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# run powershell(administrator), close protection software
Get-ExecutionPolicy
Set-ExecutionPolicy AllSigned
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))

choco install lxrunoffline

wget https://github.com/CentOS/sig-cloud-instance-images/raw/CentOS-7/docker/centos-7-docker.tar.xz
LxRunOffline install -n centos -d E:/centos -f D:\centos-8-x86_64.tar.xz
LxRunOffline.exe list

LxRunOffline.exe uninstall -n centos

wsl -l -v
wsl --set-version centos 2
# start
wsl -d centos
uname -a
cat /proc/version
cat /etc/redhat-release
# stop
wsl --shutdown -n

sed -i 's/before/after/' file

sed -i -e '' -e '' file

sed -i 's/'$value'/after/' file 

sed -i 's/abc\(def\)/ghi/' file # ghidef
sed -i 's/abc\(def\)/\1/' file # defdef
sed -i 's/abc.*/[&]/' file # [abc.*] 

sed -i '1,$d' file # remove 1-end line
sed -i 's/abc//' file # delete all abc