Handy Linux Commands

1. Syntax: ansible  <pattern> -u <username> -i <inventory_file>  -m <module_name> -a <arguments>
• <pattern> : represents the group name of the list of hosts defined
• <username>: user name to override any values defined in config file
• <inventory_file>: path to the static ansible inventory file
• <module_name>: ansible modules to use
• <arguments>: arguments module to specify
2. ansible prod-webserver -u autouser -i inventory/dc_chicago -m command -a "date" /*Execute an ansible ad-hoc command  as an user*/
3. ansible-galaxy init <ansible_role_name> /*Will create a default ansible project directory structure*/
4. vim -c "<command>"  <file to execute the script on>  
   eg:- vim -c "%s/\s\+$//e"  -c "wq"  file1.txt /*Deletes space at the end of each line without prompting  error*/