How to check if Docker is installed in a Unix shell script?

2018-06-20 06:49:49

This question already has an answer here:

Check if a program exists from a Bash script 29 answers

使用rickdenhaan评论中的答案的建议：

if [ -x "$(command -v docker)" ]; then
    echo "Update docker"
    # command
else
    echo "Install docker"
    # command
fi

这一个为我工作：

if [[ $(which docker) && $(docker --version) ]]; then
    echo "Update docker"
    # command
  else
    echo "Install docker"
    # command
fi

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