How to reset root passwords on rhel 7 and cent os 7 linux systems
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To reset the root password on a Red Hat Enterprise Linux 7 or CentOS 7 system when it is forgotten, one can edit the GRUB bootloader to boot into single-user mode. This allows remounting the root filesystem as read-write, using the passwd command to change the root password, and then remounting read-only before rebooting the server.
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1. The Linux boot process involves six main stages: BIOS, MBR, GRUB, kernel, init, and runlevel programs. BIOS loads the MBR which loads GRUB, GRUB loads the kernel and initrd, the kernel loads init, and init executes programs based on the specified runlevel.
2. Basic Linux commands demonstrated include echo, date, cal, passwd, ls, cat, wc, cp, mv, rm, head, tail, mkdir, cd, pwd, chmod, and commands using pipes, redirection, and variables.
3. The vi editor commands demonstrated are for inserting,RPM (LINUX)
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RPM (RPM Package Manager) is a package management system that can install, uninstall, upgrade, query, and verify software packages. It uses an RPM database to track installed packages and dependencies. RPM forms the basis for the yum package manager. The rpm command can be used to install, query, upgrade, remove packages. It handles dependencies and tracks files and metadata for packages.Samba
SambaMd Shihab
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The document provides instructions for installing and configuring a Samba file sharing server on CentOS 7. It describes installing Samba packages, creating a shared directory, configuring user access, editing configuration files, starting services, adding firewall rules, and connecting from Windows and Linux clients. The key steps are installing Samba packages, configuring shares and permissions in smb.conf, starting smb and nmb services, enabling them to start on boot, and connecting clients to the shared directory.Ubuntu Practice and Configuration
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The document provides instructions for various post-installation configuration exercises on an Ubuntu system, including: getting accustomed to using sudo; creating a new user account called "inst"; learning how to install software; updating the software repository list; installing common development packages; learning how to control services; and configuring the X Window system.Basic linux commands
Basic linux commandsNguyen Vinh
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This document provides an overview of basic file manipulation and system commands in Linux. It explains that the Linux file system is navigated using commands and is rooted at '/'. Directories branch off the root directory. Basic commands like ls, cd, cp, rm, mkdir are described. System commands covered include startx, shutdown, man, and commands for adding users, checking disk space, searching files. It also provides some notes on graphical file managers and editors.Divya
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Linux can be downloaded for free and was created to be an open source version of UNIX; it discusses how to install Linux by booting from a CD-ROM or making installation floppies, and then explains how to configure aspects of Linux like software installation and permissions. The document also provides an overview of common Linux commands for navigating and managing the file system, copying/moving files, and uninstalling a Linux operating system by removing it from the boot loader menu.Divya
Divyadiva23
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Linux can be downloaded for free from the internet with no registration fees or costs. It was created by Linus Torvalds as a freely available version of UNIX. Installing Linux involves checking hardware compatibility, repartitioning disks if needed, and booting from an installation CD or floppy disks. Basic installation kits include README files, boot disk images, and packages for common software. Configuring Linux allows customizing settings like installing additional software repositories. Common Linux commands allow navigating and managing the file system and permissions. Uninstalling Linux mainly involves removing it from the boot loader menu rather than deleting its files.Linux basics 
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This document provides an overview of Linux basics including the kernel, shell, filesystem hierarchy, run levels, and booting procedure. It describes key components like the kernel, shell, init process, and run level programs. It also explains basic commands for file management, text editing, archiving/compression, and system states. Formatting options and common filesystem types are outlined as well. The document is an introductory guide to core Linux concepts, components, and commands.Recently uploaded (20)
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DAO UTokyo 2025 DLT mass adoption case studies IBM Tsuyoshi Hirayama (ƽɽÒã)Tsuyoshi Hirayama
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In session 2, we will introduce you to Data manipulation in UiPath Studio.
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Data Manipulation with Strings in UiPath Studio (v2022.10) 2 modules - 1h 30m - https://academy.uipath.com/courses/data-manipulation-with-strings-in-studio
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Understanding DPIA/PIAs and how to implement them can be the key to embedding privacy in the heart of your organization as well as achieving compliance with multiple data protection / privacy laws, such as GDPR and CCPA. Indeed, the GDPR mandates Privacy by Design and requires documented Data Protection Impact Assessments (DPIAs) for high risk processing and the EU AI Act requires an assessment of fundamental rights.
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Wondershare Dr.Fone Crack is a comprehensive mobile phone management and recovery software designed to help users recover lost data, repair system issues, and manage mobile devices. It supports both Android and iOS platforms, offering a wide range of features aimed at restoring files, repairing software problems, and backing up or transferring data.A Framework for Model-Driven Digital Twin Engineering
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The full thesis is available here: https://epub.jku.at/urn/urn:nbn:at:at-ubl:1-83896Endpoint Backup: 3 Reasons MSPs Ignore It
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Many MSPs overlook endpoint backup, missing out on additional profit and leaving a gap that puts client data at risk.
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- 1. Howto Reset Root Passwords on RHEL 7 and CentOS 7 Linux Systems If you have forgotten your root password on a Red Hat Enterprise Linux 7 server you can reset your root password as long as you have access to the GRUB 2 bootloader. (The following example was performed on a OL7 server) press "e" to edit. Find line beginning linux Find the line beginning with linux. In this example the line begins linux16.
- 2. Using the arrow keys and the delete key, manually delete the following entries rhgb and quiet from the line. Next, in the end of the line add this init=/bin/sh press the keys Ctrl +X to reboot - Load the installed SELinux policy: /usr/sbin/load_policy -i - Remount the "/" root filesystem in Read/Write mode: mount -o remount,rw / - Using command passwd to change your new root password - Remount the "/" root filesystem in Read Only mode: mount -o remount,ro / - Using this command to reboot server #exec /sbin/init 6