Are there similar commands?

Yes, there are several commands similar to whoami that provide information about the current user or system. Here are a few:

id: Displays user ID (UID) and group ID (GID) along with group memberships.
```
id
```
who: Shows who is currently logged into the system.
```
who
```
who am i: Similar to whoami, it shows the username of the current user along with the terminal they are using.
```
who am i
```
echo $USER: Prints the value of the USER environment variable, which typically contains the current username.
```
echo $USER
```

These commands can be useful for managing user sessions and understanding user permissions. If you need more information about any specific command, let me know!