Linux sudo自動補全

編輯文件 /etc/bash.bashrc

# enable bash completion in interactive shells 
#if [ -f /etc/bash_completion ] && ! shopt -oq posix; then 
# . /etc/bash_completion 
#fi

去掉註釋

# enable bash completion in interactive shells 
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then 
 . /etc/bash_completion 
fi