Post History

When a command takes filenames as argument, how can I avoid creating temporary files?

Suppose I have a command that takes filenames as arguments, like: `diff foo.txt bar.txt`

What if instead of actual files, I want to use the results of a command in each?

I can use temporary files:
```
ls /home/alice > /tmp/alice.txt
ls /home/bob > /tmp/bob.txt
diff alice.txt bob.txt
```

But what if I don't want to create the files?