### 1. Setup ssh key on server

follow this guide
https://support.atlassian.com/bitbucket-cloud/docs/set-up-an-ssh-key/

or

`ssh-keygen`
eval $(ssh-agent) 
`ssh-add ~/.ssh/<private_key_file>`

Go to Bitbucket -> repo -> repo-setting-> -> Pipelines -> Settings
Enable pipeline

Go to Bitbucket -> repo -> repo-setting-> Access Keys -> Add Key
copy public key
`cat ~/.ssh/id_rsa.pub `

`ssh -T git@bitbucket.org`
The command message tells you which of your Bitbucket accounts can log in with that key.
If there any issues run below command (Permission denied (publickey))
`ssh-add -l`
`ssh-add ~/.ssh/<private_key_file>`

Go to Bitbucket -> repo -> repo-setting-> Access Keys -> Known hosts
Add IP address of the server and click on Fetch and Add Host

=============================================================
### 2. Update remote url

Go to project directory 
`git remote -v`

set ssh format url
`git remote set-url origin git@bitbucket.org:<workspace_ID>/<repo_name>.git `

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

### 3. Bitbucket pipeline settings (variables)

Go to Bitbucket -> repo -> repo-setting-> -> Pipelines -> Repository variables
Name: SSH_USER
Value : centos (server username)
Name: PORT
Value: 22
Name:SERVER
Value: IP address
untick secured 

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

### 4. Bitbucket pipeline settings (SSH Keys)

Go to Bitbucket -> repo -> repo-setting-> -> Pipelines -> SSH Keys
Click on Generate keys
Copy public key to ~/.ssh/authorized_keys on the remote host
(login to server and go to above path and edit file with nano and paste the public key in new line)

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

### 5. create file and copy below code.

```
# This is a sample build configuration for PHP.
# Check our guides at https://confluence.atlassian.com/x/e8YWN for more examples.
# Only use spaces to indent your .yml configuration.
# -----
# You can specify a custom docker image from Docker Hub as your build environment.
image: php:7.1.29

pipelines:

  branches:
    production:
      - step:
          name: Deploy to production
          deployment: production
          script:
            - echo "Deploying to production environment"
            - pipe: atlassian/ssh-run:0.2.2
              variables:
                SSH_USER: $SSH_USER
                SERVER: $SERVER
                #SSH_KEY: $MYKEY
                PORT: $PORT
                COMMAND: "/var/folder-name/deploy.sh" ```
```

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

### 6. Sh script

Note: 
for centos
`#!/bin/sh`
for ubuntu
`#!/bin/bash`

Bash path must be same than results of:
$ which bash

```
#!/bin/sh

repos=( 
  "/var/www/project1"
  "/var/www/project2"
)

echo ""
echo "Getting latest for" ${#repos[@]} "repositories using pull"

for repo in "${repos[@]}"
do
  echo ""
  echo "****** Getting latest for" ${repo} "******"
  cd "${repo}"
  git pull
  echo "******************************************"
done