sudo  apt  install  apt-file
sudo  apt-file updatesudo  apt-file search xmllint
sudo  apt  install  libxml2-utils
make  install 
make  -C  src install 
make[ 2 ] : Entering directory '/home/postgres/postgresql-17.2/doc/src' 
make  -C  sgml install 
make[ 3 ] : Entering directory '/home/postgres/postgresql-17.2/doc/src/sgml' 
/bin/sh .. /.. /.. /config/missing xmllint --path  .  --path  .  --output  postgres-full.xml --noent  --valid  postgres.sgml
***
ERROR: `xmllint' is missing on your system.
***
make[3]: *** [Makefile:72: postgres-full.xml] Error 1
make[3]: Leaving directory ' /home/postgres/postgresql-17.2/doc/src/sgml'
make[2]: *** [Makefile:8: install] Error 2
make[2]: Leaving directory ' /home/postgres/postgresql-17.2/doc/src'
make[1]: *** [Makefile:16: install] Error 2
make[1]: Leaving directory ' /home/postgres/postgresql-17.2/doc'
make: *** [ GNUmakefile:32: install-world-doc-recurse]  Error 2