安装docker-compose 一直Executing docker install script, commit: 66474034547a96caa0a25be56051ff8b726a1b28 Warning: the "docker" command appears to already exist on this system.

A: 如果提示已经安装过docker命令，可以尝试卸载已有的docker，并重新安装docker-compose，以下是具体步骤：

1.卸载已有的docker

sudo apt-get remove docker docker-engine docker.io containerd runc

2.安装依赖包

sudo apt-get update

sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release

3.添加Docker官方GPG密钥

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

4.添加Docker官方APT仓库

echo \
"deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

5.安装docker-ce

sudo apt-get update

sudo apt-get install docker-ce docker-ce-cli containerd.io

6.验证docker是否安装成功

sudo docker run hello-world

如果显示"Hello from Docker!"则说明安装成功。

7.安装docker-compose

sudo curl -L "https://github.com/docker/compose/releases/download/1.26.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

8.验证docker-compose是否安装成功

docker-compose --version

如果显示版本号，则说明安装成功。