it:
Code:
NameVirtualHost 192.168.1.2:80
<VirtualHost 192.168.1.2:80>
ServerName localhost
DocumentRoot /var/www/html
DirectoryIndex index.html index.html index.shtml index.php
</VirtualHost>

<VirtualHost 192.168.1.2:80>
SuexecUserGroup ulyaoth ulyaoth
ServerAdmin webmaster@ulyaoth.org
ServerName test.ulyaoth.org
DocumentRoot /var/www/ulyaoth/www/html
ErrorLog /var/www/ulyaoth/logs/error_log
CustomLog /var/www/ulyaoth/logs/access_log common
DirectoryIndex index.html index.htm index.shtml index.php
ScriptAlias /cgi-bin/ /var/www/ulyaoth/www/cgi-bin/
<Directory /var/www/ulyaoth/www/cgi-bin/>
AllowOverride none
Order allow,deny
Allow from all
Options +execCGI
AddHandler cgi-script .cgi .pl
</Directory>
</VirtualHost>

Then I created the username "ulyaoth" with the group "ulyaoth" as I specified with my suexec, then I created all the directories as specified in my httpd.conf and "chown ulyaoth:ulyaoth (dirname)" them to the right group and username.

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Ubuntu Servers :: Samba - Access The Shares But Read-only And Unable To Delete / Modify Files Using The IMacs

Sep 2, 2010

I have a few ubuntu servers which have samba shares on the network and for the most part have had little trouble with them. Recently we purchased a few iMac's for one of our deptartments and, while we're able to access the shares, all the files on them are read-only and we are unable to delete/modify files using the iMacs. This is not an issue with any of our windows machines (W2K, WinXP, Vista).

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Ubuntu :: Hard Drive Read Only After Backup Crashed

Mar 13, 2010

I was busy making backups to my external hard drive just now, but Ubuntu crashed 10 mins into the backups. After rebooting the affected folders are now Read only, and I cannot add or remove anything. This is extremely annoying, I already threw away two USB flash disks because the same thing happened to me in the past. I don't want to throw away the external because it's far more expensive and packed with backups.

Symptoms: I can write or delete a file to the hard drive, in any folder, accept the folders that was being accessed when the computer crashed. I have tried to change permissions, but I get an error. I tried opening a terminal and sudo rm -r that folder, but I get a input/output error. I'm running Karmic. Backups were made by Back-in-time.

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Security :: Users Can Access Each Others Files?

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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Security :: Missing A Secure.log Or Security.log File

Jul 11, 2010

I seem to be missing a secure.log or security.log file. I have Ubuntu 10.04 and can't find this file. I looked in the /var/log and ran a search command to no avail. Does anyone know where this file is or is it called something else. I'm looking for a file that logs any change to the security settings of the system.

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Fedora Security :: MLS - Categories And Access To Files?

Apr 7, 2010

I have 2 users: carol, carol2 and 2 files in /: filea, fileb. I want to carol has access only to filea and carol2 only to fileb. I need to do this with MLS (range). I dont want do this with levels because user that is higher has access to both files. How to do that?

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Security :: Call Access Out Side Chroot Jail Files From Apache?

Apr 2, 2010

I have one requirement i.e I want to call the java file from the php function using shell_exec command , i am using the chroot jail concept , if i using this command i am getting the empty file because java environment is outside the chroot jail,so how to access the the files those are out side the chroot jail.

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Security :: Set Permissions For Multiple Groups To Have Different Levels Of Access To One Group Of Files?

Feb 5, 2010

I am setting up a samba server to operate in a windows AD domain. I want to set permissions for multiple groups to have different levels of access to one group of files, and it looks to me like unix permissions will not do that? I always hear about how robust linux is, and it seems to me that their file permissions model is WEAK compared to microsoft's?

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Security :: Access Dom0 Files During Vsftpd Server From DomU During Ftp Client

Aug 24, 2010

I have CentOS 5.5 distribution with Dom0 and DomU installed. I try to access Dom0 files during vsftpd server from DomU during ftp client. I successfully login with root and simple user, but when I try to list (or cd to some directory) in user home the SELinux prevent it from me. I get this in audit.log:

[Code]....

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Ubuntu Security :: 10.04 System Just Crashed For 'no Reason'

Jan 7, 2011

My 10.04 system just crashed for 'no reason' .

Looking through the system logs the rtkit daemon was started up a bout a minute before the crash. Is there a better place to see if my system has been compromised? What should I look for?

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Ubuntu Security :: Torrented Movie Crashed The Laptop?

Oct 18, 2010

i'v recently downloaded a torrent file which happened to be a fake movie. it gave me a message stating i need coreplayer to run it and directed me to [URL].the file was an obvious fake because it had the yahoo! logo on it, but right after running it my laptop slowed down to snail-turtle speed and i had to reboot it.as i said i'm not sure whether this is a bug or a security-related threat, i should be fine by just deleting the said file, correct?

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Ubuntu Security :: Better Way To Secure My Server?

Jan 26, 2010

I set up my ubuntu server with iptables that only allows ssh in the input chain (and of course established connections) with only the mac adress of my laptop allowed to connect, set up a key with a long passphrase and installed pam_abl plugin. ICMP echo is blocked by default.

The only problem is i log all other attempts to connect to the server and i see a lot of traffic going to ports 445 and 5900.

My question is: Is there a possibility that these attempts could succeed and is there any way to further ensure this server?

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Ubuntu Security :: OS Which Is More Secure Without Recoding It Yourself?

Feb 11, 2010

A) Pc-bsd

B) Ubuntu

And also which OS is more reliable?

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Ubuntu Security :: How To Secure Grub 2.0

Mar 11, 2010

How can i secure grub 2.0 ? with grub 1 just do : grub-md5-crypt then we write password --md5 <crypted_password> in /boot/grub/menu.lst

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Ubuntu Security :: Possible To Secure Transmission?

May 10, 2010

Is it possible at all to secure transmission?

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Security :: How Secure Is Ubuntu / Firefox

Jun 14, 2010

Newbie here,
I'm thinking of moving mostly to linux to get away from the security holes in Windows. And I have some questions...

How secure is Firefox for doing online banking?

Sometimes I have run into a situation where the bank doesn't support anything but Windows explorer when accessing my accounts. Can this be gotten around safely in Linux?

If so, How?

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Ubuntu Security :: How To Secure Harddisk

Sep 19, 2010

Is there any way to secure harddisk accessbility ? i want encrypt my hard disk, and partitions that ubuntu installed on that. is there a way ? i want deny all access to hard disk, just my own root account can have access to all.

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Ubuntu Security :: Need To Secure My Server

Feb 19, 2011

Ok im new, i know apparmor is running. i was looking for firestarter but their isnt one.....how do i secure this server? i want a good firewall and some virus protection!. also do i need this?

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