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Step 1: Download Samsung SCX-4623FW linux driver
Samsung SCX-4623FW Linux Driver Details
Size: 14.66 MB, GZ
Language: MULTI LANGUAGE
Version : V1.00.36_00.91
Step 2: Extract archive
tar xzfv uld_v1.00.36_00.91.tar.gz
Step 3: Install drivers
sudo sh ./install.sh
For network Samsung scanners, put your scanner’s IP address and optionally port anywhere in the file /etc/sane.d/xerox_mfp.conf:
tcp host_address [port]
Step 4: Reboot your computer
Before build this driver make sure make, gcc, linux-header and git have been installed.
Step 1: Clone brektrou repository
mkdir -p ~/build
git clone https://github.com/brektrou/rtl8821CU.git
Step 2: Build and install
sudo make install
Step 3: Check installed driver
If you successfully install the driver, the driver is installed on /lib/modules//kernel/drivers/net/wireless/realtek/rtl8821cu. Check the driver with the ls command:
ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu
Make sure 8821cu.ko file present on that directory.
Nginx [engine x] is free and open source high-performance web server. It also acts as a reverse proxy server, as well as. This page shows how to upgrade Nginx server on a CentOS 7. Continue reading “5 minute upgrade NGINX 1.12 to 1.17+ on CentOS 7 / RHEL 7”
Today I received an email from Linux Malware Detect Software on the vulnerability of my server and would like to share with you how to resolve this issue. Below is the content an email.
Important security notice,
The Linux Malware Detect installation running on server has
detected that you may be vulnerable to a critical remote code execution
vulnerability. The currently installed version of Exim MTA v4 improperly
validates recipient addresses and can allow malicious code execution to
take place. This may provide a path for malicious actors to gain root
access, remotely, to this system. This vulnerability currently has known
exploits circulating with both targeted and automated compromises taking
place against vulnerable systems.
Please upgrade Exim to version 4.92 or a known patched earlier version
immediately. Alternatively, if upgrading is not an immediate option,
consider disabling the Exim MTA service as soon as possible.
service exim stop
systemctl disable exim
chkconfig exim off
./build set exim yes
./build set eximconf yes
2. cPanel https://documentation.cpanel.net/display/CKB/CVE-2019-10149+Exim
RedHat / CentOS
LEMP (also known as LNMP) is a group of open-source software which enable a server to host dynamic websites and web applications. It consists of the Linux operating system, the (E)Nginx web server (which replaces the Apache component of a LAMP stack), the MySQL relational database management system, and the PHP programming language.
Continue reading “How to install WordPress, Linux, Nginx, MariaDB 10.3, PHP 7.3 (LEMP stack) on CentOS 7”
This tutorial shows how to install an Apache web server on CentOS 7 server with PHP (mod_php) and MySQL database. The acronym LAMP is short for Linux, Apache, MySQL, PHP.
This tutorial shows the installation of the latest PHP version 7.3 on CentOS 7.6 Continue reading “How to install Apache, PHP 7.3 and MySQL on CentOS 7.6 (LAMP)”
MySQL replication is a process that enables data from one MySQL database server (the master) to be copied automatically to one or more MySQL database servers (the slaves). Replication is asynchronous by default. Slaves do not need to be connected permanently to receive updates from the master. Depending on the configuration, you can replicate all databases, selected databases, or even selected tables within a database.
Continue reading “How to set up master slave replication in MySQL”
The YubiKey is a hardware authentication device manufactured by Yubico that supports one-time passwords, public-key encryption and authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols developed by the FIDO Alliance.
Continue reading “Yubikey SSH authentication”