Saturday, April 11, 2020

Recover from Starting Switch Root or corrupted Glibc

While starting the server it will not move forward after "Starting Switch Root". Step by Step let's see how to fix this issue.

How to Create a Thinly Provisioned Logical Volume on CentOS/RHEL/7/8

Thinly Provisioned Logical volume is one of the advanced feature available in Logical volume Management, We can provision storage more than what we have.

Migrating Logical Volumes in Logical Volume Management

Migrating Logical Volume by moving the extents from a PV to another PV when a faulty disk or the size of the disk need to be larger than the current one.

Striped Logical Volume in Logical volume management (LVM)

How to create Striped Logical Volumes in Logical Volume Management to get good I/O performance by balancing the data written to disks.

Shrink a Volume Group in Logical Volume Management (LVM2)

Shrink a Volume Group in logical volume management will be performed by sysadmins when the requirement in place to reduce the no of disks from a VG.

How to Extend and Reduce LVM Logical Volume in Linux

How to extend and reduce LVM logical volume management in Linux Operating Systems.

How to Setup iSCSI Target and Initiator on RHEL 7.x / RHEL 8

iSCSI Storage is a block-level storage solution shares the RAW disks over the network. iSCSI target will act as a server and iSCSI initiator will act as the client.

LINUX SECURITY

Install Wazuh Open Source Security Analytics

Install production-ready Wazuh OpenSource security analytics tool to monitor your critical production environment.

Migrate existing Iptables to Nftables in RHEL8/CentOS

Iptables can be migrated to nftables without spending time on writing it. Red Hat 8 based operating system provides translate tool to migrate the rules.

How to start using SELinux or Security-Enhanced Linux

SELinux is one of security layer in Linux which protect the directory, files, process and ports with its own labels by preventing unauthorised access.

LINUX OPERATING SYSTEMS

Step by Step Installing CentOS Linux 8 with Screenshots

CentOS Linux 8 is completely free to use and licensed under GNU GPL, It provides all features available in RHEL 8 and support available from the community.

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SYSTEM MANAGEMENT

Register a Linux client with Foreman

How to subscribe a client with our content management server foreman/Katello/Satellite.

Install Foreman Katello Patch Management on CentOS 7

Foreman with katello patch management is a Content Management System provides a lot of features such as provisioning, Inventory, Patch management and much more.

Install FOG Imaging solution for Linux/Windows and Mac

Fog or "Free Open-Source Ghost" is an open source piece of cake used for imaging solution licensed under GPL.

How to install and register Linux clients with Spacewalk server 2.8

In earlier guides, the server-side setup has been completed. Currently, its time to set up with our client-side installation and configuration. Initially, we need...

LINUX AUTOMATION

Ansible tasks for Sysadmins with 25 examples

Ansible tasks are a set of actions, the number of tasks can be combined to form a playbook required for sysadmins in their daily routine operations.

Splunk forwarder installation using Ansible

(adsbygoogle = window.adsbygoogle || ).push({}); Splunk forwarder installation can be accomplished using Ansible. In...

Create a Logical volume using Ansible

(adsbygoogle = window.adsbygoogle || ).push({}); In our last guide, we have seen how to...

RunDeck IT automation tool step by step installation guide

RunDeck is an Open source server application to automate our daily IT tasks by replacing tools like Ansible, puppet, chef.

Ansible Playbook to create Users and Groups in Linux

Step by step creating with a user adding ansible playbook, Automating user account creation in Linux using Ansible playbooks made easy with Ansible.

LINUX INTERVIEWS

Linux Interview questions and answers for Level 1 role. Those who are looking to be an entry-level Linux admin and preparing for an interview look into it.
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TROUBLESHOOTING

Recover from Starting Switch Root or corrupted Glibc

While starting the server it will not move forward after "Starting Switch Root". Step by Step let's see how to fix this issue.

Recover from chmod 777 permission on a root filesystem

How to Recover from accidentally running chmod -R 777 / on any RPM-based Linux Operating systems.

How to fix Grub Rescue in CentOS and RHEL 7

A fix for boot issue (Grub rescue) will be carried out by sysadmins by following few steps. A brief guide on how to recover GRUB and UEFI based servers.

Your account are not allowed to access to crontab because of pam configuration.

(adsbygoogle = window.adsbygoogle || ).push({}); In today guide a simple solution for above topic...

WEB SERVERS

Install and configure Apache Tomcat 8.5 on RHEL & CentOS7

Apache Tomcat is an open-source technology, which licensed under Apache License version 2. Basically to understand what the use of Tomcat it's a simple HTTP server used for Java Servlet, JavaServer Pages, Java Expression Language.

How to configure logging in Apache Web server

In this guide let us see how to log any required particular logs in Apache web server. To read about Apache related topic click on...

Understanding Apache Web Server logs

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Setup Apache Web Server on RHEL and CentOS7

(adsbygoogle = window.adsbygoogle || ).push({}); Introduction to Apache Web Server In...

RANDOM

How to Install and Configure Apt Cache Server On Ubuntu 18.04 LTS

Apt Cache Server available for Debian based Operating Systems and it helps to cache the packages installed with apt and saves a lot of bandwidth.

Register a Linux client with Foreman

How to subscribe a client with our content management server foreman/Katello/Satellite.

Setup a Linux server as IDM client to authenticate with Active Directory

Setup a Red Hat Enterprise Linux or CentOS Linux server as IDM Client to Authenticate with Active Directory using cross-forest trust.
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LATEST ARTICLES

Install Proftpd with TLS/SSL

PROFTPD use plain transfer mode. By implementing with TLS/SSL which help to secure our Proftpd with TLS/SSL by eliminating plain text transfer.

Install and configure Logwatch in Ubuntu-Server

To watch the logs and send alert periodically to admin by configuring logwatch. Install Logwatch using # sudo apt-get install logwatch Edit logwatch.conf file # /usr/share/logwatch/default.conf/logwatch.conf Change the following: #...

Setting up a Ruby gem server to use locally

(adsbygoogle = window.adsbygoogle || ).push({}); Introduction Installing gems for a Ruby...

resolvconf: Error: /etc/resolv.conf isn’t a symlink, not doing anything

If we get this error in Ubuntu while restarting network service. Here /etc/resolv.conf is a file move it to /run/resolvconf/resolv.conf.   # sudo mv /etc/resolv.conf /run/resolvconf/resolv.conf Then create...

Chroot Ubuntu or recovering from multi boot issue (windows Installation)

To recover from a windows installation first we need to boot from LiveCD of ubuntu if you installed with system 32-bit use 32bit Live...

Apache virtual host entry to forward non-SSL to SSL for Rails application

In the rails application, if we need to forward all non-SSL traffic to SSL traffic we can use below virtual host entry. By default, rewrite...

Enable setup command in minimal installed Redhat or Centos 6 Linux

In minimum install setup, the command will not be enabled because it installed with limited packages. When we try to run "setup" command if...

Mounting Samba shares persistently during reboot

To mount a samba share during each reboot we need to interact manually. This can be automated by putting the samba share entry in...

Install and configure VNC server in CentOS 6, Red Hat 6 & Oracle Linux

Tiger VNC server will allow users to access remote servers Desktop environment. A number of concurrent users can access the server remotely using VNC server

Copy user files from Ubuntu or Debian servers to Amazon S3 bucket

If we have several Virtual private servers (VPS) and we need to back up the user data's and database's to Amazon S3...

MOST POPULAR

Recover from Starting Switch Root or corrupted Glibc

While starting the server it will not move forward after "Starting Switch Root". Step by Step let's see how to fix this issue.

Recover from chmod 777 permission on a root filesystem

How to Recover from accidentally running chmod -R 777 / on any RPM-based Linux Operating systems.

Linux Sudo to run Privileged Commands

Allow normal users to run any privileged commands by escalating to Sudo, by configuring Linux Sudo on any Linux os normal users are allowed to get root access.

Register a Linux client with Foreman

How to subscribe a client with our content management server foreman/Katello/Satellite.
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