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
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
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 GB etc # du -h ./database/ 17G ./database/
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 update -y
Loaded plugins: fastestmirror
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
Eg. Invalid release/
removing mirrorlist with no valid mirrors: /var/cache/yum/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base
This is because update repositories were moved to the CentOS vault when the operating reached it's end-of-life.
Edit the following file
Continue reading How to update Centos 5 .X and cannot find a valid baseurl for repo
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 |
+—————-+
| 195.154.93.229 |
| 50.2.187.130 |
| 5.62.63.181 |
| 216.244.84.202 |
| 37.49.231.161 |
| 88.198.57.146 |
| 37.49.231.63 |
| 50.22.52.22 |
| 93.190.143.70 |
| 216.244.73.98 |
+—————-+
10 rows in set (0.00 sec)
if someone can write a script to get IP address from current date CDR for every 5 min and update the iptables automatically.
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 name=ciscotftp value=0xC0A80307
Continue reading How to configure Mikrotik DHCP Server for Cisco Phone TFTP option
How to install VMware tools in Linux Virtual Machine
Continue reading How to install VMware tools in Linux Virtual Machine
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 crl.pem file at /etc/openvpn/
#mv crl.pem crl.pem.back
Now go to easy-rsa folder
# cd easy-rsa
now generate crl.pem
# ./easyrsa gen–crl
Now copy the new crl.pem to openvpn folder
# cp –pr /etc/openvpn/easy–rsa/pki/crl.pem
Now restart openvpn service
source link :- https://www.jobishmathew.me/openvpn-crl-has-expired/
OPENVPN Logs
To troubleshoot connection issues check below logs
grep the client name in /var/log/messages
# grep VPN /var/log/messages
Check the connection time
#cat /etc/openvpn/openvpn-status.log
Check the connection negotiation activity
# tail -f /var/log/messages
How to install vos3000 2.1.4.0 on CentOS 6.X
Follow the steps
#/etc/init.d/iptables save
#/etc/init.d/iptables stop
#chkconfig iptables off
#/etc/init.d/ip6tables save
#/etc/init.d/ip6tables stop
#chkconfig ip6tables off
Continue reading How to install vos3000 2.1.4.0 on CentOS 6.X
VMware OS Optimization Tool
The VMware OS Optimization Tool helps optimize Windows 7/8/2008/2012/10 systems for use with VMware Horizon View. The optimization tool includes customizable templates to enable or disable Windows system services and features, per VMware recommendations and best practices, across multiple systems. Since most Windows system services are enabled by default, the optimization tool can be used to easily disable unnecessary services and features to improve performance.
You can perform the following actions using the VMware OS Optimization Tool:
Download latest VMware OS Optimization Tool