# Debian/Ubuntu (rare, check first) apt-cache search ftool git clone https://github.com/user/ftool.git cd ftool make sudo make install
export HEADAS=/path/to/headas source $HEADAS/headas-init.sh Some Windows utilities name their executable ftool.exe for FTP/SFTP automation. ftool download
# Conda (simplest) conda install -c conda-forge ftools sudo apt-get install ftools-package # Debian/Ubuntu (rare, check first) apt-cache search ftool
👉 https://heasarc.gsfc.nasa.gov/ftools/ Download & Install FTOOLS: Option A – Precompiled binaries (Linux/macOS): # Debian/Ubuntu (rare