58 lines
2.3 KiB
Markdown
58 lines
2.3 KiB
Markdown
---
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title: "bash auto-completion on Linux"
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description: "Some optional configuration for bash auto-completion on Linux."
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headless: true
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---
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### Introduction
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The kubectl completion script for Bash can be generated with the command `kubectl completion bash`. Sourcing the completion script in your shell enables kubectl autocompletion.
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However, the completion script depends on [**bash-completion**](https://github.com/scop/bash-completion), which means that you have to install this software first (you can test if you have bash-completion already installed by running `type _init_completion`).
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### Install bash-completion
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bash-completion is provided by many package managers (see [here](https://github.com/scop/bash-completion#installation)). You can install it with `apt-get install bash-completion` or `yum install bash-completion`, etc.
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The above commands create `/usr/share/bash-completion/bash_completion`, which is the main script of bash-completion. Depending on your package manager, you have to manually source this file in your `~/.bashrc` file.
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To find out, reload your shell and run `type _init_completion`. If the command succeeds, you're already set, otherwise add the following to your `~/.bashrc` file:
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```bash
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source /usr/share/bash-completion/bash_completion
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```
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Reload your shell and verify that bash-completion is correctly installed by typing `type _init_completion`.
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### Enable kubectl autocompletion
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#### Bash
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You now need to ensure that the kubectl completion script gets sourced in all your shell sessions. There are two ways in which you can do this:
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{{< tabs name="kubectl_bash_autocompletion" >}}
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{{< tab name="User" codelang="bash" >}}
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echo 'source <(kubectl completion bash)' >>~/.bashrc
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{{< /tab >}}
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{{< tab name="System" codelang="bash" >}}
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kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
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{{< /tab >}}
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{{< /tabs >}}
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If you have an alias for kubectl, you can extend shell completion to work with that alias:
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```bash
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echo 'alias k=kubectl' >>~/.bashrc
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echo 'complete -o default -F __start_kubectl k' >>~/.bashrc
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```
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{{< note >}}
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bash-completion sources all completion scripts in `/etc/bash_completion.d`.
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{{< /note >}}
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Both approaches are equivalent. After reloading your shell, kubectl autocompletion should be working.
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To enable bash autocompletion in current session of shell, run `exec bash`:
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```bash
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exec bash
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```
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