How can I quickly find previous commands I wrote in gnome-terminal?
To quickly find previous commands you wrote in gnome-terminal, you can use the up and down arrow keys. The up arrow key will cycle through previously entered commands in reverse chronological order, while the down arrow key will cycle through them in the opposite direction.

You can also use the history command to see a list of previously entered commands. To quickly find a specific command, you can use the CTRL + R key combination and start typing the command you're looking for. This will initiate a reverse search through the history and display the most recent command that matches what you've typed so far.

Additionally, you can use the grep command to search for specific commands in the history. For example, to find all commands that contain the word "example", you can run the following command:

```bash
history | grep example
```

These are just a few ways to find previous commands in gnome-terminal. Experiment with these methods to find the one that works best for you.