Backup

Backup

Commands to copy the home directory of the nbgrader admin and the nbgrader database.

SSH configuration

Generate a SSH key
(-N '' sets empty password)

ssh-keygen -t rsa -b 4096 -N '' -f ~/.ssh/id_EXAMPLE_CS_UPB_DE

Copy public key to server

ssh-copy-id -i ~/.ssh/id_EXAMPLE_CS_UPB_DE [email protected]

Add identity to client/agent

ssh-add -l                           # List identities
ssh-add ~/.ssh/id_EXAMPLE_CS_UPB_DE  # Add identity
ssh-add -l                           # Check if identity was added
ssh [email protected]          # Test

Troubleshooting: Fix permissions warning

chmod go-rwx ~/.ssh/id_EXAMPLE_CS_UPB_DE

Backup command

(-r recursively copies directories)

rsync -r -e ssh [email protected]:FILEORDIR LOCALDIR

Clone image for debugging

# Create an image using the container of interest
sudo docker commit nbgsnlp tmp

# Duplicate the mount directory
cp -R /mnt/nbgsnlp/ /tmp/tmpnbgsnlp

# Start a new container using the image and the mount directory duplicate
sudo docker run -t -d -p 8000:8000 -v /tmp/tmpnbgsnlp:/home/nbgadmin --name tmp tmp:latest

Backup container

Info: https://tuhrig.de/difference-between-save-and-export-in-docker/

# persist container
sudo docker export snlp1920 > snlp1920dockerexport.tar

# copy file

# test on local system
$ sudo docker import snlp1920dockerexport.tar 
sha256:7df4821412e00440f570106e75e0d144a574f612f8e4b1854a9ad737e49f11f4
$ sudo docker run  -i -t 7df4821412e0 /bin/bash