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LS-09EN. OS Permissions. SUID/SGID/Sticky. Extended Attributes
Operating Systems LS-09. OS Permissions. SUID/SGID/Sticky. Extended Attributes. Operating System Concepts 1.1 ys©2019 Linux/UNIX Security Basics Agenda ! UID ! GID ! Superuser ! File Permissions ! Umask ! RUID/EUID, RGID/EGID ! SUID, SGID, Sticky bits ! File Extended Attributes ! Mount/umount ! Windows Permissions ! File Systems Restriction Operating System Concepts 1.2 ys©2019 Domain Implementation in Linux/UNIX ! Two types domain (subjects) groups ! User Domains = User ID (UID>0) or User Group ID (GID>0) ! Superuser Domains = Root ID (UID=0) or Root Group ID (root can do everything, GID=0) ! Domain switch accomplished via file system. ! Each file has associated with it a domain bit (SetUID bit = SUID bit). ! When file is executed and SUID=on, then Effective UID is set to Owner of the file being executed. When execution completes Efective UID is reset to Real UID. ! Each subject (process) and object (file, socket,etc) has a 16-bit UID. ! Each object also has a 16-bit GID and each subject has one or more GIDs. ! Objects have access control lists that specify read, write, and execute permissions for user, group, and world. Operating System Concepts 1.3 ys©2019 Subjects and Objects Subjects = processes Objects = files (regular, directory, (Effective UID, EGID) devices /dev, ram /proc) RUID (EUID) Owner permissions (UID) RGID-main (EGID) Group Owner permissions (GID) +RGID-list Others RUID, RGID Others ID permissions Operating System Concepts 1.4 ys©2019 The Superuser (root) • Almost every Unix system comes with a special user in the /etc/passwd file with a UID=0. This user is known as the superuser and is normally given the username root. -
Acronis True Image Free Download Acronis True Image Free Download
acronis true image free download Acronis true image free download. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. Cloudflare Ray ID: 67e39bad5f34f210 • Your IP : 188.246.226.140 • Performance & security by Cloudflare. Acronis True Image 2021 ISO Bootable Download. Acronis True Image 2021 is a backup software which ensures your entire PC security. You have to install this program just in case your PC doesn’t boot and you want to recover data now. In fact, It can backup photos, email, and selected partitions. Additionally, It can protect your entire disk drive applications, operating system, settings and all data you have. Real-time Backup and Restore. You will get a bunch of tools in here. It lets you know how to build a rescue media indeed. In case of fatal crash rescue media Tool helps to restore your system. In fact, The best opportunity in Acronis True Image 2021 ISO is the universal restore. It provides backups specifically Incremental, Image-Based, NAS, Server, Hybrid, Mobile Device and many more. -
Free Dmin Password Download Windows 10 3 Ways on How to Crack Administrator Password on Windows 10/8/7/XP
free dmin password download windows 10 3 Ways on How to Crack Administrator Password on Windows 10/8/7/XP. Password is a very important security feature that lets you protect your important files from unauthorized users. If you have multiple accounts on your computer, then your administrator account will be the main account. To stop unauthorized users from gaining access to your important files, you would have likely set up a password to your administrator account. But what happens when you forget your administrator account password. You get a computer in which you can't go to the desktop or access your files. When you want to crack administrator password , then you will need the tricks to crack your administrator account password so that you can get access to your computer. Part 1. How to Crack Administrator Password Using CMD Part 2. Crack Administrator Password on Windows with Software Part 3. How to Crack Administrator Password Without Software. Part 1. How to Crack Administrator Password Using CMD. CMD or command prompt is an administrative tool in the Windows operating system. The command prompt is a command line tool that looks like MS-DOS and thus can be difficult to use for beginners. You can use various commands and utilities in command prompt to fix various system errors and issues. So it is no wonder that it can help crack administrator password. What you need for operating CMD is a little bit of skill and knowledge of the right commands. Command prompt not really shows you the old password, instead lets you reset the password. -
Cyber Security Manual V1.0.Pdf
St. Angelo‘s Professional Education Lab Manual v1.0 Contributing Authors: Rajesh Vishwakarma Vinod Singh Satish Jha Lalit Jha 1 St. Angelo‘s Professional Education Lab Manual v1.0 Table of Contents Program Overview ............................................................................................................................ 5 What is penetration testing? ........................................................................................................ 5 Objectives ..................................................................................................................................... 5 Pre-requisites ............................................................................................................................... 5 Course Contents ........................................................................................................................... 6 Module One: Art of Hacking ..................................................................................................... 6 Module Two: Scenario of Enterprise security .......................................................................... 6 Module Three: Planning and gathering Information................................................................ 6 Module Four: Social Engineering .............................................................................................. 6 Module Five: Taking on the system .......................................................................................... 7 Module Six: Attacking passwords -
Sistemas De Archivos
Sistemas de archivos Gunnar Wolf IIEc-UNAM Esteban Ruiz CIFASIS-UNR Federico Bergero CIFASIS-UNR Erwin Meza UNICAUCA Índice 1. Plasmando la estructura en el dispositivo1 1.1. Conceptos para la organización...................2 1.2. Diferentes sistemas de archivos...................4 1.3. El volumen..............................4 1.4. El directorio y los i-nodos......................6 1.5. Compresión y desduplicación .................... 11 2. Esquemas de asignación de espacio 14 2.1. Asignación contigua......................... 14 2.2. Asignación ligada........................... 15 2.3. Asignación indexada......................... 16 2.4. Las tablas en FAT.......................... 18 3. Fallos y recuperación 20 3.1. Datos y metadatos.......................... 22 3.2. Vericación de la integridad..................... 22 3.3. Actualizaciones suaves (soft updates)................ 23 3.4. Sistemas de archivo con bitácora (journaling le systems).... 24 3.5. Sistemas de archivos estructurados en bitácora (log-structured le systems)................................ 25 4. Otros recursos 26 1. Plasmando la estructura en el dispositivo A lo largo del capítulo ?? se presentaron los elementos del sistema de archivos tal como son presentados al usuario nal, sin entrar en detalles respecto a cómo organiza toda esta información el sistema operativo en un dispositivo persistente 1 Mencionamos algunas estructuras base, pero dejándolas explícitamente pen- dientes de denición. En este capítulo se tratarán las principales estructuras y mecanismos empleados -
Acronis True Image for Western Digital
Acronis True Image for Western Digital USER GUIDE Table of contents 1 Introduction ....................................................................................................................5 1.1 What is Acronis True Image for Western Digital? ..................................................................... 5 1.2 Backups created in Acronis True Image ..................................................................................... 5 1.3 System requirements and supported media ............................................................................. 6 1.3.1 Minimum system requirements .................................................................................................................... 6 1.3.2 Supported operating systems ........................................................................................................................ 7 1.3.3 Backing up all data on your PC ....................................................................................................................... 7 1.3.4 Supported file systems .................................................................................................................................... 8 1.3.5 Supported storage media ............................................................................................................................... 8 1.4 Installing Acronis True Image for Western Digital ..................................................................... 9 1.5 Activating Acronis True Image for Western Digital .................................................................10 -
Local Password Exploitation Class
Adrian Crenshaw http://Irongeek.com I run Irongeek.com I have an interest in InfoSec education I don’t know everything - I’m just a geek with time on my hands Regular on: http://www.isd-podcast.com/ http://Irongeek.com Pulling stored passwords from web browsers/IM clients and other apps Hash cracking of Windows passwords, as well as other systems Sniffing plain text passwords off the network How passwords on one box can be used to worm though other hosts on a network Hope it get’s you thinking. Exploits are temporary, bad design decisions are forever. http://Irongeek.com There are several reasons why an attacker may want to find local passwords: To escalate privileges on the local host (install games, sniffers, key stroke catchers and other software or just to bypass restrictions). Local passwords can be used to gain access to other systems on the network. Admins may reuse the same usernames and passwords on other network hosts (more than likely if they use hard drive imaging). Similar themes are also often used for password selection. Just for the fun of doing it. http://Irongeek.com Does not organize well, but you need to have these factoids in the back of your head for later. http://Irongeek.com Imaged Systems Uses it on other systems Repeat ad nauseum Attacker grabs local password on one box Grabs passwords from other systems, and installs keyloggers/sniffers to get network credentials for http://Irongeek.com more systems Target Audience: Workstation Installers, System Admins, Security Folk and General Gear-heads. -
Acronis® Disk Director® 12 User's Guide
User Guide Copyright Statement Copyright © Acronis International GmbH, 2002-2015. All rights reserved. "Acronis", "Acronis Compute with Confidence", "Acronis Recovery Manager", "Acronis Secure Zone", Acronis True Image, Acronis Try&Decide, and the Acronis logo are trademarks of Acronis International GmbH. Linux is a registered trademark of Linus Torvalds. VMware and VMware Ready are trademarks and/or registered trademarks of VMware, Inc. in the United States and/or other jurisdictions. Windows and MS-DOS are registered trademarks of Microsoft Corporation. All other trademarks and copyrights referred to are the property of their respective owners. Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. Distribution of this work or derivative work in any standard (paper) book form for commercial purposes is prohibited unless prior permission is obtained from the copyright holder. DOCUMENTATION IS PROVIDED "AS IS" AND ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID. Third party code may be provided with the Software and/or Service. The license terms for such third-parties are detailed in the license.txt file located in the root installation directory. You can always find the latest up-to-date list of the third party code and the associated license terms used with the Software and/or Service at http://kb.acronis.com/content/7696 Acronis patented technologies Technologies, used in this product, are covered and protected by one or more U.S. -
Wikipedia: Design of the FAT File System
Design of the FAT file system A FAT file system is a specific type of computer file system architecture and FAT a family of industry-standard file systems utilizing it. Developer(s) Microsoft, SCP, IBM, [3] The FAT file system is a legacy file system which is simple and robust. It Compaq, Digital offers good performance even in very light-weight implementations, but Research, Novell, cannot deliver the same performance, reliability and scalability as some Caldera modern file systems. It is, however, supported for compatibility reasons by Full name File Allocation Table: nearly all currently developed operating systems for personal computers and FAT12 (12- many home computers, mobile devices and embedded systems, and thus is a bit version), well suited format for data exchange between computers and devices of almost FAT16 (16- any type and age from 1981 through the present. bit versions), Originally designed in 1977 for use on floppy disks, FAT was soon adapted and FAT32 (32-bit version used almost universally on hard disks throughout the DOS and Windows 9x with 28 bits used), eras for two decades. Today, FAT file systems are still commonly found on exFAT (64- floppy disks, USB sticks, flash and other solid-state memory cards and bit versions) modules, and many portable and embedded devices. DCF implements FAT as Introduced 1977 (Standalone the standard file system for digital cameras since 1998.[4] FAT is also utilized Disk BASIC-80) for the EFI system partition (partition type 0xEF) in the boot stage of EFI- FAT12: August 1980 compliant computers. (SCP QDOS) FAT16: August 1984 For floppy disks, FAT has been standardized as ECMA-107[5] and (IBM PC DOS 3.0) ISO/IEC 9293:1994[6] (superseding ISO 9293:1987[7]). -
I. ELECTRONIC DISCOVERY: DEFINITIONS and USES A. What
I. ELECTRONIC DISCOVERY: DEFINITIONS AND USES A. What Is Electronic Discovery? Electronic discovery includes requests for and production of information that is stored in digital form.1 In short, electronic discovery is the discovery of electronic documents and data.2 Electronic documents include virtually anything that is stored on a computer such as e-mail, web pages, word processing files, and computer databases.3 Electronic records can be found on a wide variety of devices such as desktop and laptop computers, network servers, personal digital assistants and digital phones.4 Documents and data are "electronic" if they exist in a medium that can only be read by using computers such as cache memory, magnetic disks (for example computer hard drives or floppy disks), optical disks (for example DVDs or CDs), and magnetic tapes.5 Electronic discovery is frequently distinguished from traditional "paper discovery," which is the discovery of writings on paper that can be read without the assistance of computers.6 B. Why E-Discovery Can Be Valuable in Litigation With the advancement of technology, electronic discovery is not only valuable in litigation, it is essential. Electronic evidence is affecting virtually every investigation today whether it is criminal or civil.7 Usually, there are no longer "paper- trails" that establish who did what and when.8 Instead, electronic evidence is providing the clues to understanding what actually happened.9 Consider these statistics regarding the electronic evidence explosion: · "In 2002, the International Data Corporation estimated that 31 billion e-mails were sent daily. This number is expected to grow to 60 billion a day by 2006. -
Diskgenius User Guide (PDF)
www.diskgenius.com DiskGenius® User Guide The information in this document is subject to change without notice. This document is not warranted to be error free. Copyright © 2010-2021 Eassos Ltd. All Rights Reserved 1 / 236 www.diskgenius.com CONTENTS Introduction ................................................................................................................................. 6 Partition Management ............................................................................................................. 6 Create New Partition ........................................................................................................ 6 Active Partition (Mark Partition as Active) .............................................................. 10 Delete Partition ................................................................................................................ 12 Format Partition ............................................................................................................... 14 Hide Partition .................................................................................................................... 15 Modify Partition Parameters ........................................................................................ 17 Resize Partition ................................................................................................................. 20 Split Partition ..................................................................................................................... 23 Extend -
Linux CVM Operation Manualproduct Introduction
Cloud Virtual Machine Linux CVM Operation Manual Product Introduction Linux CVM Operation Manual Product Introduction Copyright Notice ©2013-2017 Tencent Cloud. All rights reserved. Copyright in this document is exclusively owned by Tencent Cloud. You must not reproduce, modify, copy or distribute in any way, in whole or in part, the contents of this document without Tencent Cloud's the prior written consent. Trademark Notice All trademarks associated with Tencent Cloud and its services are owned by Tencent Cloud Computing (Beijing) Company Limited and its affiliated companies. Trademarks of third parties referred to in this document are owned by their respective proprietors. Service Statement This document is intended to provide users with general information about Tencent Cloud's products and services only and does not form part of Tencent Cloud's terms and conditions. Tencent Cloud's products or services are subject to change. Specific products and services and the standards applicable to them are exclusively provided for in Tencent Cloud's applicable terms and conditions. ©2013-2017 Tencent Cloud. All rights reserved. Page 2 of 61 Linux CVM Operation Manual Product Introduction Contents Documentation Legal Notice ............................................................................................................................................ 2 Linux CVM Operation Manual ........................................................................................................................................... 4 Mounting Data