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How to install vim on CentOS/RHEL 8 using dnf/yum
To install Vim on a CentOS or RHEL 8 system using the dnf package manager, you can use the following command: n n n sudo dnf install vim n n n Alternatively, if you are using the yum package manager, you can use the following command: n n n sudo yum install vim n n n Both dnf and yum use the same pa
Nginx restore real IP address when behind a reverse proxy
When Nginx is being used as a reverse proxy, the client's IP address is usually passed to the backend server in the X-Real-IP header. To restore the real IP address in Nginx, you can add the following configuration to your Nginx server block:rn rn rn set_real_ip_from proxy_ip;rnreal_ip_header X - Re
How To Secure Apache with mod_md Let’s Encrypt on Ubuntu 20.04 LTS
To secure Apache with mod_md and Let's Encrypt on Ubuntu 20.04 LTS, you can use the following steps:rn rn Install the necessary dependencies by running the command: rn rn rn rn sudo apt install -y apache2 certbot python3-certbot-apachern rn rn rn Enable the mod_md module by running the command: rn r
How to install man pages on Ubuntu Linux
To install man pages on Ubuntu Linux, you can use the package manager apt. Open a terminal and enter the following command:rn rn rn sudo apt- get install manpages-devrn rn rnThis will install the man pages for the development libraries and headers on your system. If you want to install the man pages
How to install Nginx on Ubuntu 20.04 LTS
To install Nginx on Ubuntu 20.04 LTS, you can use the following steps:rn rn Update the package list by running the command: rn rn rn rn sudo apt update rn rn rn rn Install the Nginx package by running the command: rn rn rn rn sudo apt install nginxrn rn rn rn After the installation is completed, the
How to install htop on Debian Linux 11/10/9 using APT
To backup a LXD container, you can use the "lxc publish" command. The basic syntax for this command is "lxc publish --alias ". This will create a snapshot of the container and save it as a new image with the specified alias (or backup name). For example, to create a backup of a container named "m
How to configure AWS SES with Postfix MTA
To configure Amazon Web Services Simple Email Service (AWS SES) with Postfix Mail Transfer Agent (MTA) on a Linux server, you can follow these steps:rn rn Install and configure Postfix on your Linux server. You can refer to the official Postfix documentation for instructions on how to do this. rn Cr
How to backup and restore LXD containers
To backup a LXD container, you can use the "lxc publish" command. The basic syntax for this command is "lxc publish --alias ". This will create a snapshot of the container and save it as a new image with the specified alias (or backup name). For example, to create a backup of a container named "m
How to extract tar.xz files in Linux and unzip all files
The "tar" command is used to create and extract archive files in Linux. To extract a tar.xz file, you would use the command "tar -xf ". The "-x" option tells tar to extract the archive, and the "-f" option tells it to use the following file as the archive to be extracted. So, in this case, it wil
How to find ulimit for user on Linux
To find find ulimit for user on Linux You can use the "ulimit" command to view the current ulimit settings for a user on Linux. To view the current ulimit settings for the current user, simply run "ulimit -a" in the terminal. To view the ulimit settings for a specific user, run "su -c 'ulimit -a'" (
5 Best Online Image Optimizer Tools Compared
When it comes to optimizing images for the web, there are a plethora of tools available to help you reduce file size without sacrificing quality. In this article, we’ll take a look at some of the top online image optimization tools and compare their features, pricing, and ease of use. n n Goma
HowTo: Python Convert a String Into Integer
In Python, you can convert a string to an integer using the int() function. Here is an example:rn rn rn string_num = " 123 "rnint_num = int (string_num)rn print (int_num)rn rn rnOutput:rn rn rn 123rn rn rnYou can also use the float() function to convert a string to a floating-point number.rn rn rn s
How To Run a Script In Linux
There are several ways to run a script in Linux, depending on the type of script and the desired execution environment. Here are a few examples:rn rn To run a shell script, you can make the script executable by running chmod +x script_name.sh and then execute the script by running ./script_name.sh .
Python For Loop Examples
rn rn rn rn rn A for loop in Python is used to iterate over a sequence (such as a list, tuple, or string) and execute a block of code for each item in the sequence. Here are some examples of using a for loop in Python:rn rn Iterating over a list: rn rn rn rn fruits = rnfor fruit in fruits:rn pri
How To Install Python On Linux 2.x/3.x latest version
manager of your Linux distribution. Here are the steps to install the latest version of Python on Linux 2.x/3.x:rn rn Update your package manager by running the command sudo apt-get update (on Ubuntu or Debian) or sudo yum update (on Red Hat or Fedora). rn Install the latest version of Python by run
Lighttpd: network.c:483: error: ‘EC_KEY’ undeclared (first use in this function) Error and Solution
The "network.c:483: error: 'EC_KEY' undeclared" error is caused by a missing library or header file that is necessary for the Lighttpd web server to function properly. To resolve this issue, you will need to install the OpenSSL library and its development headers on your system. On Ubuntu or Debi
Linux: Reset High Speed USB Device Using ehci_hcd Error and Solution
If you are experiencing errors with a high-speed USB device on a Linux system and are seeing messages related to the ehci_hcd driver, you may need to reset the device. One way to reset a USB device is to use the lsusb command to identify the device and then use the ehci_hcd driver to reset it. He
How to download a file with curl on Linux/Unix command line
To download a file using curl on the Linux/Unix command line, you can use the following syntax:rn rn rn curl -O < URL > rn rn rnFor example, to download a file named "example.txt" from " http://example.com/example.txt ", you would use the command:rn rn rn curl -O http : //example.com/example.t
nmap Command: Scan A Single IP Address or Host
rn rn rn rn rn To use the nmap command to scan a single IP address or host, you can use the following syntax:rn rn rn nmap <IP address or hostname>rn rn rnFor example, to scan the IP address 192.168.1.1, you would use the command:rn rn nmap 192.168.1.1rn rn rnOr to scan a hostname, for exa
Linux Command To Shutdown HP/IBM/Sun/Dell Server System
There are several ways to shut down a Linux server, depending on the type of system you are using. Here are a few common methods:rn rn Using the shutdown command: This command can be used to shut down a system at a specified time or after a specified delay. For example, to shut down the system immed
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