Shuf

Pick ten random lines from a file
shuf -n 10 kjv.txt

Print 30 random numbers in the range of 1-1000
shuf --head-count=30 --input-range=1-100

Random band name generator
shuf band1.txt > band1a.txt; shuf band2.txt > band2a.txt; paste band1a.txt band2a.txt | sed 's/\t/ /g' | head -n25