Sandbox:How to write a HOWTO

This material is proposed for deletion ... dl.cgi no longer on alpinelinux.org; *.xdelta files no longer present either AFAIK (Discuss) Make sure no other pages link here and check the page's history before deleting.

This material is proposed for merging ... It should be merged with How to use xdelta and download only differential update files. This seems to be draft notes that belong to that page. (Discuss)

For those having a slow connection, it is possible to download a smaller differential file that contains only the new Alpine version changes. You can then use the downloaded xdelta file to update your previous Alpine release iso file to the new one. You will still need to download the new iso checksum file and test the integrity of the newly built iso file. For xdelta to work you should have the three files on the same directory level, i.e.: alpine-1.10.3-1.10.4.xdelta, alpine-1.10.3-x86.iso and the alpine-1.10.4-x86.iso.sha1

wget –c http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.3-1.10.4.xdelta
wget http://dev.alpinelinux.org/alpine/v1.9/iso/alpine-1.10.4-x86.iso.sha1

Make sure you have xdelta3 installed and build the new iso

apk add xdelta3
xdelta3 -d alpine-1.10.3-1.10.4.xdelta

If checking the integrity of the file shows: alpine-1.10.4-x86.iso: OK then you are ready to continue.

How_to_use_xdelta_and_download_only_differential_update_files