I tried running man 2 write
on a Vagrant box running Ubuntu
"hashicorp/bionic64" only to be welcomed with:
No manual entry for write in section 2
See 'man 7 undocumented' for help when manual pages are not available.
Turns out I had to install them.
I found the following on SuperUser:
sudo apt install manpages-posix
Source: https://superuser.com/questions/1349001/cant-show-manual-pages-for-ls-in-vagrant
But apparently I had to run
sudo apt install manpages-dev