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# enable bash completion in interactive shells
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# if ! shopt -oq posix; then // [!code --]
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#   if [ -f /usr/share/bash-completion/bash_completion ]; then // [!code --]
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#     . /usr/share/bash-completion/bash_completion // [!code --]
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#   elif [ -f /etc/bash_completion ]; then // [!code --]
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#     . /etc/bash_completion // [!code --]
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#   fi // [!code --]
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# fi // [!code --]
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if ! shopt -oq posix; then // [!code ++]
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  if [ -f /usr/share/bash-completion/bash_completion ]; then // [!code ++]
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    . /usr/share/bash-completion/bash_completion // [!code ++]
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  elif [ -f /etc/bash_completion ]; then // [!code ++]
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    . /etc/bash_completion // [!code ++]
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  fi // [!code ++]
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fi // [!code ++]

1
# enable programmable completion features (you don't need to enable
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# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
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# sources /etc/bash.bashrc).
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# if [ -f /etc/bash_completion ] && ! shopt -oq posix; then // [!code --]
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#     . /etc/bash_completion // [!code --]
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# fi // [!code --]
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if [ -f /etc/bash_completion ] && ! shopt -oq posix; then // [!code ++]
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    . /etc/bash_completion // [!code ++]
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fi // [!code ++]