VMLINUX

Setting up a Linux CA server is quick and easy and is a direct replacement for Microsoft CA. This article applies to both CentOS/Red Hat 6.x and 7.x versions. Let's start with installing the required packages for the CA server setup.

First need to install openssl.

# yum -y install openssl

Read more ...

SED is a very powerful utility which allows find and replace/insert text functionality. It should be used with Caution and is recommended to use dry-run before committing the changes. Below are the various commands for text manipulation.

Note: \n = for newline and \t = for TAB space and For dry run just remove "-i" from the command

 Find the pattern and Insert text AFTER

# sed -i 's/.*search 1st Line.*/&\nInsert 2nd line/' file1

Read more ...

There are instances wherein you want to generate random passwords for setting up MySQL/User credentials or use for kickstarts. There is a very simple random password generator in-built into Red Hat/CentOS. Just run the below command.

# cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 24 | head -n24 | head -n1

Read more ...

To generate a SHA256 certficate in linux all you need to do is run this openssl command and you will be ready with a PCI compliant cert. This is a standard requirement nowadays in any PCI compliant environment. This is implemented with Apache backend. Run the below command to generate .crt and .key files.

Read more ...