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iSCSI Configuration on RHEL 7 / CentOS 7 Step 1: First you need to create partition [root@server1 ~]# fdisk -c /dev/sdb Press ‘p’ to print partition table Press ‘n’ to create a new partition Press ‘p’ to create primary partition Type Partition Number : […] How to create OpenSSH rpm package and its upgrade In this tutorial we will create rpm package of OpenSSH version 6.7 stable version and will do OpenSSH upgrade. You may be wondering why it is required to create rpm package of OpenSSH version. The answer is because of CVE-2014-2532 . We recently notified with the […] Tags: biosdevname=0, default network device, GRUB_CMDLINE_LINUX, how to change network name to old eth0, net.ifnames=0, net.ifnames=0 biosdevname=0, Red Hat Enterprise Network name Step 1) add kernel boot args & regenerate the grub config The following kernel boot arguments need to be added: biosdevname=0 net.ifnames=0 Open /etc/default/grub with your favorite editor and add those […] The keystone CLI is deprecated in favor of python-openstackclient. UPDATE: It turns out that installing the new client can cause issues with Keystone. I found this out the hard way yesterday when it failed during a demo, preventing authentication from the command line. After a few hours troubleshooting it turns out Apache (httpd.service) and Keystone […] Securing Apache – TRACE TRACK XSS I always scan my servers every month with Openvas as one of my PCI-DSS task. And this week I locking down my Apache servers. Add this in you vhost file ore in the welcome.conf file and rerun you scan. TraceEnable off RewriteEngine On RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK) RewriteRule .* – […] Apache performance config Now on all my Apache i always load this Apache config. It enabled some apache standard performance config for Apache as a good standard. KeepAlive. Gzip all transfer and local disk cache my /etc/httpd/cond.f/01.conf NameVirtualHost *:80 NameVirtualHost *:443 #Speedning upp webres Apache config # 2 HOURS Header set Cache-Control “max-age=7200, public” # […] Downgrade with glibc Update to using YUM 1). Existing RPM version checking and backup #rpm -qa | grep glibc compat-glibc-headers-2.3.4-2.26 glibc-common-2.5-81 glibc-devel-2.5-81 compat-glibc-2.3.4-2.26 compat-glibc-2.3.4-2.26 glibc-2.5-81 glibc-headers-2.5-81 glibc-devel-2.5-81 glibc-2.5-81 2). createrepo REPODATA /usr/local/src/new_glibc # pwd /usr/local/src/new_glibc #createrepo ./ 12/12 – glibc-devel-2.5-123.el5_11.1.i386.rpm Saving Primary metadata Saving file lists metadata Saving other metadata 3). old_glibc.repo #vim /etc/yum.repos.d/new_glibc.repo […] Linux operation and maintenance of automated tools Cobbler About operating system installation automation, the earlier we use RedHat launched Kickstart to batch install the operating system, in recent years, RedHat has introduced a Cobbler. Cobbler development using Python, compact and lightweight, able to complete the installation of the system, and even manage some services. (Known […] Linux operation and maintenance of automated tools Kickstart Bulk Kickstart installation of the operating system tools, RedHat earlier launch of the product (not much to say, now playing Cobbler friends Test environment: CentOS 6.6 x86_64 minimal First, the installation package yum -y install dhcp tftp-server syslinux nfs-utils kickstart cp /usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample /etc/dhcp/dhcpd.conf […] How to install Redis on a Centos 6.5 & Centos 7.0 Server Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. How To Install Redis on Centos 7 # wget -r –no-parent -A […] |
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