can I run 'su' in the middle of a bash script?

Question

can I change/su user in the middle of a script?

if [ \"$user\" == \"\" ]; then
  echo \"Enter the table name\";
  read user
fi

gunzip *
chown postgres *
su pos         


        

Answer 1

You can, but bash won't run the subsequent commands as postgres. Instead, do:

su postgres -c 'dropdb $user'

The -c flag runs a command as the user (see man su).