The exam question use smaller mount points but the tolerance is generally 30% We will skip the screen shots from gdisk/fdisk as we just did that for swap.
Read More →Category: Systems Administration
RHCSA: swap exercise
RHCSA has some practical exercises. The standards police decides you system needs another 1 GB of swap. A correct answer according to actual test students is +/- 30% So we begin: gdisk /dev/sdb Note Linux swap at /dev/sdb1 exactly 1 GB/1014 MiB vim /etc/fstab verify with: free -m
Read More →Set selinux to enforcing
According to some reports selinux might not be in enforcing mode on the system you are given. Because Red Hat and the NSA are pushing selinux the test requires it. Student beware. If getenforce is not set to enforcing take the next step vim /etc/selinux/config set SELINUX=enforcing and reboot
Read More →RHCSA Exam check and set graphical moe
Some testing victims are reporting the entire test is command line mode. This procedure may not apply there. systemctl get-default if the answer is anything else other than graphical.target above run the following command: systemctl set-default graphical.target
Read More →RHCSA SELINUX allow a apache subdirectory to be serviced
RHCSA studying. classroom.example.com 10.0.2.10 has a web server and /var/www/html/repo is where we want the yum repository to be. A little selinux problem with that in enforcing mode. yum -y install nmap ##our test dummy. The answer: chcon -R -t httpd_sys_content_t “/var/www/html/repo/” restorecon -R /var/www/html/repo Like magic yum then works.
Read More →RHCSA Network exercise
First check that network manage is enabled systemctl list-unit-files | grep -i net systemctl status NetworkManager -l | grep enp My kingdom for an easy way to go back to eth0 nmcli connection delete enp0s3 # Delete any connection from previous use of the VM nmcli connetion add connection add con-name enp0s3 type ethernet autoconnect […]
Read More →Building a RHCSA classroom server (part 2)
Click storage Live CD/DVD and lick the optical drive image and choose the same iso image you built the system with. Press okay. I needed to reboot to make the dvd visibl. Your mileage may vary. Click back into the system and log in to system as student I usually arrange the desktop at this […]
Read More →Building a RHCSA classroom server (part 1)
This article shows how to build the classroom server which most RHCSA test exercises are run against. The environment is virtual box running on a very new Macbook Pro with a modern CPU and 32 GB of Ram. We start with a dead machine transferred from the old Mac. Next we add in the CentOS […]
Read More →The firewall project
Converting a fairly elaborate iptables based firewall with proprietary anti-spam scripts to the modern firewall-command architecture without revealing any IP. First lets take a look where we started: [root@instance-5 ~]# systemctl list-unit-files | egrep “iptables|firewall” firewalld.service masked iptables.service disabled This shows iptables as disabled but a […]
Read More →Maria-db(mysql) two node installation with galera data replication
This is the first step toward unsupported installation of the NDC, New Data Cloud. To get the commercial version with full support, click here. This document takes you through the installation and creation of a two node database installation. This install was done in google compute engine but with the right band width will work […]
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