Techtip: One-liner to get free space

Say you’d like to copy an exuberant amount of data from one server to another and you’re unsure if the target disk has sufficient space. Perhaps you’d simply like to know how much space you’ve got.¬† There are several way to check this, but here’s one more, and in my opinion the fastest:

Run this one-liner from any computer, and as long as you run it a user context where you have user rights on the server, you will get the amount of free space in GB.

You can also use this a basis for a script listing out renaming space on several computers or several disks on a single server, but that might be the subject for another article!

Working around number ranges limited to 32 bit integers

I head a real brain teaser when working a script earlier today. Basically I was modifying a script which lists out unused phone numbers in a range. It turns out German phone numbers (and any number greater than¬†2147483647) are incompatible with number ranges. Here’s why, and how to solve it.

When using number ranges, you are limited to signed 32 bit integers (-2147483646 to +2147483647). This is rarely an issue, but when working with untypical numbers, like unformatted phone numbers or the byte value of very large files, it can pose a problem.

This is an example of a range that will work:

This however, won’t work:

The high number is above the max value for a signed 32 bit integer.

Solving required a bit of a hack. To work around this limitation, use a While loop to create an array with the number series you’d like to feed into to your variable. Below is an example:

$Counter is initially set to be the starting number of your range. It will be the control parameter that the While loop uses to check if it’s done working.
$NumberStart is the starting (low) number in you range.
$NumberEnd is the end (high) number in you range
$Array is your range (or it’s equivalent). It gets fed each value from $NumberStart to $NumberEnd. This array will hold 64 bit integers.