查看当前bash版本

/bin/bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin20)
Copyright (C) 2007 Free Software Foundation, Inc.

• bash3.2版本无法进行命令补全，具体查看官网描述macos配置bash补全功能

升级bash

• 命令：brew install bash
• 查看当前系统bash

which -a bash
/usr/local/bin/bash		# 新安装bash
/bin/bash		# 旧bash

• 查看新bash版本

/usr/local/bin/bash --version
GNU bash，版本 5.1.16(1)-release (x86_64-apple-darwin20.6.0)
Copyright (C) 2020 Free Software Foundation, Inc.

设置默认bash

• 执行sudo vim /etc/shells将新的/usr/local/bin/bash加到最后一行

# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.

/bin/bash
/bin/csh
/bin/dash
/bin/ksh
/bin/sh
/bin/tcsh
/bin/zsh
/usr/local/bin/bash

• 将bash切到最新版本

chsh -s /usr/local/bin/bash
Changing shell for zsx.
Password for zsx:

安装 bash-completion

• 执行命令：brew install bash-completion@2
• 将命令输出显示内容添加到~/.bash_profile中

export BASH_COMPLETION_COMPAT_DIR="/usr/local/etc/bash_completion.d"
[[ -r "/usr/local/etc/profile.d/bash_completion.sh" ]] && . "/usr/local/etc/profile.d/bash_completion.sh"

• 导入source kuberctl的补全脚本

echo 'source <(kubectl completion bash)' >>~/.bash_profile

验证补全功能

• 重启shell
• 重试kuberctl补全功能