VMware ESXi Datastores refresh issue incorrect free space
We do manual datastore scan or HBA scan to show the correct free space .
We can change the refresh interval manually to edit config.xml file in esxi host.
To change the refresh interval, edit the configuration file and change the
refreshInterval value to the desired interval.
To change the
- Using a text editor, open the
/etc/vmware/hostd/config.xml file on the host.
- Locate the
<datastore> element. This element in the default file is similar to:
<!-- default datastore inventory-->
<!-- <inventory>/etc/vmware/hostd/datastores.xml</inventory> -->
<!-- default datastore refresh interval in minutes -->
<!-- use 0 to disable the auto refresh -->
<!-- <refreshInterval>0</refreshInterval> -->
<!-- default datastore list refetch interval, after getting a VMFS event, in seconds-->
<!-- <refetchVMFSDatastoreListInterval>30</refetchVMFSDatastoreListInterval> -->
- Remove the comment indicators and replace the 0 (zero) in the
<refreshInterval> element with the desired number of minutes. For example, to set the refresh interval to one hour, change this line:
<!-- <refreshInterval>0</refreshInterval> -->
- Save and close the file.
- Restart the hostd service for the changes to take effect.
- /etc/init.d/hostd restart
Continue reading VMware ESXi Datastores refresh issue incorrect free space
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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
Continue reading Cacti Table ‘host’ is marked as crashed and should be repaired
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:
Continue reading Could not create the java Virtual Machine
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.
For demo I am going to install CentOS 5.5 32 bit
1- I went to following directory
Continue reading How to install CentOS on Remote Server or VPS
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
iptables -t nat –line-numbers -L
Delete rule no 6
iptables -t nat -D PREROUTING 6
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
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.
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
Continue reading How to enable ESXi SSH And ESXi Shell Using PowerCLI
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
[firstname.lastname@example.org ~] 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.