Howdy.....
True that isn’t a salute as you’d define as given in the military with the raised hand to the temple, but it is a ‘traditional greeting’ as used among Aggies.
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Howdy
Many incoming students at Texas A&M choose to attend the campus because they feel that the students are friendlier than those at other universities.[6] This perception is created partly by the Aggie tradition “Howdy”, the official greeting of Texas A&M University. Students are encouraged to greet everyone they pass on campus with a smile and a howdy.[5] Howdy is the preferred method for a speaker to get a large group’s attention, as the members of the group are expected to return the “Howdy” back to the speaker.[12]
http://en.wikipedia.org/wiki/Traditions_of_Texas_A%26M_University
Then there’s “Howdy, dammit” variation.