All systems administrators are well familiar with the concatenation tool 'cat', and some also know of the variants such as 'tac', 'supercat' and even the improved cat - 'dog'. A few more or less useful listing of concatenation tools:
cat - the basic concatenation tool.
supercat - Introduces coloring and can be used for syntax highlighting.
tac - reverse cat.
dog - improved cat. Can fetch the newspaper (http streams)
hungrycat - Removes bytes as it concatenates leaving the file empty once co...