WSL2:docker使用ubuntu18.04报错：No system certificates available. Try installing ca-certificates.

1.报错：No system certificates available. Try installing ca-certificates.

2.解决：
# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.5 LTS"

//更换163源
# sudo vim /etc/apt/source.list
deb http://mirrors.163/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163/ubuntu/ bionic-backports main restricted universe multiverse

# sudo apt update