irb(main):003:0> a = "Linux-Magazin"
=> "Linux-Magazin"
irb(main):004:0> "Jeder liest das #{a}."
=> "Jeder liest das Linux-Magazin."
irb(main):005:0> "#{a[0,5]} ist cool."
=> "Linux ist cool."
irb(main):006:0> a[0,5]
=> "Linux"
irb(main):007:0> a[0..4]
=> "Linux"
irb(main):008:0> a[0...5]
=> "Linux"
irb(main):009:0> a[6..-1]
=> "Magazin"
irb(main):010:0> a[-7..-1]
=> "Magazin"