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:

Since “ftool” can refer to different utilities, this guide covers the most common ones. Some lightweight Linux distributions or embedded systems include ftool (or a similarly named binary) for file operations like truncation, seeking, or low-level writes.

export HEADAS=/path/to/headas source $HEADAS/headas-init.sh Some Windows utilities name their executable ftool.exe for FTP/SFTP automation.

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

# Conda (simplest) conda install -c conda-forge ftools sudo apt-get install ftools-package

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

👉 https://heasarc.gsfc.nasa.gov/ftools/ Download & Install FTOOLS: Option A – Precompiled binaries (Linux/macOS):