Completion support, or autocomplete, is provided by your shell of choice. In the case of the demo, the demo was done with [Fish Shell](https://fishshell.com/), which provides completions by default. If you use Z Shell (zsh), I'd suggest taking a look at [zsh-autosuggestions](https://github.com/zsh-users/zsh-autosuggestions).
If you get an error like "_version 'GLIBC_2.18' not found (required by starship)_" when using the prebuilt binary (for example, on CentOS 6 or 7), you can use a binary compiled with `musl` instead of `glibc`:
Starship executes different commands to get information to display in the prompt, for example the version of a program or the current git status. To make sure starship doesn't hang while trying to execute these commands we set a time limit, if a command takes longer than this limit starship will stop the execution of the command and output the above warning, this is expected behaviour. This time limit is configurable using the [`command_timeout`key](/config/#prompt) so if you want you can increase the time limit. You can also follow the debugging steps below to see which command is being slow and see if you can optimise it. Finally you can set the `STARSHIP_LOG` env var to `error` to hide these warnings.
## Starship is doing something unexpected, how can I debug it?
You can enable the debug logs by using the `STARSHIP_LOG` env var. These logs can be very verbose so it is often useful to use the `module` command if you are trying to debug a particular module, for example, if you are trying to debug the `rust` module you could run the following command to get the trace logs and output from the module.
- Your locale is set to a UTF-8 value, like `de_DE.UTF-8` or `ja_JP.UTF-8`. If `LC_ALL` is not a UTF-8 value, [you will need to change it](https://www.tecmint.com/set-system-locales-in-linux/).
If either symbol fails to display correctly, your system is still misconfigured. Unfortunately, getting font configuration correct is sometimes difficult. Users on the Discord may be able to help. If both symbols display correctly, but you still don't see them in starship, [file a bug report!](https://github.com/starship/starship/issues/new/choose)