Select your Cisco Switch

Posted on July 5, 2017 by Gkhan

Select your Cisco Switch

Quickly identify the right Cisco switch for your needs—whether you’re acquiring a new switch or upgrading an old one.

Just answer a few simple questions and get your results. It’s that easy, so let’s get started.

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Cacti Table ‘host’ is marked as crashed and should be repaired

Posted on July 3, 2017 by Gkhan

Cacti Table ‘host’ is marked as crashed and should be repaired

My Cacti server lost all host information and on monitor tab its showing error  “Table ‘host’ is marked as crashed and should be repaired”

I tried google got below solution that worked for me .I got my all devices back to monitor.

go to cli directory    /var/www/html/cli/

and run command  “php repair_database.php”

[root@localhost ~]# cd /var/www/html/cli/

[root@localhost cli]# php repair_database.php
Repairing All Cacti Database Tables
Repairing Table -> ‘cdef’ Successful
Repairing Table -> ‘cdef_items’ Successful
Repairing Table -> ‘colors’ Successful
Repairing Table -> ‘data_input’ Successful
Repairing Table -> ‘data_input_data’ Successful
Repairing Table -> ‘data_input_fields’ Successful
Repairing Table -> ‘data_local’ Successful

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Could not create the java Virtual Machine

Posted on July 2, 2017 by Gkhan

Could not create the java Virtual Machine

 

 

 

 

 

 

When that happens, the easiest solution that has been tested on Windows XP, Windows 7 and Windows 8 is:
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How to install CentOS on Remote Server or VPS

Posted on June 29, 2017 by Gkhan

How to install CentOS on Remote Server or VPS

If you want to install CentOS remotely on server on slow link  even if you are able to mount the CentOS  installation media as DVD iso .It takes lots of time and some time corrupted installation .

Linux is having a feature Netinstall you can use that feature and install the CentOS as version you want.

1- Download the Netinstall bootable media ISO file version you would like to install.

http://archive.kernel.org/centos-vault/

For demo I am going to install CentOS 5.5 32 bit

1- I went to following directory

http://archive.kernel.org/centos-vault/5.5/isos/i386/

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How to Show All NAT Tables Rules IPTABLES

Posted on May 24, 2017 by Gkhan

How to Show All NAT Tables Rules IPTABLES

iptables -t nat -L
iptables -t nat -L -n -v | grep 'something'
iptables -t nat -L -n -v

The netstat-nat command display the natted connections on a Linux iptable firewall

yum install netstat-nat

# netstat-nat -n
To display SNAT connections, run:
# netstat-nat -S
To display DNAT connections, type:
# netstat-nat -D

List NAT 

iptables -t nat –line-numbers -L

Delete rule no 6 

iptables -t nat -D PREROUTING 6

 

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How to scan HBA Vmware ESXi Vmware Power CLI

Posted on May 23, 2017 by Gkhan

How to scan HBA Vmware ESXi Vmware Power CLI

Connect to your ESX or VCenter Server

Connect-VIServer -Server 192.168.1.10  -Protocol https -User Administrator@vsphere.local -Password P@ssw0rd

To Scan all ESXi hosts is Cluster
Get-Cluster ‘cluster name‘ | Get-VMHost  | Get-VMHostStorage -RescanAllHba

To scan single ESX  host

Get-VMHost ‘192.168.1.11‘ | Get-VMHostStorage -RescanAllHba

 

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How to Bring Up a SVI Interface Cisco Switch

Posted on May 22, 2017 by Gkhan

How to Bring Up a SVI Interface  Cisco Switch

SVI must meet all of the following conditions to transition to the full “up/up” state.

1- The VLAN must exist and be active in the VLAN database.

2- At least one switched port in the VLAN (access or trunk) must be up.

3- That port must be in the STP forwarding state.

Sometimes it is necessary to have that VLAN interface up even if there are no devices or ports using that VLAN

simply forced the VLAN into an “up/up” state.  Issuing the “no autostate” command on the VLAN interface will bring the interface up.  Basically, the command just tells the VLAN interface to ignore the above mentioned prerequisites.  Note: This command is only available in certain IOS images.

Source link 

 

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How to enable ESXi SSH And ESXi Shell Using PowerCLI

Posted on May 18, 2017 by Gkhan

How to enable ESXi SSH And ESXi Shell Using PowerCLI

Connect to the VCenter Server

 

#Connect to VCenter Server 
Connect-VIServer -Server 192.168.10.1 -Protocol https -User Administrator@vsphere.local -Password P@ssw0rd

#Now Check which serveries are running and you want to start or stop
Get-VMHost 192.168.10.11 | Get-VMHostService


Now you will get slimier  to below screen


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no “setup” command found in CentOS minimal install


			

				Posted on April 14, 2017 by Gkhan			


					

				
no “setup” command found in CentOS minimal install


In Minimum Install this will not get install


If we got below Error, we need to install some packages to get work with setup command


[root@gkhan.in ~] setup
-bash: setup: command not found



Here we can see how to install in minimal install


yum install setuptool -y
yum install system-config-network* -y
yum install system-config-firewall* -y
yum install system-config-securitylevel-tui -y
yum install system-config-keyboard -y
yum install ntsysv -y



Now we can use the setup utility, That’s it.

							

	
			

									
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NAT information saved in Elastix by FreePBX


			

				Posted on April 8, 2017 by Gkhan			


					

				
NAT information saved in Elastix by FreePBX


/etc/asterisk/sip_general_additional.conf




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