By default, when running a script, the output is shown to you in the command line interface. Most of the time, that is exactly what you want. Some times, though, you are more interested in logging than in real-time data. The solution is to have the output sent to a file.
As an example, imagine the following: You want to see where the traffic to a server ends, so you run a traceroute to find out. Normally, the command would like like this:
Here’s what you would use to route the output to a text file:
tracert server.dom > textfile.txt.
Now, that’s all well and good, until you want to add more logs to the same file. The problem is that a single > will replace the contents of the file in question with the new information. To append, rather than replace, use a double >, like so:
tracert server.dom >> textfile.txt.