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…
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…
Most system administrators know the tail command. By default, it displays the 10 last lines of a file. The -f option is less known. Besides displaying the last 10 lines of a file, it mainly provides a way to watch…
Many people who had registered to buy the new version of Michael Jang‘s book for the RHEL 7 just received an email today announcing its publication on March 31. This new edition was expected since the beginning of last year…
When preparing an exam like the RHCSA or the RHCE exams, it is relatively difficult to remember the commands with all their options, the configuration procedures with all their details, and finally the mistakes to avoid. This is even worse…
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