Copy pub key to remote servers using ssh-copy-id

for user in ansible root

do

for server in `cat server.txt`;  

do  

     sshpass -p "password" ssh-copy-id -o StrictHostKeyChecking=no -i ~/.ssh/id_rsa.pub ${user}@$server  

done

done

Setup ansible environment with the following directory structure.

Use Git Grep to Replace Strings in Files in Your Git Repository

On Linux:

git grep -l 'original_text' | xargs sed -i 's/original_text/new_text/g'
On Mac:

git grep -l 'original_text' | xargs sed -i '' -e 's/original_text/new_text/g'
I needed to change a string in a bunch of files and I used the command above using git grep to do it. Worked like a charm.

The -l argument to git grep only returns the file names and not the location in the file like it usually does.

The -e argument is needed with the sed portion on OSX as stated by asmeurer in the comments

Ansible Troubleshooting Tips

ansible-config dump --only-changed

How to make SSH agent running in the background

============================================================

ssh-agent: It is an authentication agent which handles all the private keys password. ssh-agent command initiates a ssh agent background program which we will be used later to store private keys password.You will notice the below output on terminal. Add the output in .bash_profile to always load it automatically.

SSH_AUTH_SOCK=/tmp/ssh-D6wit2Nad0zP/agent.7180; export SSH_AUTH_SOCK;
SSH_AGENT_PID=7181; export SSH_AGENT_PID;
echo Agent pid 7181;

After Provisioning the VM you need to install few packages like below

yum install kernel-devel
yum install gcc*



EPEL Repositories

wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

( or )

yum -y install epel-release


Ansible Tower Releases

https://releases.ansible.com/ansible-tower/setup/

subscription-manager repos --disable=rhel-7-server-optional-rpms