svn tips

gistfile1.txt

# Go to the directory
cd trunk/

# Add just the single file to the current directories ignore list (like above)
# Note the dot at the end of the command is important
svn propset svn:ignore secret.txt .

# See that things worked
svn propget svn:ignore .    # Notice the single file was added to the list
svn status --no-ignore      # You should see an 'I' next to the ignored files

# Commit
svn commit -m "Its secret"  # You must commit the new property change