Browsing All Posts filed under »Tech News«


January 4, 2018


ENVIRONMENT OS = RHEL 7.4 Total HA nodes = 2 ENVIRONMENT DETAILS In this environment pacemaker is installed on both machines. Redis is installed on both machines. A Master/Slave resource group is created. 2 HA heartbeats are configured thru corosync. SUPPOSED ENVIRONMENT ACTIVITY vi /etc/redis.conf bind              # This will make sure that redis will […]

How to grep commands output in windows | grep command for windows

January 12, 2017


How to grep commands output in windows   If you want to grep specific output, use find command. Find below examples for reference.   netstat –n –a TCP                 ESTABLISHED TCP                    ESTABLISHED TCP                  ESTABLISHED TCP            TIME_WAIT TCP                                    LISTENING TCP     […]

Find out CPU, Sockets & Cores

August 18, 2016


Environment OS = Redhat Enterprise Linux Version = 5.9 Find out total CPUs & Sockets dmidecode |grep -i cpu Example output: dmidecode |grep -i cpu Version: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz Version: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz Description Above command output shows total sockets i.e., 2 and total CPU/processors installed i.e., 2 OR […]

GlusterFS (File System) Installation and configuration on RHEL/CentOS and Fedora (REPLICA Environment)

May 29, 2015


Creating GLUSTER was never too easy like I mentioned below. Follow my article Environment Centos 6.3 Nodes = 2 selinux = disabled Add host file entries on both nodes # yum install glusterfs-server # service glusterd start # service glusterd status # Create directories with same names on all servers # mkdir -p /data/brick1/gv0 # […]


March 16, 2015


The constant transformation of communication is changing in today’s world that how people interact with others. Today everyone seems connected digitally. When it comes to pay the ground breaking change was noticed since the Plastic card was introduced. The quick adoption of plastic card was convenience to use. In this century convenience is the only […]

Adding or removing LLT links without restarting LLT / Howto replace Heartbeat NIC(s) of VERITAS Cluster

February 2, 2015


Environment SFHA version = 5.1 OS = 5.9 Solaris SPARC Please freeze the cluster before doing this activity Agenda Suppose you need to replace the bge2 Ethernet with ce0   (ONLINE without restarting gab, llt and  hastop -all -force) # lltconfig -t ce0 -d /dev/ce:0 # lltconfig -u bge2 First command will add the new Ethernet […]

**ERROR** RRD: Disabled – unable to create base directory (err 13, /var/lib/ntop/rrd

September 12, 2014


ERROR while installing ntop Error **ERROR** RRD: Disabled – unable to create base directory (err 13, /var/lib/ntop/rrd Solution #sudo chown -R nobody:nogroup /var/lib/ntop (Optional)  : You may need to create a directory   ( #/var/lib/ntop# mkdir rrd ) in the response of below ERROR while running ntop **ERROR** RRD: Disabled – unable to create base directory […]