TestDisk package for Debian Stretch is from 2015. It is so old that I have to build it from the source code. Here is how I did it.

Install dependencies

Since I don't need a GUI, I exclude the Qt packages: qtbase5-dev qttools5-dev-tools.

apt-get -y install build-essential e2fslibs-dev libewf-dev libncurses5-dev 
apt-get -y install libncursesw5-dev ntfs-3g-dev libjpeg-dev uuid-dev 
apt-get -y install zlib1g-dev pkg-config dh-autoreconf git 
apt-get -y install debhelper dwz

Build TestDisk

# Get the source code from repository.
    git clone https://git.cgsecurity.org/testdisk.git
 
# Compile.
    cd testdisk
    mkdir config
    autoreconf --install -W all -I config
    ./configure
    make    
 
# Install.
    make install

Note: As of 2020-03-09, make static doesn't work.

Check version

Check that the latest version is indeed installed.

/usr/local/bin/testdisk --version
    # TestDisk 7.2-WIP, Data Recovery Utility, January 2020

Details of utilities

testdisk: When a file is deleted, the list of disk clusters occupied by the file is erased, marking those sectors available for use by other files created or modified thereafter. If the file wasn’t fragmented and the clusters haven’t been reused, TestDisk can recover the deleted file for various filesystem:

• FAT
• NTFS
• exFAT
• ext2

photorec: PhotoRec is a file carver data recovery software tool. It doesn’t recover the original filenames but it can recover delete files even from corrupted filesystem. PhotoRec recognizes and recovers numerous file formats including ZIP, Office, PDF, HTML, JPEG and various graphics file formats. The whole list of file formats recovered by PhotoRec contains more than 480 file extensions (about 300 file families). It’s possible to create custom signature to recover file format unknown to PhotoRec.