Centos/Mac 命令自动补全

常常使用tab来补全需要的命令参数，但在最小化安装系统的时候默认不安装，由于软件在epel库中，安装时先安装epel-release，再安装bash-completion，且需要重新建立bash环境。

Centos
yum -y install epel-release
yum -y install bash-completion
# or Debian
apt-get install bash-completion -y

Mac
brew install bash-completion

# 写入设置，具体的可以通过 brew info bash-completion 查看
vim ~/.zshrc
fpath=(/usr/local/share/zsh-completions $fpath)
plugins=(... zsh-completions)
autoload -U compinit && compinit

Docker

curl https://raw.githubusercontent.com/docker/docker-ce/master/components/cli/contrib/completion/bash/docker -o /etc/bash_completion.d/docker.sh

# 激活，在.bashrc中添加如下配置

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi