I recently reinstalled postgis on my pc, following
these instructions [link][1].  
The installation is successful, and for several days work using PostgreSQL and PostGIS without problems.
Now, I need to insert some shapefile within my database, but trying to execute the command "shp2pgsql" I get this result:  

    abominio@abominio-X555LD:~$ shp2pgsql --help
    Il programma "shp2pgsql" non è attualmente installato.
    È possibile   installarlo digitando: sudo apt-get install postgis

I tried to do a search  

    sudo find / -name shp2pgsql

but I do not get results.  
currently I'm using Postgres 9.3 and PostGIS 2.1.6.
why I do not have this function? how can I fix?

  [1]: http://technobytz.com/install-postgis-postgresql-9-3-ubuntu.html