Riccardo Paolo Bestetti <riccardo.kyogre@live.it> writes: > In Debian 9, the > $ man pthread_mutex_init > command results in: > No manual entry for pthread_mutex_init. > > Other pthread man pages (such as pthread_create, pthread_join, ...) are available. > > The "manpages-posix-dev" non-free package is available to install the missing man pages. > Why are these pages separate from the others, and why are them not free? Install package glibc-doc. urs