Red hat linux

Setting Up an NFS Server and Client on CentOS 7

I’m using two CentOS systems here: NFS Server:, IP address: NFS Client:, IP address: Configure the Firewall firewall-cmd –permanent –zone=public –add-service=nfs firewall-cmd –reload Installing NFS and enable and start the nfs server service.(Client / Server) yum -y install nfs-utils systemctl enable nfs-server.service systemctl start nfs-server.service Exporting Directories on the Server mkdir […]


Install and Configure MySQL Cluster on CentOS 7

MySQL Cluster is designed to provide a MySQL compatible database with high availability and low latency. The MySQL Cluster technology is implemented through the NDB (Network DataBase) and NDBCLUSTER storage engines and provides shared-nothing clustering and auto-sharding for MySQL database systems. In the shared-nothing architecture, each of nodes has its own memory and disk, the […]

Red hat linux

PHP 5.6 on CentOS/RHEL 7.4 and 6.9 via Yum

To install, first you must add the Webtatic EL yum repository information corresponding to your CentOS/RHEL version to yum: CentOS/RHEL 7.x: rpm -Uvh rpm -Uvh CentOS/RHEL 6.x: rpm -Uvh rpm -Uvh Remove old php version yum remove php* Now you can install PHP 5.6’s mod_php SAPI (along with an opcode cache) […]

nagios Red hat linux

Send Nagios SMS Alert with Gnokii

Installing Gnokii Requirements – intltool-0.35.0-2.i386.rpm tar -xzvf gnokii-0.6.28.tar.gz cd gnokii-0.6.28 ./configure make make install cp -Rdp /usr/share/doc/gnokii/sample/gnokiirc /root/.gnokiirc or cp -Rdp /usr/share/doc/gnokii/sample/gnokiirc /etc/gnokiirc configure Gnokii for Wavecom GSM modem #vim /root/.gnokiirc [global] port = /dev/ttyS0 model = AT initlength = default connection = serial use_locking = no serial_baudrate = 9600 smsc_timeout = 10 [xgnokii] allow_breakage […]

Red hat linux Shell scripting

AWK and Regular Expressions to Filter Text or String in Files

AWK is an interpreted programming language. It is very powerful and specially designed for text processing. AWK – Basic Examples This chapter describes several useful AWK commands and their appropriate examples. Consider a text file marks.txt to be processed with the following content − 1) Amit Physics 80 2) Rahul Maths 90 3) Shyam Biology […]