The RHEL 7.2 release doesn’t only bring an important Systemd update (v219). It also contains several goodies, some still to discover. Among these, two come to my mind. Firstly, several Firewalld configuration files have been added making administrator’s life easier:…
Red Hat recently released several high-quality articles about: the Benefits of Red Hat Enterprise Linux for Real Time explains what is an enterprise environment for real-time workloads, combining PTP with NTP to get the best of both worlds describes the differences between PTP and NTP, and how…
With RHEL 7, it is pretty well known that performance configuration is made easy through the tuned tool. Specifying a profile in a list or creating one from some existing can be done quickly. A tutorial already explains how to…
One week ago, Raj left a comment on this website saying the current version used for the RHCSA/RHCE exams was now RHEL 7.1. Although I had no reason not to believe him, I wanted a confirmation that I got a…
Because Red Hat is preparing its summit at the end of June, new presentations are available on several domains: Systemd: nothing new but a nice presentation, RHEL 7 Performance: a nice update about performances, Identity Management: a very detailed presentation…
To read more than 900 pages takes time and motivation. Mr Jang, Mr Orsaria and their proofreaders did a good job: there are very few typos and the quality is there. Except the lack of coverage of the LDAP server configuration, very…
Traditionally, to test the configuration of Postfix you had to install a full featured DNS server. This was due to the MX records mechanism. When you send a mail outside, the MTA (Mail Transfer Agent) sends a request to the DNS server responsible (the…
The RHEL 6.8 has just been released and brings the following main benefits: it enhances security by replacing openswan with libreswan as VPN endpoint solution, it makes integration with Active Directory easier through SSSD improvements (cached authentication lookup, authentication via…
Since Systemd v213 and consequently with RHEL 7.2, a new resource control option called CPUQuota is now available. Last year I wrote a post on the CPUShares option. I decided to revisit it with this new CPUQuota option. Caution: The…
One of the main changes that occurred in the RHCE 7 exam was the new objective regarding MariaDB. You can be a very experimented system administrator and never deals with databases. Not only you are asked to install the database…
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