Knowledgebase

Laravel is a powerful MVC-PHP framework, designed for developers who need a simple and elegant...

yum, command is an interactive, open source, rpm based, the package manager for a CentOS/RHEL and...

The post outlines steps to create a Property-Based Filter to Discard( suppress ) a particular...

The command-line tool firewall-cmd is part of the firewalld application, which is installed by...

Use the journalctl command to view the journal logs. By default, the listed entries include a...

The main configuration file for Apache is /etc/httpd/conf/httpd.conf. Apache runs as installed,...

Apache containers are special configuration directives that group other directives. The...

We have added new audit rules to the configuration file /etc/audit/rules.d/audit.rules as shown...

auditd is the userspace component to the Linux Auditing System. It’s responsible for writing...

Automounting is an alternative to creating NFS mount entries in /etc/fstab or using the mount...

Dynamic Host Configuration Protocol (DHCP) allows client machines to automatically obtain network...

Maintaining Software Using RPM (Red Hat Package Manager)   RPM is a powerful software manager...

A Network File system (NFS) allows a server to share directory hierarchies (file systems) with...

Samba is an open-source implementation of the Server Message Block (SMB) protocol. It allows...

Swap space is used in Linux when there is insufficient physical memory (RAM) on your system to...

Apache HTTP server   The Apache HTTP Server, an open-source web server developed by the Apache...

The Linux kernel is loaded into memory by the boot loader. Kernel modules are dynamically loaded...

File Transfer Protocol (FTP) is a commonly used method of downloading and uploading files between...

Procedure: Start your RHEL / CentOS 7/8 Linux machine. Upon the boot-loader appears, press any...

While installing some application, are you facing the error “Can’t locate Getopt/Long.pm in...

The Linux system log daemon is responsible for logging system messages. Starting RHEL 6, The...

The GRUB2 configuration file /boot/grub2/grub.cfg – Starting RHEL 7 GRUB 2 is the bootloader....

Kdump is the Linux kernel crash dumping mechanism. In the event of a system crash, Kdump provides...

The FTP service/server is provided by the vsftpd daemon. Very Secure FTP Daemon (vsftpd) is the...

The post outlines the steps to modify the kernel command line (and, thus, kernel boot parameters)...

The SMB service is unable to start, SAMBA shares can’t be accessed. Using systemctl fails to...

Kdump is the Linux kernel crash dumping mechanism. In the event of a system crash, Kdump provides...

sysctl parameter didn’t take effect after a reboot on RHEL 7 server. Parameter...

While starting or restarting the vsftpd service you might get below error on an RHEL 7 system. #...

For the purpose of this post, let’s assume that you do not have any swap configured on your...

YUM (Yellowdog Updater, Modified) provide more services and functionality than is available with...

Due to application certification and other restrictions in a production environment, it may be...

By default, the LVM configuration does not allow you to log the commands that are used in a shell...

Nginx is a free, open-source, and one of the most common webserver throughout the world. The high...

When I'm trying to update my centos, it's not a vm, i have this error message:     installing...

Check Date of your Machine which includes Time. date   Check Current TimeZone. date +’%Z %z’...

The default configuration of the /etc/named.conf file provides a caching-only nameserver. The...

You may sometime need to download packages without installing them. This could become difficult...

Btrfs is an open-source, general-purpose file system for Linux. The name derives from the use of...

Requirements Root Access for the server   Procedure   Open Port in CentOS 6 Log in to...

Below example shows how to create a systemd script to mount a disk under a specific path on...

Hard disks can fail unexpectedly and it is always best to keep recent backups of all important...

Django is a Python-based free and open-source web framework that can be used for developing...

Icinga 2: It is a free and open source monitoring tool which helps you to monitor network...

Webmin is a web-based interface for system administration for Linux-based servers. Step 1: Login...

Today let us learn how to install and configure CSF on CentOS 7. ConfigServer Security &...

A TCP/IP network connection may be either blocked, dropped, open, or filtered. These actions are...

In CentOS/RHEL 7, tmpfiles cleans up /tmp or /var/tmp by removing unused files. This function was...

Use the xfsdump and xfsrestore utilities to back up and restore files in an XFS file system. You...

First restart your CentOS 7 machine, once boot process starts, wait for the GRUB boot menu to...

By default, /var/log/messages* are created with read-write permissions for ‘root’ user only....

The parameter timeout:n can be set in the configuration file /etc/resolv.conf to adjust the time...

Traditional Linux access permissions for files and directories consist of setting a combination...

Udev is the mechanism used to create and name /dev device nodes corresponding to the devices that...

Promiscuous mode or promisc mode is a feature that makes the ethernet card pass all traffic it...

In earlier versions of RHEL, network bonding was the default method for creating aggregated...

Configure Remote Rsyslog To Accept TLS and Non-TLS in CentOS/RHEL, we need to have following...

Setting up the network and bringing servers into the network is the primary administration task...

Following steps to configure udev rule which would automatically switch the USB disks to...

Follow below steps to configure rsyslog to filter messages with specific IP address.   1....

btrfs or Butter FS is a filesystem and has some interesting features:   One can have FS...

Here is a short howto on creating a new /boot partition in LVM and migrate the existing boot...

Btrfs is an open-source, general-purpose file system for Linux. The name derives from the use of...

Non-Uniform Memory Access or Non-Uniform Memory Architecture (NUMA) is a physical memory design...

To disallow the loading of malicious or unwanted modules, we can blacklist them. In order to...

XFS supports disk quotas by user, by group, and by project. Project disk quotas allow you to...

Firewalld is a progressive daemon to handle firewall with support for networks zones. In the...

Here is a short note on how to configure Apache to use a certificate file for SSL or How to...

The main configuration file for VSFTPD is ‘/etc/vsftpd/vsftpd.conf‘. When verbose logging is...

To enable X11 Forwarding on a server client edit the file “/etc/ssh/ssh_config” and on ssh server...

At boot time (or whenever a network driver is loaded) interfaces are always assigned ethX style...

There are three ways to restrict number of CPU’s in CentOS/RHEL.   Using maxcpus parameter...

A loopback device is used to access filesystems that are not associated with a block device (Hard...

Caddy, sometimes clarified as the Caddy web server, is an open source, HTTP/2-enabled web server...

FreeIPA is a free and open source Identity, Policy, and Audit (IPA) suite sponsored by RedHat....

GitLab CE (Community Edition) is an open-source application used to host Git repositories with...

Memcached is a distributed, high-performance, in-memory caching system.  It is often used to...

First of all, Let us see: What is Node.js? Node.js is an open-source, cross-platform JavaScript...

A popular open-source server-side scripting language that is integral in developing dynamic...

Prerequisites: A server running CentOS 8. A root password is configured on your server....

Vanilla is free, open source discussion forum written in PHP. Vanilla Forum software is...

The user wants to see the list of commands used in the syslog messages. This way the user can...

An incorrect configuration in /etc/grub2.conf or  /boot/grub2/grub.cfg can cause CentOS/RHEL 7 to...

Starting RHEL 7, GRUB2 is the default boot loader. The configurations and settings of GRUB2 are...

The requirement here is that the user should not use the last 10 used passwords again when...

The GRUB2 files went missing under the /boot directory. Missing ‘/boot’, /boot/grub2 folder and...

There is only one Network card on machine but ifconfig shows 2 interface by name virbr0 and...

It is a common task to resize/expand btrfs file system since btrfs is widely used in CentOS/RHEL...

DNS errors occur essentially because you cannot connect to an IP address, which can sometimes...

The post outlines steps to create UDEV rules that run a specific script when a USB device is...

Kibana is an open source data visualization plugin for Elasticsearch. It provides visualization...

Nginx Server Blocks allows you to run more than one website on a single machine. This is useful...

FirewallD is a complete firewall solution that manages the system’s iptables rules and provides a...

1. Check the attributes of the FC remote port(s) using the below command: # udevadm info...

The psacct service is responsible for starting and stopping process accounting at system boot...

The Linux ssh server never disconnects ssh session from server side by default, check...

You can use any of the two solutions provided below to solve the above issue.    1. Using PAM...

It is possible to limit bandwidth used by yum while downloading package updates using throttle...

Btrfs is a filesystem which is very new and is still under development and benchmarking phase. As...

The iperf is a tool used for testing the network performance between two systems. The iperf...

“repoquery” is a program for querying information from YUM repositories similarly to rpm queries....

ALUA stands for Asymmetrical Logical Unit Access. Midrange arrays usually have an internal...

The systemd facility replaces the older System-V initialization scripts from earlier releases....

To add a new user to access a samba share you need to first create a server user account using...

After installation and start of the VSFTPD service, two files are created in the /etc/vsftpd/...

The login to specific users can be allowed or denied using the file /etc/pam.d/remote. Other...

The Soluition – During normal operation, a network interface filters out received unicast...

“dd” command can be really handy when it comes to taking an Operating System backup to clone the...

When there is an issue with booting up RHEL / CentOS 7 system you can boot it into rescue mode...

You have a system configured with hugepages and you want to find per-process hugepages...

The default location of /var/log/messages file can be changed to any location of your choice....

The user wants to change the default permissions of the log file /var/log/messages to make it...

The 2 environment variables which majorly affects the Bash History setting of saving the last run...

An important task related to troubleshooting can arise from an understanding of activities...

Removing the rhgb and the quiet kernel command-line parameters, either by editing the...

Installation The script must be run as root user. You can view the source code here. Use the...

Previous versions of CentOS/RedHat Linux use init scripts located in the /etc/rc.d/init directory...

Open SSH to your server, if SSH will not connect due to disk space full in tmp, reboot your...

For some operations (for example, a yum install operation), Yum downloads the packages to install...

To clear the disk space on CentOS 6 or CentOS 7 servers, you can use single line command:...

Are you facing a performance issue and you suspect it might be related to cache usage? High cache...

The procedure to configure DM-Multipath from an iSCSI initiator to an iSCSI target is presented,...

The Network Time Protocol (NTP) enables the accurate dissemination of time and date information...

Install acme.sh client and use it on a CentOS/RHEL 7 to get an SSL certificate from Let’s...

A VLAN is a type of local area network that does not have its own dedicated physical...

Caching-only nameservers, or recursive nameservers, offer resolution services but they are not...

The chronyd service uses the /etc/chrony.conf configuration file to set synchronization...

In environments such as government companies, users may want to secure their data which can...

HugePages is a feature integrated into the Linux kernel with release 2.6. This feature basically...

Internet Small Computer System Interface (iSCSI) is an IP-based standard for connecting storage...

Internet Small Computer System Interface (iSCSI) is an IP-based standard for connecting storage...

Promiscuous mode or promisc mode is a feature that makes the ethernet card pass all traffic it...

Multicast can be used to send IP packets to a group of interested receivers. Compared with...

To allow rsync and disable ssh by configuring rsync in daemon mode. In order to achieve this...

Realmd provides a simple way to discover and join identity domains. It configures Linux system...

The XFS filesystem is a high performance journalling filesystem. XFS is the default file system...

In RHEL 5 and 6, we were using automatic startup feature of RHEL through /etc/rc.d/init.d to run...

Device-Mapper Multipath (DM-Multipath) is a Linux native multipath tool, which allows you to...

In most of the situations you would simply create a loopback device using “losetup” and mount it...

Linux supports a special block device called the loop device, which maps a normal file onto a...

The post list out the steps to delete a disk partition using fdisk command. Please note the...

Internet Small Computer System Interface (iSCSI) is an IP-based standard for connecting storage...

We have already seen how to disable ipv6 globally on CentOS / RHEL 7. There could be an ask to...

1. Login to the server as root.   2. Take backup of the file /lib/systemd/system/sssd.service....

Explicit Huge Pages V/s Transparent Huge Pages   There can be two types of HugePages in the...

Upon system bootup there should be a single tty console running Xorg on it. New tty consoles are...

The avahi-daemon Linux service runs on client machines to perform network-based Zeroconf service...

By default, RHEL 7 uses the FirewallD service to provide network security. Firewalld may not be...

LVM can optionally use a central metadata cache, implemented through a daemon (lvmetad) and a...

If you check the ‘ifconfig -a’ after a fresh install of RHEL/CentOS 6,7 system, you would find...

Unaccessed files or directories in /tmp gets automatically removed by the default function of...

To disable ping or ICMP responses from a CentOS/RHEL system, we can use kernel parameter...

As per package description, RealtimeKit is a D-Bus system service that changes the scheduling...

Apache is an open-source HTTP server for modern operating systems, including UNIX and Windows....

In CentOS/RHEL 7, /etc/init/control-alt-delete.override no more works to override the key...

IPv6 is enabled by default on RHEL / CenOS 7 systems. So, if IPv6 was disabled on the system...

Secure File Transfer Protocol (SFTP) is a great tool for performing secure file transfers. This...

Bind query logging can be very handy if you are troubleshooting a problem. However, it generates...

GDM can be configured to allow remote access via XDMCP (X Display Manager Control Protocol). We...

PackageKit is the graphical software updater in RedHat based linux distributions. The posts...

In CentOS/RHEL 7, the /etc/pam.conf is depreciated and /etc/pam.d/remote will be used for...

In order to allow users to see what is going on, auditd can record all the audit-related events...

Non-Uniform Memory Access or Non-Uniform Memory Architecture (NUMA) is a physical memory design...

Installing psacct (process accounting)   The psacct service is responsible for starting and...

Method 1: If you only have remote access to the server If the server’s management module (such...

With the introduction of systemd in RHEL 7 the boot process has become a lot faster because many...

Use the xfs_growfs command to increase the size of an XFS file system. The XFS file system must...

To Increase CentOS Linux Server Security, all we need to do the following with little patience....

Apache CouchDB is open source database software that focuses on ease of use and having a scalable...

Here, we will show you how to install a CentOS Web Panel. To complete this,  you might need a VPS...

Drupal is a free and open source content management framework written in PHP and distributed...

Install EPEL repository Although we are going to install GoAccess from source, we need some...

Jenkins is an open source automation server written in Java. Jenkins helps to automate the...

assuming that you have root permission, otherwise, you may start commands with “sudo”. Install...

Laravel is a powerful MVC-PHP framework, designed for developers who need a simple and elegant...

MEAN is a free and open-source JavaScript software stack for building dynamic websites and web...

Mod_evasive is a module for Apache that provides evasive action in the event of an HTTP...

Moodle is a free and open-source learning management system written in PHP. Moodle is used for...

PageSpeed is one of the Nginx’s modules developed by Google to speed up the web site or web...

NodeBB Forum Software is powered by Node.js and built on either a Redis or MongoDB database. It...

Open VM Tools (OVT) consists of a suite of virtualization utilities that improves the...

  Install PHP 7.2 on CentOS 7 Turn on EPEL repo on a CentOS and RHEL 7.x sever by typing the...

Note: Redis 4 is not stable yet so if you know what are you doing put your gloves on....

Requirements- Linux Machine with CentOS 6/7 with Root Permissions Internet Connection...

Ruby on Rails, or Rails, is a server-side web application framework written in Ruby. It provides...

Introduction SQLite is a C library that implements an SQL database engine. A complete database...

Vue.JS is a JavaScript progressive front-end framework for building User Interfaces (UI). It was...

Caddy, sometimes clarified as the Caddy web server, is an open source, HTTP/2-enabled web server...

Virtual Network Computing (VNC) works by capturing the display’s frame buffer and making it...

Elasticsearch is a search engine based on Lucene. It provides a distributed, multitenant-capable...

ABRT (Automatic Bug Reporting Tool), is a set of tools that help users detect and analyze...

MariaDB is the default implementation of MySQL in Red Hat Enterprise Linux 7. MariaDB is a...

To provide printer and file sharing, Microsoft Windows uses a facility known as SMB (Server...

The sosreport tool collects information about a system, such as hardware configuration, installed...

It’s not recommended to use telnet as it is not secure. The passwords are transferred using a...

SELinux (Security Enhanced Linux) provides mandatory access control to the Linux operating...

phpMyAdmin is a free and open source administration tool for MySQL and MariaDB. As a portable web...

Docker is free and open-source software. It automates the deployment of any application as a...

Django is a free and open-source web framework, written in Python. It's primary goal is to ease...

A situation where the system has no kernel to boot from maybe because all the kernel are removed...

Gender PHP extension is “gender.c” part program written by Joerg Michael. PHP gender extension...

We will need the following packages installed on the CentOS / RHEL server: realmd: This...

Any change made with the ethtool program does not persist across reboots or network module...

Sometimes, to troubleshoot some multipath related issues, you would require to map the...

UUID (Universally Unique IDentifier) should be unique, and its purpose is to identify storage...

In our environment, we have duplicate initiator id in /etc/iscsi/initiatorname.iscsi due to...

System auditing is a very important task that should be a part of every server. It allows us to...

One of the best things about auditd is that it is tightly integrated with the kernel, so it gives...

Auditing can provide accountability by tracing the actions of a user or process. It can state...

Please note that fix currently available for the following distros for sure (kernel version that...

Fix the Spectre on a CentOS/RHEL/Fedora/Oracle/Scientific Linux Type the following yum command:...

The purpose of this post is to explain how to configure kernel parameters on Red Hat...

For any reason, if the yum transaction was interrupted before it could complete, you would get an...

Why rpm database gets corrupted There can be multiple reasons which can lead to rpm database...

The ‘root’ entry was removed from /etc/shadow and /etc/passwd. How to recover the deleted root...

CentOS / RHEL 7 now includes GRUB2 which uses a new way of installing to the MBR of your boot...

To remove the default rescue image that gets installed when you install a CentOS/RHEL 7 system....

LVM takes a backup of the on-disk metadata before and after running any LVM operation on a...

So the requirement here is, we do not want to run MariaDB as the mysql user and group which is...

After you have assigned a new disk/LUN from storage to the designated server, you have to follow...

 The following are the steps for direct audit logs of a remote rsyslog server on a CentOS/RHEL...

There could be a requirement from client to have custom device names such as /dev/asmdisk01 for...

RHEL 7 offers another utility to configure and display date and time information, timedatectl....

This post outlines how a Linux System administrator can limit the allowed number of processes for...

Udev is the mechanism used to create and name /dev device nodes corresponding to the devices that...

Do you know? You can turn off the banner in Linux or Unix using a particular file. We will walk...

Here, I’m illustrating with kernels A, B and C. A is the new kernel, B and C are older kernels....

Dynamic Host Configuration Protocol (DHCP) allows client machines to automatically obtain network...

The nc utility, which is also called netcat, comes in very handy when you want to test TCP/IP...

The nfsiostat command works like the iostat command except only for the NFS mount points. The...

Internet Small Computer System Interface (iSCSI) is an IP-based standard for connecting storage...

CloudLinux OS is a Linux distribution marketed to shared hosting providers. It uses the OpenVZ...

SysRq utility In case your kernel freezes or/and hangs, you can use ‘magic’ SysRq tool. The...

cThe auditd service can be a perfect tool to investigate such file deletion issues. The post...

A SYSCALL happens whenever a user executes a command that requests that the Linux kernel provide...

“qperf“, is one of the many tools used to measure bandwidth and latency between two nodes. qperf...

The rndc utility is a command-line tool to administer the named service, both locally and from a...

Btrfs is an open-source, general-purpose file system for Linux. The name derives from the use of...

You can initiate a check of the entire file system by triggering a file system scrub job. The...

Use the xfs_admin command to change the parameters of an XFS file system. You can also use the...

When i installed a new version of the Java Runtime Environment but the “java -version” command...

The Problem While accessing a directory mounted on XFS filesystem, it is throwing Input/Output...

Hadoop is an open-source framework that is widely used to deal with Bigdata. Most of the...

curl is a command-line tool to transfer data to or from a server, using any of the supported...

Here is a short note on List of Commands to Install Security Vulnerabilities with yum. To get...

Linux OS Service ‘vncserver’ executes a VNC server daemon, which is used to start a VNC desktop...

This post lists some of the more commonly used command-line utilities for managing and operating...

The best tool for maintaining file systems is fsck, which checks and repairs Linux file systems....

Here’s a Bash script to kill sleeping MySQL connections automatically and almost immediately to...

  Introduction   There are times when you have a system that has a single boot partition that...

There are tons of monitoring tools that are used for keeping an eye on systems performance and...

When trying to start MySQL using systemctl fails to start, for example: # systemctl status...

Lightweight Directory Access Protocol (LDAP) is used to access centrally stored information over...

Need of a Centralized Rsyslog Server Every *NIX system has some sort of logging facility that...

The XFS File system is a high-performance journaling file system. XFS supports a maximum file...

1. Remove the /var/run/sssd/sssd.pid file if exists else remove /var/run/sssd.pid file. # rm...

Below is a sample /etc/multipath.conf file taken from CentOS 7.4, from the directory...

SSH login to a linux server may get delayed or slow if you have a wrong rsyslog server entry or...

There are instances when you are unable to connect to ssh due to disk space being full in tmp,...

Symptoms will include (but are not limited to): After turning off swap or after a reboot, one...

TCP wrappers are capable of more than allowing and denying access to services. With the optional...

Internet Small Computer System Interface (iSCSI) is an IP-based standard for connecting storage...

This may be a case of Firewall on the local server dropping inbound connection attempts from...

You can disable all color in your shell. By default, colors are turned on by many commands. The...

User is unable to Extend the LVM file system which has a snapshot, Error "Snapshot origin volumes...

UNIX/Linux operating systems have the ability to limit the number of various system resources...

The xinetd daemon is a TCP wrapped super service which controls access to a subset of popular...

xinetd daemon The xinetd daemon is a TCP wrapped super service which controls access to a subset...

NUMA is a technology that allows the system memory to be divided into zones, also named nodes....

The multipathd daemon checks for failed paths and reconfigures the multipath map. The daemon runs...

Information about domains in the DNS database is stored in zone files. A zone file consists of...

SCSI Reservation is a mechanism which allows SCSI initiators to reserve a LUN for exclusive...

RPM is a powerful software manager which can be used to build, install, query, verify, update,...

A given SELinux policy can be customized by enabling or disabling a set of policy Booleans....

SELinux File Labeling All files, directories, devices, and processes have a security context (or...

The SELinux policy describes the access permissions for all users, programs, processes, files,...

The following list summarizes the command-line utilities included with the Samba packages. Use...

TCP wrappers provide basic traffic filtering of incoming network traffic. Access to “wrapped”...

The proc file system contains a hierarchy of special files that represent the current state of...

In addition to /proc, the kernel also exports information to another virtual file system called...

As the name implies, a chroot operation changes the apparent root directory for a running process...

By default, multipath devices are identified by a World Wide Identifier (WWID), which is globally...

Internet Small Computer System Interface (iSCSI) is an IP-based standard for connecting storage...

The configuration file for Kdump is /etc/kdump.conf. The default target location for the vmcore...

Use the mpathconf utility to configure DM-Multipath. The mpathconf utility creates or modifies...

The multipath utility is the device mapper target auto-configurator, which is used to detect and...

If you are a Linux system admin you must have dealt with at least one of the shell profile files...

The main configuration file for DM-Multipath is /etc/multipath.conf. This file is not created by...

The nfsiostat command works as iostat command for the NFS mount points on the server. It uses the...

“yum history” is an often overlooked but really useful feature provided in the CentOS/RHEL/Fedora...

Let us check how to upgrade/install MariaDB to latest Mariadb10.4 on Centos 7 this tutorial will...

Installing Redhat upgrade tool:   redhat-upgrade-tool is not available on standard...

SELinux Modes SELinux runs in one of three modes (or states).   Enforcing This is the default...

There are SELinux users in addition to the regular Linux users. SELinux users are part of an...

Samba Server type is configured in the [global] section of the /etc/samba/smb.conf file. Below...

Network interface bonding is called by many names: Port Trunking, Channel Bonding, Link...

The queue depth indicates the number of I/O requests that are “in flight”, that have been...

Here is a short note, if you are looking for packages (RPM) for Oracle ASMLib (oracleasm) for...

A Martian packet as one which arrives on an interface where the interface does not use that...

Applications that handle a huge number of TCP connections, either as a server or as a client,...

In CentOS/RHEL 7, tmpfiles.d cleans up /tmp or /var/tmp by removing unused files. This function...

While issuing any yum command, you would get an error shown below: # yum list Loaded plugins:...

While formatting a USB disk which was mounted in write-protected mode we are getting the below...

ifconfig command to configure network interfaces, enable or disable the interface, display IP...

pvcreate command fails while using multipath device with below error even when the device is...

So, here is the situation – pvcreate and vgcreate command throws errors shown below. # pvcreate...

 Run semanage command to make a change in SELinux policy to allow us access to MongoDB on port...

The systemctl command is used to interact with systemd and can be used to list systemd unit...

ip command provided by the iproute package is used to adjust addresses, link state, routing...

Error While executing yum commands user is getting below error: # yum update Bad id for repo:...

Btrfs is an open-source, general-purpose file system for Linux. The name derives from the use of...

This issue could occur when two or more Ethernet interfaces are connected to the same subnet or...

The issue is caused by the use_mlockall parameter in the LVM configuration file...

Mounting the nfs share from CentOS/RHEL NFS server on a NFS client gives error as shown below: #...

On CentOS/RHEL system, an LVM volume group size has been extended and an attempt to do online...

Sentora is a completely free web hosting control panel for Linux, UNIX and BSD based servers...