RHCA (Red Hat Certified Architect) certified

Summary Passed five Red Hat exams and earned my RHCA certificate. It took me one and half years to attend the training and sit the exams. Five exams Red Hat CloudForms Management Engine 3.1 Red Hat Enterprise Linux OpenStack Platform 6.0 Red Hat Enterprise Virtualization 3.5 Red Hat Openshift Container Platform 3.4 Red Hat Storage […]

Samsung ARTIK 530 GPIO PIN programming

Summary Tested ARTIK 530 on the GPIO function, implemented the switch to control the LED light on and light off, with successful result. ARTIK 530 LED and Switch GPIO For ARTIK 520, the board already implement an LED circuit, so no need to prepare the switch and LED, the GPIO number shows as below, on-board […]

ARTIK 530 use Eclipse IDE for Windows

Summary Tested on Windows Eclipse IDE cross compiling, download the elf file to ARTIK 530, and execute, with successful result. Install and setup Eclipse IDE Follow this link, to install Eclipse ARM Plug-ins and GCC cross compiler. Install Eclipse and its ARM Plug-ins Install the GCC Linaro Cross Compiler The configuration is as below, Project […]

Samsung ARTIK Wi-Fi Client Configuration

Summary Setup Samsung ARTIK Wi-Fi Client, and configured auto connect to Wi-Fi after reboot, with successful result. ARTIK 530 attached the Antenna, Wi-Fi Client Configuration Follow this Link to configure the Wi-Fi Client, the ifcfg-eth0 configuration is setup already as below, [root@artik ~]# cat /etc/redhat-release Fedora release 24 (Twenty Four) [root@artik ~]# [root@artik ~]# cat […]

Samsung ARTIK 530 Image Update

Summary Setup the ARTIC 530 board, update the image, successfully start up. Received the package as below, ARTIK 530 Image Update Detail procedure to update the ARTIK 530 Image refer to this link and this link. Download ARTIK 530 Firmware Image A530-OS-1.0.0. Use Etcher to prepare the Micro SD card. SW402-4 must be ON for […]

RHEL6 LDAP server configuration issue and solve

Summary Encountered quite a few problems when configure LDAP simple server on RHEL6, resolved all the issues through the internet. Refer to the reference link for more detail. Problem and resolve no DB_CONFIG file bdb_db_open: warning – no DB_CONFIG file found in directory /var/lib/ldap: (2). By copy the DB file to the relative folder, solved […]

Embedded Linux S3C2440 Environment Startup

Summary Powering Up The Board Logging In and Exploring Reference Summary Summarize the Embedded Linux S3C2440 board startup, for the environment setup, can refer to another blog entry. Powering Up The Board Use the Xshell to login the Fedora, connect the serial port, and use minicom command to start the minicom, [root@localhost ~]# minicom Result […]

VMWare Workstation 10.0.4 install guest tool on RHEL7

Summary install GCC and kernel-devel require to remove open-vm-tools Error struct dentry has no member named d_alias Error struct dentry has no member named d_count successful result Reference Summary Installed the Vmware tool in the RHEL7 guest system, during the installation, encountered compiling problem for vmhgfs application (for file share between host and guest system). […]

Embedded Linux S3C2440 environment setup

Summary Create Virtualbox image from USB image USB to serial port usage use putty as hyper terminal Use minicom in Fedora Linux Network connection between S3C2440 and Virutalbox USB connection between S3C2440 and Virtualbox Reference Link Summary Setup the embedded Linux S3C2440 environment recently, by using Fedora Linux system in Virtualbox, the USB to serial […]

AWS RHEL7 virbr0 and firewalld iptables

I reboot the RHEL7 on the AWS, the ftp and httpd was not working, ftp cannot connect and http://54.169.139.195/ website cannot open, was checking where the problem was, 1, checked the ftp and httpd service is up and running.. all are working fine. service httpd status service vsftpd status netstat -ntulp | grep httpd netstat […]

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