EEM making a script more dynamic and automated. Created by fsebera on 12:18 PM. Hello!I'm looking for a way to make my EEM script more dynamic and automated for my environment. This is what I have - basically I just capture the 4 IPSec peer IP addresses of each neighbor and insert this data into 4 different variables. Best test case templates and examples: description of test case, main types of test cases, the structure of a test case. And other main possibilities of EasyQA test management tool in 2018. Below is an example ttl script for users with a switch/router. To reiterate one of the advantages of using a ttl script is that you can share boards between team members without wrenching their boot settings. This ttl script has been tested in the DVSDK 1.40 environment.
-->Syntax
Description
The Set-DnsServerResourceRecord cmdlet changes a resource record object located in a Domain Name System (DNS) zone.You can use the OldInputObject parameter to specify a resource record object that you want to change and NewInputObject to specify a new resource record.This cmdlet cannot change the Name or Type of a DNS server resource record object.
Examples
Example 1: Change the timespan of a resource record
In this example, the time to live (TTL) value of the resource record named Host01 in the zone named contoso.com is changed to 2 hours.
The first command assigns a resource record named Host01 in the zone named contoso.com to the variable $OldObj.
The second command copies the variable $OldObj to a new variable $NewObj using the .Clone() method.
The third command sets the TTL time span for $NewObj to 2 hours.
The fourth command changes the properties of $OldObj to the settings specified for $NewObj in the previous command.
Parameters
-AsJob
Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.
The cmdlet immediately returns an object that represents the job and then displays the command prompt.You can continue to work in the session while the job completes.To manage the job, use the
*-Job
cmdlets.To get the job results, use the Receive-Job cmdlet.For more information about Windows PowerShell background jobs, see about_Jobs.
Type: | SwitchParameter |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Runs the cmdlet in a remote session or on a remote computer.Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet.The default is the current session on the local computer.
Type: | CimSession[] |
Aliases: | Session |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Specifies a DNS server.If you do not specify this parameter, the command runs on the local system.You can specify an IP address or any value that resolves to an IP address, such as a fully qualified domain name (FQDN), host name, or NETBIOS name.
Type: | String |
Aliases: | Cn, ForwardLookupPrimaryServer |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Prompts you for confirmation before running the cmdlet.
Type: | SwitchParameter |
Aliases: | cf |
Position: | Named |
Default value: | False |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Specifies a DNS server resource record object to overwrite the OldInputObject parameter value.
Type: | CimInstance |
Position: | 3 |
Default value: | None |
Accept pipeline input: | True |
Accept wildcard characters: | False |
Specifies a DNS server resource record object.
Type: | CimInstance |
Position: | 2 |
Default value: | None |
Accept pipeline input: | True |
Accept wildcard characters: | False |
Returns an object representing the item with which you are working.By default, this cmdlet does not generate any output.
![Ttl Script Examples Ttl Script Examples](/uploads/1/1/8/3/118302677/799200840.jpg)
Tera Term Script Examples
Type: | SwitchParameter |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Specifies the maximum number of concurrent operations that can be established to run the cmdlet.If this parameter is omitted or a value of
0
is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer.The throttle limit applies only to the current cmdlet, not to the session or to the computer.Type: | Int32 |
Position: | Named |
Default value: | None |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Teraterm Ttl Script Examples
Specifies the virtualization instance in which the zone will be added.A virtualization instance is logical partition in a DNS Server, which is capable of independently hosting zones and zone scopes.Same name zones and zone scopes can be hosted in different virtualization instances.This parameter is optional and if not provided it will add the zone into the default virtualization instance which is functionally equivalent to a standard DNS server.
Type: | String |
Position: | Named |
Default value: | None |
Accept pipeline input: | True |
Accept wildcard characters: | False |
Shows what would happen if the cmdlet runs.The cmdlet is not run.
Type: | SwitchParameter |
Aliases: | wi |
Position: | Named |
Default value: | False |
Accept pipeline input: | False |
Accept wildcard characters: | False |
Specifies the name of a DNS zone.
Type: | String |
Aliases: | ForwardLookupZone |
Position: | 1 |
Default value: | None |
Accept pipeline input: | True |
Accept wildcard characters: | False |
Specifies the name of a zone scope.
Type: | String |
Position: | Named |
Default value: | None |
Accept pipeline input: | True |
Accept wildcard characters: | False |
Inputs
Outputs
The
Microsoft.Management.Infrastructure.CimInstance
object is a wrapper class that displays Windows Management Instrumentation (WMI) objects.The path after the pound sign (#
) provides the namespace and class name for the underlying WMI object.Related Links
Next, in a slightly more useful example, let’s study about a script to ping a specified IP address and record the results in a log.
Here, let’s assume that the scripts indicated as examples are all saved as executable files.
Execute a router command
With the Lua script function, the rt.command function to execute normal router commands from script is provided as a library. Thus, you can execute a ping by calling the pingrouter command using the rt.command function.
[Ping1.lua] Download
How was that? Were you able to ping? When it is not possible to reach the destination IP address, nothing is displayed, so in that case rewrite the address to the IP address that is reachable for “192.168.100.100” and try again.
Now, we will explain the script. First, the first line executes the router’s ping command.
The rt.command function interprets a string given as an argument as a router command and executes it. Additionally, the rt.command function returns 2 values as return values. The first return value shows that the string is properly interpreted as a command and whether or not the command was executed. The second return value is the command output result or an error message. In this example, they are respectively assigned to flag and outputs variables.
In line 2, the value of the flag variable in the if statement is examined.
In an if statement, when the value of the formula between if and then is true, the statements in the interval between then and end are executed. The expression in this example is merely a flag so it becomes an execution result of the rt.command function, and if the format of the command is proper and the command is executed, it will be true.
In the 3rd line, just the first line of the output results of the ping command is extracted.
In the outputs variable, all the output results of the ping command are included as a string, so, in order to extract only the first line from there, the string.match function is used. Then, the extracted result is substituted for the first_line variable.
For specifics of use of the string.match function, you should look at the Library Function Explanation, with the understanding here that if you write it as per this example the first line will be extracted.
The results are displayed in the 4th line.
Results are displayed using the print function. You can simply display such character strings using the print function.
The 5th line from the end is an end statement that displays the end of the if statement on the 2nd line.
Use of command arguments
With this script, the party to “ping” is fixed at “192.168.100.100”. Next, let’s try making it possible to specify the IP address when executing lua command.
[ping2.lua] download
With “ping2.lua,” we made it possible to designate the IP address by an argument when running a script with the lua command. In the first line of the script, the 1st argument is substituted for the variable dst.
“arg” is a variable that expresses the argument specified by the command, and arg[1] is the first argument, arg[2] is the second argument and arg[N] becomes the Nth argument.
The 2nd line executes the “ping” command.
Compared to “ping1.lua,” the argument given to the rt.command function is changed. The string called ' ping -c 1 “ and variable dst are concatenated with the .. signal and become one string.
The symbol ..is called a “string concatenation operator,” and this symbol can form a single string by concatenating two strings, before and after it.
The third line and lines thereafter are exactly the same as for “ping1.lua.”
if~then~else
So, for “ping2.lua,” the designation of the correct IP address for the argument of the lua command is a condition, but if the wrong argument is given as the IP address, what will happen?
Nothing will be displayed, will it? This is because the rt.command function, which is executing the “ping” command, has failed due to a grammatical error. So, even in that case, let’s try displaying something.
[ping3.lua] download
Ok, how was it this time?
An error string was displayed, wasn’t it? In “ping3.lua”, the else section from the 6th line and 7th line are added to “ping2.lua”.
In an if statement, when the value in the value of the formula between if and then is true, the statement after then is executed. Additionally, statements after else are executed when the value of the formula is false. This time the “ping” is a grammatical error, and because the flag, which is the rt.command function return value, is false, the if statement executes the else section and displays the error message.
Function definition and call
Only one IP address could be specified with “ping3.lua” on the command line. Next, let’s set it to ping multiple parties.
[ping4.lua] download
So, let's try executing “ping4.lua.”
In “ping4.lua,” almost the same thing as “ping3.lua” is enclosed by the function ping(dst)~end. In this way, a chunk of code enclosed by function~end is called a “function.” In this case, the name ping is attached to the function, and afterward when this name is used to call the function, this chunk of code can be executed.
After a function has been defined with function~end it can be called at any time. The relationship between the function definition and the function call in “ping4.lua” is as follows.
In a function call arg[i] is passed as a real argument to the ping function. The value of arg[i] is substituted for the provisional argument dst in the function definition and the function is executed.
arg[i] and dst are completely different variables, and this is an operation in which, before the function starts to execute, the value of arg[i] is merely substituted for dst. For this reason, during execution of the function, even if the value of dst is changed, there is no change in arg[i] on the function call side.
If there is a return statement in the function definition, then processing returns to the side that called the function. At such time, the formula value continued after the return is passed to the call side as a function value. With ping4.lua, for both success and failure, ping returns a string as a return value, and at the call side this is output as print.
There are several reasons for defining a code chunk as a function. One reason is that when the same process appears many times, that will be defined as a function and called when necessary. By collecting the same process in one place, it becomes clear that the same process is occurring, and when change is necessary, the changed places may be reduced.
Another reason is to give a name to the process and clarify the meaning. In this example, the code that runs “ping” is given the name ping. Due to this, when this function is used later, it becomes possible to clearly understand that “ping” is running.
Combining processes in a suitable unit as a function is very useful when explaining code to people, and afterward when code must be maintained. Let’s use functions actively.
Loops
With ping4.lua in order to process multiple IP addresses passed by the command line, loops with for statements are used. The relevant parts are extracted as follows.
In this for statement, while increasing the value of the variable i from 1 to #arg one by one, between do ~end, that is, print(ping(arg[i])) is executed. # means a length operator that returns the size of the array and the length of the string, and #arg represents the size of the arg array, so in this for statement, in the order of the IP addresses given at the command line, the function ping is called and its return value is output.
In this way, as statements for repeated execution, other than the for statement, there are the while statement and the repeat-until statement. When writing code with the same meaning as a for statement, a while statement and a repeat-until statement, the results will be as follows:
In the while statement, the block is executed while each conditional formula is fulfilled, and in the repeat-until statement, the block is executed as long as each conditional formula is unfulfilled. As the conditional formula is checked after execution of the block for the repeat-until statement, the block will be executed without fail at least once. Thus, in the example above, it is configured so that when the whole is enclosed by an if statement and when the #arg is 0, that is, if no argument is given to the command, the repeat-until statement is not executed.
Although for statements, while statements and repeat-until sentences are sentences that can be repeated in the same way, there are situations that are suitable for use of the respective sentences, so use the appropriate repeating sentence.