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Netstat Cheatsheet

To view the total number of connections to a port, run the following command in ssh netstat -tuna |...

March 13, 2019: End-of-Life for All TLS-SNI-01 Validation Support

Let’s Encrypt allows subscribers to validate domain control using any one of a few different validation methods....

Hypervisor KVM

Have you ever wondered how a cloud works? It is the most fast-growing IT-trend which attracts billions...

How To Backup Mailbox Daily, Weekly and Monthly

For backup mailbox, i am usually using zmmailbox command who has been provided by Zimbra. The command...

Installing PHP 7 on CentOS 6

Installing PHP 7 on CentOS 6 1. To install latest PHP 7, you need to...

How To Find Folder or File Older Than x Days and Move Them To Other Directory or Path

– Create folder /var/www/old_www-7days/ as destination path – Run find and move (in this case older than 7 days) to old_www-7days

How to Install JAVA 8 on Ubuntu 18.04/16.04 using PPA

There are two standard types of installation available are JDK and JRE. JDK (Java Development Kit) provides...
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Safe Reboot Of Linux Using Magic SysRq Key

If you are working on kernel development, or device drivers, or running a code that could cause a kernel panic, the SysRq...

How to set a MySQL database to read-only mode

When we need to set the database as read-only on the fly (such as rebuild MySQL replication purpose) and we will use...

How to check LDAPS certificate and TLS version

Get OpenSSL (a list of 3rd party sites here; I went with this one). The connection to your DC thus: openssl...

How to run a manual backup on cPanel

You can use the /usr/local/cpanel/scripts/pkgacct script to create a cpmove archive for an account. After you create the archive, you can then restore the account on any cPanel...