split:
tar -czf – ~/work | split –bytes=100MB – ~/workspaces.tar.gz
https://learner.coursera.help/hc/en-us/articles/360004990332-Download-Jupyter-Workspace-files
merge
cat *.tar.gz* | tar xvfz –
https://stackoverflow.com/questions/38199571/untar-multiple-tar-gz-aa-tar-gz-ab-pattern-files