When running an email server on a Linux platform such as AlmaLinux,outgoing messages sent without domain authentication mechanisms are highly likely to be marked as spam or rejected outright by major email providers (such as Gmail,Yahoo,and Outlook).SPF an...
Below bash script is for installing gcc 4.9.4 in CentOS 7. For your information,you should have sudo permission to install the above.
You can force no caching in Apache by modifying the .htaccess file using appropriate headers.Here are a few methods:1.Disable Caching Using HeadersAdd the following to your .htaccess file to prevent browsers and proxies from caching your files:Explanation:...
In CentOS,swap is a portion of the hard drive designated as virtual memory,acting as an extension of RAM.When the system's RAM is full,inactive data from RAM is moved to the swap space,freeing up RAM for active processes.While slower than RAM,swap prevents...
On Centos 6.7,you can check IP address configuration by ifconfig command as below: .The below is the example of files on " / etc / sysconfig / network-scripts". Among above,ifcfg-eth0 and ifcfg-eth1 is wired network,and below is the reference example: .If ...
Below is server status checking code can run on LINUX.
Following code converts EUC-KR format document to UTF8. utfconvert.sh.
To successfully send emails to Gmail (and many other email providers),you need to authenticate your emails using SPF (Sender Policy Framework) and / or DKIM (DomainKeys Identified Mail).These authentication methods help verify that the email is coming from...
In CentOS 7,Postfix is a powerful and widely-used Mail Transfer Agent (MTA).It's a cornerstone of email infrastructure,responsible for sending and receiving emails on your server.Here's a breakdown of Postfix in a CentOS 7 context:What Postfix Does::Sendin...
.tmux is a terminal multiplexer for Unix-like operating systems.It allows multiple terminal sessions to be accessed simultaneously in a single window.It is useful for running more than one command-line program at the same time.It can also be used to detach...
To post remotely to Tistory (a popular blogging platform in Korea) using the CLI and curl,you need to make use of the Tistory Open API.Below is an example showing how to create a post using curl in the command line.Prerequisites:Access Token: You need to o...
STEP 1.Install Let’s Encrypt Certbot Tool.Before you can create free wildcard certificates,you need certbot installed.I’m using an CentOS Server here.To install it,run the following commands: .STEP 2.Generate Let’s Encrypt Wildcard SSL Certificate.After...
Today, while deploying our new service, we stumbled upon an intriguing method used by Amazonbot to crawl our site and randomly scrape images. By appending / ?C=M;O%3DA to the folder name and accessing it, this bot was able to grab all the files within if ...
Traceroute and Traceroute6 are both network diagnostic tools, but they are designed for different network protocols. Here's the key difference between them:Traceroute is for IPv4, while Traceroute6 is for IPv6. Depending on the network infrastructure you a...
To change permission by type (directory or file), the easiest way can do it is using find command and do something as a follow up action. To change permission for file by 0664,Note that you should put space between {} and \ To change permiss...
To check listening port on CentOS 7, you can do it by "netstat" simply, or you can try it by "ss". I was easily able to check which port is open or not on CentOS 7.The above shows its result like below:The above shows its result like below:
The default port that MySQL database server is running under Linux and Unix is 3306 / TCP. In order to change the default MySQL / MariaDB database port in Linux, open MySQL server configuration file for editing by issuing the below command.Search for the l...
If you faced an error "cannot change locale (UTF-8)", it can be simply solved to add following lines at / etc / environment
To set up an SMTP server on CentOS 7, you can use a popular mail server software called Postfix. Here are the steps to install and configure Postfix:1. Update System: Make sure your system is up-to-date by running the following commands:2. Install Postfix:...
The software utility Cron is a time-based job scheduler in Unix-like computer operating systems. People who set up and maintain software environments use cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, or interv...
I am using CentOS Linux for service purpose. Main reason to use CentOS is cheaper hosting for private purpose. Actually MySQL requires periodical optimization process in my experiences, and I use / etc / cron.hourly usually for those kind of bath processi...
In order to mount windows shared folder on CentOS, you need to install some packages like belowAnd the easiest way can mount the folder you want will be like belowIn case that you encounter error message like “mount error(12): Cannot allocate memory to th...
When using OAuth 1.0a, it requires timestamp for authentication. The followings are the example of shell commands which can set time information. Setup timezoneTo set the timezone of your system clock do the following:# rm -rf / etc / localtime# ln -...
edit the file / etc / my.cnfThe file should look like this:Increase 100,000 to the number you desire.After the setting is applied, you should restart your database.