OSticket : Thank you Page is not Displaying? Solution : Checked the Admin Panel and Found that there is a SMTP error. Connection to ...

zabbix 3.2 -- Delaying  sending alert e-mails? Issue: Alerts are delayed from Zabbix. it was arround 30 mins late arriving to the Ad...

New zone record not getting published in bind? 1. Checked the general.log and found that zone file has a Ownership issue. zone exam...

To download the Oracle Linux Yum Server repository configuration file For OEL 5 & OEL 6 As root, change directory to /etc/yum.repos.d...

How to delegate a domain to another Name Server in Bind? 1. Edit the parent domain DNS file. 2. Remove the A record if any. 3. Declare ...

Error:  WARNING: Connect failed: DBERROR: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exce...

Empty set error in MySQL while Importing DB? Error: MariaDB [(none)]> use exampledb Database changed MariaDB [exampledb]> show t...

How to Create New user and Give access to it in mariaDB/MySQL? 1. Go to MySQL Prompt. mysql -u root -p 2. At MySQL Prompt choose ...

Folders Everything has a limit. So do the File Systems. At standard 4KiB block size, the 32-bit Ext3 has a limit of 16TB for a volume.  ...

Fatal Error: Contact system administrator  . Unable to connect to Database : OS Ticket osticket php Cause: You would get this err...

How to Open SNMP through iptables? [root@example ~]# iptables -I INPUT -p udp -m udp --dport 161 -j ACCEPT [root@example ~]# iptable...

How to Add MySQL Graphs to Cacti? 1. Download the Percona MySQL Graph template for cacti. 2. Create a MySQL user with the SUPER and PRO...

Ever Wondered why your Windows 7 C:\ is taking too much space and you do not have any clue about it. Let's check out Possible causes. ...

How to Add MySQL/MariaDB to zabbix monitoring ? Its important to monitor your Database. Be it availability, DB size etc. We can mo...

Error: ERROR: diskgroup DB_DATA was not mounted ORA-15032: not all alterations performed ORA-15040: diskgroup is incomplete ORA-15042: ...

How to Remove a  module from Puppet? If you have installed a puppet module on a specific path , then you have to uninstall it with ...

Install Puppet Client in RHEL 7 1. Get the Repo wget http://yum.puppetlabs.com/puppetlabs-release-el-7.noarch.rpm 2. Install...

Nagios : Return code of 255 is out of bounds You must be knowing or faced this issue if you are using nagios . I've come across this ...

How to upgrade jenkins Plugin ? 1. Go to manage Jenkins. 2. Go to Plugin Manager 3. Select all the plugins you want upgrade. 4...

 How to Enable Intel VT-x and EPT or AMD-V and RVI on VMware VM?  Virtualized HV is fully supported for virtual hardware version 9 or 10 ...

Error: We are facing this issue while mounting a CIFS share on Linux Server. mount error(13): Permission denied Refer to the mount.cifs...

DB Server is not going Down After a reboot 1. Check the uptime. If it is  Showing unexpected time then server is not rebooted. 2. ...

Script for cacti database Backup Cleanup This small script can be used for multiple thing. I'm using this for our cacti DB backup cl...

Think of a situation that you extended the LUN from Storage. Then you need to rescan the device and found that there many controller availa...

Error :  skip_dev_dir: Couldn't split up device name Error in LVM Cause: The device name you are using in the lvextend Command is...

Linux LVM Extend a File system Which is in Mulitipath . You might have been faced multiple issues with LVM and must already be know t...

Keepalived  : How to set E-mail Alert & Service Check  Configuration:   Please add following configuration to  /etc/keepalived/...

How to setup Keepalived Setup in Linux Server? Keepalived  provides simple and robust facilities for load balancing and high availab...

How to install PFX certificate in Linux and without PEM Passphrase You must be Annoyed seeing the certificate error in web browser for...

How to Remove GNOME from Linux  GDM is the GNOME Display Manager for Linux. Let's See How to remove it RHEL 7. 1. You can check ...