![]() ![]() ![]() The second command adds a line of text to the bottom of the file. So, try this in the terminal window: date %DĪnd, satisfied that we’re getting what we expect from the date command, we’ll integrate it into an echo command: echo "Today's date is: $(date %D)"Ī new file is created by the first command, and text is inserted into it. Then, if the echo command doesn’t do what you expect, you’ll know the issue must be with the echo syntax because you’ve already proven the command’s syntax. That way, if there is something wrong with the syntax of your command, you identify it and correct it before you include it in the echo command. One tip is to use the command on its own before you start using it with echo. We must use the dollar sign $ as though the command was a variable, and wrap the whole command in parentheses. We can use a command with echo and incorporate its output into the string that is written to the terminal window. RELATED: How to Work with Variables in Bash Using Commands With echo Using double quote marks results in the variable being interpreted-also called variable expansion-and the value is written to the terminal window.Using single quote marks results in the text being written to the terminal window in a literal fashion.echo 'My name is $my_name' echo "My name is $my_name" To have the variable value displayed, and not the name of the variable, use double quote marks. If you’ve wrapped your string in single quote marks echo will treat everything literally. You must put a dollar sign $ in front of the variable name to let echo know it is a variable. It has been assigned the value of the text “Dave.” We can use the variable name in the strings that we pass to echo , and the value of the variable will be written to the terminal window. Run the backup_home_dir.A variable called my_name has been created. The third task loops through the dir_contents.stdout_lines array and uses the Ansible copy module to copy each directory to the /tmp/ansible/ directory. This is the directory where the backup will be stored. The second task creates a new directory /tmp/ansible using the Ansible file module. The first task stores the contents of the /home/ansible directory (the directory I will be backing up) in the dir_contents variable using the Ansible register module. In this playbook, I will define three tasks. Once you are done, press X, followed by Y and, to save the backup_home_dir.yaml file. name : Backup home directory /home/ansible to /tmp/ansible ![]() name : Create a new directory /tmp/ansible name : Get home directory /home/ansible contents If you just want to print/access the password string (which is very likely), you may print/access the stdout property of the mypass variable in your playbook, as marked in the screenshot below. Same as stderr, but stderr separates the lines using newlines (\n) characters instead of arrays. Stderr_lines – An array containing each error output line of the command. Same as stdout, but stdout separates the lines using a newline (\n) characters instead of arrays. Stdout_lines – An array containing each output line of the command. This is the difference between the end and the start properties. Start – The date and time when the command began executing.Įnd – The date and time when the command finished executing.ĭelta – The time taken to run the command. Stderr – The error output of the command. The most important properties of each of the register variables are as follows:Ĭmd – The command that ran to generate the output. Well, the variable mypass is an object that contains some important properties. ![]() A password has also been generated.īut, why did the variable mypass print so many items? $ ansible-playbook playbooks/generate_pass.yamlĪs you can see, the playbook ran successfully. ![]()
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