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For WSL2: Fixes "Connection Refused" issue when accessing Windows localhost services. Run with "sudo sh wsl2-ubuntu-map-win-localhost.sh" !!! Remember to backup "/etc/hosts" just in case !!!
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| nameserver=$(grep -m 1 nameserver /etc/resolv.conf | awk '{print $2}') # find nameserver | |
| [ -n "$nameserver" ] || "unable to find nameserver" || exit 1 # exit immediately if nameserver was not found | |
| echo "##### nameserver found: '$nameserver'" | |
| localhost_entry=$(grep -v "127.0.0.1" /etc/hosts | grep "\slocalhost$") # find localhost entry excluding 127.0.0.1 | |
| if [ -n "$localhost_entry" ]; then # if localhost entry was found | |
| echo "##### localhost entry found: '$localhost_entry'" | |
| sed -i "s/$localhost_entry/$nameserver localhost/g" /etc/hosts # then update localhost entry with the new $nameserver | |
| else # else if entry was not found | |
| echo "##### localhost entry not found" | |
| echo "$nameserver localhost" >> /etc/hosts # then append $nameserver mapping to localhost | |
| fi | |
| cat /etc/hosts # display to confirm |
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thank you, saved an hour researching on how to map wsl2 to windows localhost