What does $- mean in Bash?

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$- prints The current set of options in your current shell.

himBH means following options are enabled:

  • H – histexpand: when history expansion is enabled
  • m – monitor: when job control is enabled
  • h – hashall: Locate and remember (hash) commands as they are looked up for execution
  • B – braceexpand: when brace expansion is enabled
  • i – interactive: when current shell is interactive

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