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…
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…
Thanks to LetsEncrypt, using certificates doesn’t cost anything anymore. So I finally decided to make the move. I will present how to do it in a coming tutorial.
When using the new RHEL 7.2 release and running the systemctl status command, some slight changes were recently visible: # systemctl status sshd ● sshd.service – OpenSSH server daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled) Active: active (running) since…
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