Recover deleted notebook on AWS Sagemaker

Question

I accidentally deleted a jupyter notebook file on my AWS Sagemaker instance. I wonder if there's anyway to restore/recover the file?

Answer 1

Well, first check {notebook_directory}/.ipynb_checkpoints/ for a snapshot.. the directory should contain copies of your notebooks from the point in time when they were last saved.

If that's gone, the IPython kernel saves commands issued to it in a sqlite db. found in ~/.ipython/profile_default. There you should find history.sqlite.

history.sqlite should contain all commands issued to the ipython kernel. Tables of interest are sessions and history.

You need to query the sessions table by session start or end time to determine which sessions are related to the ones you're looking for:

select 
    sessions.session, sessions.start, sessions.end, history.source
from sessions 
join history using (session)
where
    start > 'your_start_date' and start < 'your_end_date';

once you find your session:

select '# @@ Cell '|| line || char(10) || source || char(10) from history where session = your_session_number;

Output your query to .py then use jupytext to convert to ipynb, then you have your notebook back:

sqlite3 history.sqlite \
    "select '# @@ Cell '|| line || char(10) || source || char(10)    from history where session = your_session_number;" \
> output.py

Answer 2

One option that you could try if you accidentally deleted the file from the Jupyter lab side tab, is to:

1. open a system terminal
2. navigate to cd ~/.local/share/Trash/files/
3. run ls to list the deleted files and check if the file is in there.
4. Then just simply move it back to your sagemakers home directory (or wherever you want) --> mv deleted-file.ipynb /home/sagemaker-user/

Answer 3

I was able to recover the history with by executing below command in a notebook cell.

%history -g