about history control

[Shwet Srivastava]

i am using export HISTCONTROL=ign oreboth command after that history command, history is not storing repeated command but when i use this command export HISTCONTROL=ign oredups then it also work as previous command.
i can't understand the difference b/w both. plz define both and what is work of both command.

[ashitpro]

There are three supported values.

ignorespace: Doesn't write lines started with spaces

ignoredups: Doesn't write duplicate commands.

ignoreboth: Combined above two options.

[Shwet Srivastava]

thanks for help