Add the following key-value pair with an empty line above and below it:
```
no_ssh_fingerprints: true
```
Set ssh_pwauth to false. This parameter specifies whether to enable password login in SSH mode.
```
ssh_pwauth: false
```
Add preserve_hostname: false.
```
preserve_hostname: false
```

Use the number sign (#) to comment out the following statements:

mount_default_fields: [~, ~, 'auto', 'defaults,nofail', '0', '2']
resize_rootfs_tmp: /dev
ssh_deletekeys:   0

Modify ssh_genkeytypes as follows:
```
ssh_genkeytypes: ['rsa', 'dsa']
```
Modify syslog_fix_perms as follows:
```
syslog_fix_perms: root:root
```
Add the following statements:
```
network:
   config: disabled
datasource_list: [ OpenStack ]
```
For Ubuntu 14.04, the following line does not need to be added:
```
datasource_list: [ OpenStack ]
```
Add the following statement after - final-message in cloud_final_modules:
```
- power-state-change
```

Check and modify the information in system info to make it consistent with the following content:

system_info:
   default_user:
      name: linux  //Username for OS login
      lock_passwd: True   //True indicates that login using a password is disabled. Note that some OSs use value 1 to disable the password login.
     gecos: redhat
     groups: [audio, cdrom, dialout, floppy]   // (optional) Add the user to other groups that have been configured in etc/group.
      sudo: ["ALL=(ALL) NOPASSWD:ALL"]  //Current user has all the root rights.
      shell: /bin/bash   //Execute shell in bash mode.
   distro: sles
    paths:
      cloud_dir: /var/lib/cloud/
      templates_dir: /etc/cloud/templates/
      upstart_dir: /etc/init/
    ssh_svcname: sshd

In the preceding command, change the value of distro based on the OS, such as distro: sles, distro: rhel, distro: ubuntu, distro: debian, and dustro: fedora.

(Optional) For Ubuntu 14.04, perform the following operations:
1. Use the vi editor to open the /etc/init/cloud-init-local.conf configuration file and modify the following configuration items:
```
# cloud-init - the initial cloud-init job
#   crawls metadata service, emits cloud-config
start on mounted MOUNTPOINT=/ and mounted MOUNTPOINT=/run and stopped bms-network_config
```
2. Run the following commands to configure the OpenStack source:
  dpkg-reconfigure cloud-init
  
  Run the vim /etc/cloud/cloud.cfg.d/90_dpkg.cfg command to open the configuration file and check whether the items are correctly configured in the file.
```
# to update this file, run dpkg-reconfigure cloud-init
datasource_list: [ OpenStack ]
~
~
~
```
  If the configuration file content is consistent with the preceding command output, the configuration is successful.

Cloud-Init 0.7.5