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Linux WARNING: Duplicate VG name server1 LVM2 Error and Solution
The "WARNING: Duplicate VG name server1 LVM2" error occurs when you have multiple Logical Volume Manager (LVM) volume groups with the same name on your Linux system. To resolve this error, you will need to remove the duplicate volume group. Here's how:rn rn Run the vgs command to list all of the
Linux / Unix: Find All Hidden Dot Directories and Delete
To find and delete all hidden directories (directories starting with a dot) in a Linux or Unix system, you can use the following command:rn rn rn find /path/to/search -name ".*" - type d - exec rm -rf {} \;rn rn rnReplace /path/to/search with the path to the directory where you want to search for hi
Debian Linux: Upgrade v6.0.x Squeeze to v7.0.0 Wheezy
To upgrade from Debian 6.0.x (Squeeze) to 7.0.0 (Wheezy), you can follow these steps:rn rn Backup your data: Before upgrading, it's always a good idea to backup your data to ensure that you don't lose any important files during the upgrade process. rn Update your current installation: Run the follow
Ubuntu Linux: Install Wake On Lan Client For Server
To install a Wake-on-LAN client on an Ubuntu Linux server, you can use the etherwake package. Here’s how to install it: n n Open a terminal window. n Install the etherwake package by running the following command: n n n n sudo apt- get install etherwake n n n n After the installation is comple
Ubuntu Linux: Install Google Chrome Browser Command
To install Google Chrome browser on an Ubuntu Linux system, you can use the following steps:rn rn Download the Google Chrome Debian package by visiting the following link: rn rn https://www.google.com/chrome/ rn rn Open a terminal window and navigate to the directory where you downloaded the package
scp: Do not Overwrite Existing File On Linux or Unix System
To use scp on a Linux or Unix system and avoid overwriting an existing file, you can use the -n or --no-clobber option. This option prevents scp from overwriting existing files in the target directory. n Here’s an example of using scp with the -n option: n n n scp -n source_file user @target_h
Linux: Dell Laptop Fan Control And Get CPU Temperature
To control the fan speed and get the CPU temperature on a Dell laptop running Linux, you can use the lm-sensors and fancontrol packages. Here are the steps to install and configure them: n n Install the lm-sensors and fancontrol packages by running the following command in the terminal: n n n n sudo
Ubuntu Linux: Install Latest Oracle Java 7
To install the latest version of Oracle Java 7 on Ubuntu Linux, you can use the following steps: n n Add the Oracle Java PPA to your system’s software repository list by running the following command in the terminal: n n n n sudo add-apt-repository ppa:webupd8team/java n n n n Update the packa
How to Fix the 'Preview Could Not Be Loaded' Error - Elementor
The "Preview Could Not Be Loaded" error in Elementor can occur for several reasons, including server connection issues, incorrect WordPress settings, and conflicts with plugins or themes. Here are some steps to fix the error:rn rn Check your server connection: Ensure that your website is not facing
Linux / Unix: View Overlapping Man Page With Same Names
In Unix-like systems, the manual pages (man pages) are stored in separate sections. If two man pages have the same name but are stored in different sections, you can use the man command with the -a option to view all of the man pages with the same name:rn rn rn man - a rn rn rnFor example, if you wa
Ubuntu / Debian Linux: Install gcutil Tool To Manage Google Compute Engine
The gcutil tool is used to manage Google Compute Engine instances. To install gcutil on Ubuntu or Debian, you can use the following steps:rn rn Install the Google Cloud SDK: rn rn rn rn export CLOUD_SDK_REPO= "cloud-sdk- $(lsb_release -c -s) " rn echo "deb http://packages.cloud.google.com/apt $CLOUD
RHEL / Fedora /CentOS Linux: Set RPM Build Environment
To set up the RPM build environment on RHEL, Fedora, or CentOS, you need to install the rpm-build package and a few other required packages. Here are the steps to set up the RPM build environment:rn rn Install the required packages: rn rn rn rn sudo yum install rpm-build redhat-rpm- config rpmdevtoo
Nginx: SPDY SSL Installation and Configuration On a Debian / Ubuntu Linux
Here are the steps to install and configure SPDY SSL on Nginx on a Debian or Ubuntu Linux system:rn rn Install Nginx: rn rn rn rn sudo apt - get update rnsudo apt - get install nginxrn rn rn rn Obtain an SSL certificate: You can either purchase an SSL certificate from a trusted certificate authority
Ubuntu Linux Install vim Text Editor using apt-get
You can install the vim text editor on Ubuntu Linux using the apt-get package manager. Here are the steps to install vim :rn rn Update the package lists by running the following command in the terminal: rn rn rn rn sudo apt - get update rn rn rn rn Install vim by running the following command: rn rn
Ubuntu Linux: Turn On Exec-Shield Buffer Overflow Protection
Exec-Shield is a security feature in the Linux kernel that provides protection against buffer overflow attacks. To turn on Exec-Shield on Ubuntu, you need to modify the boot command line and add the following parameter:rn rn rn execstack=offrn rn rnHere are the steps to do this:rn rn Boot into the G
Unix and Linux: Redirect Error Output To null Command
In Unix and Linux, you can redirect the error output (stderr) of a command to /dev/null using the following syntax:rn rn rn command 2 > /dev/ null rn rn rnThis sends the error output of the command to the null device, effectively discarding it. Note that the standard output (stdout) will still be
sed Tip: Delete All Blank White Spaces
You can use the following sed command to delete all blank spaces in a file:rn rn rn sed 's / * //g' filename > outputfile rn rn rnThis command replaces all occurrences of zero or more spaces with nothing. The > outputfile redirects the output to a new file called outputfile . If you want to mo
Debian 7 Wheezy: Install Flash Player
Adobe Flash Player is not included in Debian 7 Wheezy by default, but you can install it manually. Here's how: Download the latest version of the Flash Player plugin for Linux from the Adobe website: https://get.adobe.com/flashplayer/ Extract the downloaded archive and navigate to the extracted fold
Mac OS X: Install GCC Compiler with Xcode
GCC (GNU Compiler Collection) is not included in Mac OS X by default, but you can install it using Xcode. Here's how: Install Xcode: You can download Xcode from the Mac App Store or from the Apple Developer website. Open Xcode and go to "Preferences." Go to the "Downloads" tab and select "Command Li
CentOS / RHEL: Check If A Service Is Running Or Not
On CentOS/RHEL, you can use the systemctl command to check if a service is running or not. Example: systemctl is -active <service-name>.servicern Replace <service-name> with the actual name of the service you want to check. The .service extension is necessary to specify that it is a syst
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