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rename command in linux

rename command in linux
rename command similar with mv command. This command is slightly more advanced than mv  command. How to rename multiple files in linux. T...

How to setup OpenVPN Server on Centos 7

How to setup OpenVPN Server on Centos 7
In this tutorial, I will setup OpenVPN Server on Centos 7.   Step 1: Prepare install OpenVPN server sudo yum update -y sudo yum insta...

Failed to create the VirtualBox COM object solve problem

Failed to create the VirtualBox COM object solve problem
Someday, your Virtualbox not start and the display error "Failed to create the VirtualBox COM object". it got somewhat corrupted...

How to connect openvpn server from a linux computer

How to connect openvpn server from a linux computer
Connect access server (VPS) from a linux computer. In this tutorial, I will access server VPS installed OpenVPN server from a linux compute...

Split a string in shell and get the last field

Split a string in shell and get the last field
How to split a string in shell and get the last field. in this tutorial, i written a small program use bash script split string /www/huu/pha...

Lock and Unlock zimbra account from command line

Lock and Unlock zimbra account from command line
How to Lock and Unlock zimbra account from command line. some account sending email spam, you are administrator to need lock account from c...

Linux diff command

Linux diff command
In this tutorial, I use diff command output on screen. How to compare different line by line in  files. How to compare side by side, color ,...

Postfix only allow whitelisted Recipient Domain

Postfix only allow whitelisted Recipient Domain
In this tutorial, How to Configure "Postfix only allow whitelisted Recipient Domain". We test environment with user data. To minim...

Bash script arguments from a file content

Bash script arguments from a file content
In this tutorial, how to change string content of file as arguments. I written  Bash script arguments from a file content as below: Input f...

Bash script argument default value and takes optional input arguments

Bash script argument default value and takes optional input arguments
In this tutorial, I have written bash script Bash script argument default value and takes optional input arguments. Using $# argument to i...