# Gmx hbonds

**URL:** <https://gromacs.bioexcel.eu/t/gmx-hbonds/12061>\
**Category:** User discussions\
**Created:** [May 11, 2025, 7:52pm UTC](https://gromacs.bioexcel.eu/t/gmx-hbonds/12061 "2025-05-11T19:52:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![salah](https://avatars.discourse-cdn.com/v4/letter/s/977dab/32.png) [@salah](https://gromacs.bioexcel.eu/u/salah)\
**Post date:** [May 11, 2025, 7:52pm UTC](https://gromacs.bioexcel.eu/t/gmx-hbonds/12061/1 "2025-05-11T19:52:02Z")

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GROMACS version:23.3  
GROMACS modification: Yes/No  
Here post your question : How can I run `gmx hbond` to compute both `hblife.xvg` (hydrogen bond lifetime) and `hbacf.xvg` (autocorrelation function) for a system of water modeled with TIP5P?