Ubuntu enable bash completion

vim /etc/bash.bashrc

把
# enable bash completion in interactive shells
#if [ -f /etc/bash_completion ]; then
# . /etc/bash_completion
#fi

改成
# enable bash completion in interactive shells
if [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi

如果要考虑移植到别的发行版里面可能有些麻烦，我在RHEL5上面测试了不成功，错误提示找不到
./etc/bash_completion
哪位仁兄做到了给说阿，以后能省事不少。