note about command line for backing up and encryption at the same time

backup_and_encrypt.sh

# see https://askubuntu.com/questions/95920
# and this https://willhaley.com/blog/encrypt-single-file-linux-aes-gpg/
# and that https://github.com/SixArm/gpg-encrypt/blob/master/gpg-encrypt

tar -cz your_dir | gpg \
    --no-symkey-cache \
    --cipher-algo AES256 \
    --digest-algo sha256 \
    --cert-digest-algo sha256 \
    --compress-algo none -z 0 \
    --s2k-mode 3 \
    --s2k-digest-algo sha512 \
    --s2k-count 65011712 \
    --force-mdc \
    --quiet --no-greeting \
    --pinentry-mode=loopback \
    -o your_archive.tar.gz.gpg \
    -c
    
gpg -d your_archive.tar.gz.gpg | tar xz

# save config to gpg conf
echo "cipher-algo AES256" >> ~/.gnupg/gpg.conf