wget https://heasarc.gsfc.nasa.gov/FTP/software/lheasoft/lheasoft.tar.gz tar -xzf lheasoft.tar.gz cd lheasoft ./configure make make install

which ftool ftool --version The most common usage: FTOOLS (FITS Tools) by NASA’s HEASARC – a suite for manipulating FITS files. The command-line driver is often called ftool or individual tools like fhelp , flist , fimg , etc.

docker pull heasarc/ftools docker run -it heasarc/ftools After installation, set environment variables:

Vendor-specific (e.g., in network management suites). Not standardized. 4. Verify your ftool If you’re unsure which ftool you need, run: