Showing posts with label operating. Show all posts
Showing posts with label operating. Show all posts
Monday, September 11, 2017
Ubuntu is W3Techs Operating System of the Year 2015
Ubuntu is W3Techs Operating System of the Year 2015
Ubuntu is slowly but steadily improving its footprint in the web server space. W3Tech provides some of the most reliable data regarding the use of various technologies in the web server space. According to W3Techs latest set of data, Ubuntu is now commanding 11.1% market-share among websites whose operating system we know.
Ubuntu: W3Techs Operating System of the year 2015
Up from a meagre 4% share in 2011, Ubuntus is now used by 11.1% of all the websites whose operating system we know. This according to the latest set of web server usage statistics released by W3Techs.
This massive surge is market-share over the years are among the reasons why Ubuntu grabbed the top spot among operating systems in web-server space in the W3Techs survey 2015. Ubuntu is followed by Gentoo while Scientific Linux came in at a surprising no.3 position. Last years winner, Debian, failed to feature in the top 3. Windows on the other hand has never been able to regain its pole position since 2010.
Other open source technologies such as Wordpress, Drupal, Nginx, JQuery etc. feature prominently in the survey. Wordpress and Drupal remains the most popular content management systems in use even today. WordPress reached an impressive milestone this year by running a quarter of the web. Java was the fastest growing server-side programming language in 2015. 3.0% of all websites are built with Java, up from 2.8% last year. JavaScript is getting more and more popular as server-side technology, making it the second-fastest growing language. Nginx crossed the 25% mark in 2015, and is the web server of the year for the 6th time in a row. [Detailed report here]
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Saturday, September 9, 2017
Training Certification Red Hat Certified Architect RHCA for Red Hat Enterprise Linux Operating System
Training Certification Red Hat Certified Architect RHCA for Red Hat Enterprise Linux Operating System
Red Hat is one of linux operating system created by Red Hat, Inc. RHL (Red Hat Linux) is linux operating system are popular until production ceased in 2004.
Since 2003, Red Hat Has discontinued production of Red Hat Linux (RHL), but issued a Red Hat Enterprise Linux (RHEL) for enterprise environment (not free).
About certification, Red Hat certification was ranked as one of the top 3 skills needed many IT vendors. Red Hat certification also important like another certification: Cisco, Microsoft, or Mikrotik. If the highest certification in Red Hat is RHCA and have to take exams RHCSA (Red Hat Certified System Administrator) at the first. RHCSA is skill practice for a System Administrator (sysadmin). Then after graduation from RHCSA we can take the RHCE (Red Hat Certified Engineer) is a professional certification, then to the expert certification is RHCA (Red Hat Certified Architect).
A Red Hat Certified Architect (RHCA) is a Red Hat Certified Engineer (RHCE) who has attained Red Hats highest level of certification. An RHCA is a professional whose certification status with Red Hat is current and who has earned thee following Red Hat Certificates of Expertise:
- Red Hat Certificate of Expertise in Deployment and Systems Management.
- Red Hat Certificate of Expertise in Directory Services and Authentication or Red Hat Certified Virtualization Administrator.
- Red Hat Certificate of Expertise in Clustering and Storage Management.
- Red Hat Certificate of Expertise in Security: Network Services or Red Hat Certificate of Expertise in Server Hardening.
- Red Hat Certificate of Expertise in Performance Tuning.
Prerequisites:
To become certified, an RHCA will have demonstrated knowledge and skills in a number of areas beyond RHCE, such as those related to systems deployment, systems management, clustering, and storage management.
However, the RHCA certification offers the flexibility to demonstrate additional skills in either directory services and authentication or in managing virtualized systems. Consequently, an RHCA will have many, but not necessarily all, of the following skills:
To become certified, an RHCA will have demonstrated knowledge and skills in a number of areas beyond RHCE, such as those related to systems deployment, systems management, clustering, and storage management.
However, the RHCA certification offers the flexibility to demonstrate additional skills in either directory services and authentication or in managing virtualized systems. Consequently, an RHCA will have many, but not necessarily all, of the following skills:
- Installing and configuring a Red Hat Network Satellite server.
- Configuring users, groups, administrators, and activation keys on a Satellite.
- Creating base and child channels on a Satellite.
- Using Cobbler and Satellite to install, configure, and manage systems.
- Managing data using logical volumes and snapshots.
- Configuring high-availability clusters using physical or virtual systems.
- Configuring a GFS file system to meet performance, size, and quota objectives.
- Configuring iSCSI targets and initiators.
- Configuring a Kerberos realm.
- Configuring Red Hat Directory Server to provide a centralized directory with access control.
- Configuring Red Hat Enterprise Linux� clients to authenticate using various mechanisms, including Kerberos, LDAP, and Microsoft Active Directory.
- Configuring and managing hypervisors and virtual hosts using Red Hat Enterprise Virtualization.
- Analyzing system performance and behavior using tools such as vmstat, iostat, mpstat, and sar.
- Configuring systems to provide information using SNMP.
- Configuring runtime kernel parameters.
- Analyzing system and application behavior using ps, strace, top, Oprofile, and Valgrind.
- Configuring disk subsystems and scheduling algorithms and network buffers for optimal performance for specific requirements.RHCSA > RHCE > RHCA (Red Hat Enterprise Security: Network Services + Red Hat Enterprise Deployment and Systems + Red Hat Enterprise Directory Services and + Red Hat Enterprise Virtualization Exam + Red Hat Enterprise Clustering and Storage + Red Hat Enterprise System Monitoring and Performance Tuning Expertise Exam)
For more information you can visit http://www.redhat.com/training/certifications/rhca/
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