Evolution of Red Hat Courses and Exams with Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 7 represents an exciting next step in the continued evolution of the product family and is perhaps the most comprehensive update in the 11 years I’ve been with the company. New tools such as systemd, firewalld, OpenLMI and others changes the paradigm for enterprise Linux administration by providing greater centralization and automation for the administrator. Other enhancements improve performance, security and scalability. Red Hat Training has substantially updated the RHCE level curriculum to integrate these improvements. The technical changes in the new release are such that even veteran, practicing Linux administrators should consider taking additional training.

In addition to incorporating new technical features from Red Hat Enterprise Linux 7, major releases provide an opportunity for Red Hat Training to make structural changes to improve our curriculum. Over the past two years we’ve surveyed our customers, partners and instructors and have been looking forward to the opportunity to make these changes. There are four enhancements I’d like to call out specifically.

1) Red Hat System Administration I (RH124) is the entry point to the Linux curriculum and is the first 5 days of the nine day curriculum leading to RHCSA certification. Based on customer feedback, we have substantially increased the command line administration approaches in the new course, diving right in on day one. In turn we will be retiring the Red Hat Command Line Administration (RH190) course.

2) Following feedback from our certified professionals community, the Red Hat System Administration III course (RH255) has been revised to include several chapters on shell scripting. The course continues to cover key network services such as Apache, DNS, iSCSI and also provides a tech preview of the new container features in Docker.

3) Perhaps the change I’m most excited about is the new Red Hat Certification Lab course (RH300) which replaces the flagship RHCE Rapid Track Course which first ran 15 years ago. The reality is that as Linux has become a true enterprise platform, the requirements to be a Red Hat Certified Engineer have grown commensurately. Red Hat’s courses are dense and its simply not possible to cover the thirteen days of content in Red Hat System Administration I, II and III in four days.

The new Red Hat Certification Lab course seeks to meet the very specific needs of students who have completed their training and desire practice before taking the RHCE exam. Students will spend 80-90% of their time “in labs”, complimented by a handful of lectures by an instructor on key new functionality like systemd, firewalld and the new boot process. Labs will be self-paced, with the instructor serving more as a teaching assistant as students require assistance. Students will have access to the full set of labs for both the RHCSA Rapid Track course (RH200) and the Red Hat System Administration III (RH255), providing comprehensive coverage for the competencies which are presented in the RHCSA and RHCE exams.

4) Over the past four years live virtual training (VT) and self-paced training have become primary delivery methods for our customers. To address those needs, the updated course materials and labs were redesigned to be completely inter-operable between different modalities, ensuring our customers get the same learning experience. Our self-paced training platform, Red Hat Online Learning (ROLE), is ready to deliver the System Administation I & II courses and the RHCSA Rapid Track globally via six Amazon EC2 data centers. The System Administration III course and the RHCE Certification Lab will be available in coming weeks as will translations of all five courses into eight other languages.

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 Article Source - http://servicesblog.redhat.com/2014/06/10/evolution-of-red-hat-courses-and-exams-with-red-hat-enterprise-linux-7/

Some Amazing tips for networking with nmcli

When team interface is up you can check that how many interface is connected :
[root@localhost ~]# teamdctl  team0 state
setup:
runner: activebackup
ports:
ens6
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
ens7
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
runner:
active port: ens6
[root@localhost ~]#
Note: Here two different ports are connected ens6 , ens7
To disconnect any ports :
=======================
[root@localhost ~]# nmcli  device  disconnect ens6
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# teamdctl  team0 state
setup:
runner: activebackup
ports:
ens7
link watches:
link summary: up
instance[link_watch_0]:
name: ethtool
link: up
runner:
active port: ens7

Article Source - http://www.rhce.co.in/amazing-tips-networking-nmcli/

Tips For Restoring Permissions and ownership of Files in Redhat 6/7

Problem:
=======
Permissions and Ownership on critical system files (in /etc/) directory modified. This may cause the system to not boot, lots of errors and Kernel Panic.
cause:
=====
Someone accidentally typed chmod -R 777 /etc
Solution:
=========
The RPM package manager maintains a database for all files that it installs onto the system. This includes information such as the filename, installation path, owning package and the file system ownership and permissions (including SELinux file context information). In the event that ownership or permissions are inadvertently changed, for example, through accidental misuse of the chown or chmod commands, it is possible to revert these to their values as stored in the database.
1. To re-set ownership and permissions for all packages on the system:
root@ubuntu12:~# rpm –setperms -a
root@ubuntu12:~# rpm –setugids -a
2. To re-set ownership and permissions for a specific package on the system
root@ubuntu12:~# rpm –setperms <package name>
root@ubuntu12:~# rpm –setugids <package name>
……………….OR …………..
1) To reset uids and gids on files and directories :
root@ubuntu~:# for u in $(rpm -qa); do rpm –setugids $u; done
2) To permissions on files and directories
root@ubuntu12:~# for p in $(rpm -qa); do rpm –setperms $p; done

Article Source - http://www.rhce.co.in/tips-for-restoring-permissions-and-ownership-of-files-in-redhat-67/

Commandments of RHEL 7

 RedHat breathed new life to the Red Hat Enterprise Linux Operating system there by giving birth to enthralling RHEL 7 which transcends the boundaries of an OS with vessels for containerized applications. Hence RHEL 7 is no longer just a simple OS but an abstracted component in the larger RedHat ecosystem. For a flawless understanding of the significant features of RHEL 7 it would be better to go through the following 10 Red commandments 

• RHEL 7 offers an increased support for hosting Virtualized Windows server Edition than RHEL 6 and with an updated SAMBA 4, RHEL 7 is almost a member of Microsoft network 

• RHEL 7 has the responsibility of an OS subscription model which is tuned for a stable business deployment. It prevents instance of being out of support or highly re configured.

• RHEL 7 is a huge pile of code, running 4.3GB in the DVD ISO 

• Red Hat’s support of Linux containers (LXC) which helps the users to deploy Type-2, OS-based virtualization, rather than Type-1 bare metal hypervisors. LXC allows the container to be both lightweight and highly isolating.

• RHEL 7 support project atomic which allows moving a workload from one OS to another as transparent to workload. This becomes the job of relationship stack components especially open stack. Thus once an app tests successfully as an isolatable container instance, it can become a package, much as software appliances are found and deployed.

• RHEL 7 now uses the xfs file system instead of ext4 by default. This means that RHEL can handle extremely large file systems, as much as 8 exbabyte.

• RHEL 7 offers a tighter link to Active Directory. Hence those looking for a cross platform compatibility with Windows active directory receive new Kerberos support that allow them to do this.

• RHEL 7 is easier to install and deploy: The RHEL 7 kernel update to 3.20 is similar to Canonical’s implementation. In terms of distribution RHEL7 slightly easier to deploy on bare metal, and about the same on VMware, Hyper-V, and Citrix XenServer. 

• RHEL 7 is built for business environment at the installation time one should choose from several type of base environment like minimal, infrastructure server, file and print server, basic web server, virtualization host etc.

• RHEL 7 in peppy in terms of performance Gnome is very dynamic. And optimization of varying roles could be well documented. RedHat can increase output through a new feature of network port teaming.