Author Archives: Gkhan

Downgrade Centos 6.x Kernel Version

Posted on March 16, 2019 by Gkhan

VOS3000 2.1.4.0 does not support latest Kernel Versions. you have to downgrade Kernel

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How to stop and start ApacheTomcat VOS3000 2.1.4.0

Posted on March 16, 2019 by Gkhan

Login to your server To STOP Apache Tomcat Server # /home/kunshiweb/base/apache-tomcat/bin/shutdown.sh To START Apache Tomcat server #/home/kunshiweb/base/apache-tomcat/bin/startup.sh

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Centos 5.X yum update

Posted on March 16, 2019 by Gkhan

Update of packages using default repositories (base, update etc.) is no longer applicable.You should switch boxes, run on CentOS 5.x., to so called Vault repositories. 1- Disable base, updates and other enabled repositories (where enabled=1 is set) in the CentOS-Base.repo:  … Continue reading →

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How to Install VMware Tools on CentOS 7

Posted on October 28, 2018 by Gkhan

How to Install VMware Tools on CentOS 7 # yum install -y open-vm-tools check file is exist # ls /usr/bin/vmtoolsd Now reboot the server    

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How to check directory size in Linux

Posted on October 25, 2018 by Gkhan

How to check directory size in Linux DU command uses for disk uses you can use du command to check directory size. for example you want to check directory size of a folder “database” use -h for size in MB … Continue reading →

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How to update Centos 5 .X and cannot find a valid baseurl for repo

Posted on August 27, 2018 by Gkhan

How to update Centos 5 .X and cannot find a valid baseurl for repo If you are using CentOS 5.x and want to install any software and update CentOS 5.x  . you are getting following error . root@server1 [~]# yum … Continue reading →

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vos3000 illegal calls query to block IP address

Posted on August 23, 2018 by Gkhan

vos3000 illegal calls query to block IP address All call records are saved in e_cdr_files you can query to get ip addresses of illegal calls source. mysql> select DISTINCT callerip from e_cdr_20180818 where endreason = ‘-9’; +—————-+ | callerip | … Continue reading →

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How to configure Mikrotik DHCP Server for Cisco Phone TFTP option

Posted on August 7, 2018 by Gkhan

How to configure Mikrotik DHCP Server for Cisco Phone TFTP option 1- Change your TFTP server IP in to hex code you can use this online tool : http://www.miniwebtool.com/ip-address-to-hex-converter/ 2- Now configure Mikrotik RouterOS : /ip dhcp-server option add code=150 … Continue reading →

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How to install VMware tools in Linux Virtual Machine

Posted on July 19, 2018 by Gkhan

How to install VMware tools in Linux Virtual Machine Make sure Linux virtual machine is powered on. Click VMin the virtual machine menu, then click Guest > Install/Upgrade VMware Tools. Click OK.Note: In some cases, verify that the CDROM device is Connectedfrom within the Edit … Continue reading →

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OpenVPN CRL has expired

Posted on July 15, 2018 by Gkhan

OpenVPN CRL has expired VERIFY ERROR: depth=0, error=CRL has expired: CN=servername In order to fix the issue, we just need to recreate the crl.pem file. we need  to backup the current crl.pem file before creating a new one. The location of the  … Continue reading →

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