Monthly Archives: August 2013

VMware error occurred while quiescing the virtual machine

If you encounter this error while taking snapshot or cloning the windows machine or while during V motion of machine, you need to check 3 things: 1) check whether vmware tools service is running or not and whether the tools … Continue reading

Posted in Vmware | 2 Comments

Configuring TFTP in Linux

TFTP can be used with great versatility as a network management tool and not just for saving files. TFTP servers can be used to upload new configurations to replacement devices after serious hardware failures. They also can be used for … Continue reading

Posted in Linux/CentOS | 2 Comments

Configuring the VNC server/viewer in Linux.

Overview of VNC Virtual Networked Computing, is a way of controlling a remote computer just as though you are sitting in front of it. In the Windows world it is also known as remote desktop but it’s normally referred to … Continue reading

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How to configure YUM Server in RHEL-5

1:Assign ip to the server machine [root@station1 ~]#neat-tui  2:Create  a directory in /var/ftp/ [root@station1 ~]# mkdir –p /var/ftp/pub  3:Mount the dvd [root@station1 ~]# mount /dev/cdrom  /mnt  4:Now copy the dvd in /var/ftp/pub [root@station1 ~]# cp –rvf /mnt/*   /var/ftp/pub  5:Now install … Continue reading

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XINETD

Many network enabled Linux applications don’t rely on themselves to provide restricted access or bind to a particular TCP port; instead they often offload a lot of this work to a program suite made just for this purpose, xinetd. Managing … Continue reading

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who command in linux

[root@server~]# Who root     tty1         2012-03-01 09:05 (:0) root     pts/0        2012-03-01 09:47 (192.200.1.205) [root@server~]# who –a system boot  2012-03-01 09:03       run-level 5  2012-03-01 09:03 LOGIN      tty2         2012-03-01 09:03              2659 id=2 LOGIN      tty3         2012-03-01 09:03              2661 id=3 LOGIN      tty4         2012-03-01 09:03              2665 … Continue reading

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Install Munin (Network Monitoring) in RHEL, Centos and Fedora

Munin is an open source web based network monitoring application written in Perl that displays systems and networks output in graphs using RRDtool. With the help of Munin you can monitor the performance of your systems, networks, SANS’s and applications. … Continue reading

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How to configure PXE server with YUM

STEP 1:- CONFIGURE YUM WITH FTP  [root@alex] yum install vsftpd*  createrepo* -y [root@alex] setsebool -P ftp_home_dir on     [root@alex] service vsftpd restart  [root@alex] chkconfig vsftpd on NOW COPY YOU FULL DVD OR CD IN A SEPRATE LOCATION AS  [root@alex] mkdir /var/ftp/pub/RHEL-5.2 … Continue reading

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How to Configure PXE boot Server

Assume the followings 1. Hostname : server.example.com 2. IPaddress : 192.200.1.222 3. DNS Configured (Not required for PXE boot, you can use ip address instead of hostname) 4. Path of YUM using -vg option with ftp server (i.e.baseurl=ftp://server.example.com/rhel5/ ) 5. … Continue reading

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Installing PNP4Nagios on CentOS

1. Nagios is ready Make sure nagios is ready; nagios plugins and nrpe are installed. 2. Install rrdtool rrdtool is necessary for storing nagios data, and used to draw graph be pnp4nagios.Current version of rrdtool is 1.4.7, but installs it … Continue reading

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Monitoring VMware ESXi and vSphere with Nagios

Requirements Perl 5.8 Several supporting Perl modules: Crypt-SSLeay (0.51) [Crypt::SSLeay] Data-Dumper (2.102) [Data::Dumper] MethodMaker (2.0.8) [Class::MethodMaker] XML-LibXML (1.60) [XML::LibXML] libwww-perl (5.805) [LWP] Install all the dependencies of Perl SDK. [root@nagios~]# perl -MCPAN -e shell The above command shall bring you … Continue reading

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