# pstree.remy > Cross platform ps-tree (including unix flavours without ps) ## Installation ```shel npm install pstree.remy ``` ## Usage ```js const psTree = psTree require('pstree.remy'); psTree(PID, (err, pids) => { if (err) { console.error(err); } console.log(pids) }); console.log(psTree.hasPS ? "This platform has the ps shell command" : "This platform does not have the ps shell command"); ```