根据github.com/docker/compose/releases中安装compose的说明，在ubuntu上执行以下安装命令：
curl -L https://github.com/docker/compose/releases/download/v2.17.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
命令执行返回的结果是：-bash: /usr/local/bin/docker-compose: Permission denied，这说明是执行上述命令的权限不够，然后使用sudo重新执行：
sudo curl -L https://github.com/docker/compose/releases/download/v2.17.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compos
但是命令执行的结果仍然是Permission denied。从网上查找资料，有人也遇到过该问题，经验是切换到超级用户下执行安装命令。
首先执行sudo -i，提示输入用户密码，输入密码后进入超级用户（root）模式，重新执行上述命令，一切正常。
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