bash自动补全：

xxxxx-MacBook-Air:~ xxxxxx$ cat .bashrc[ -r "~/.bash_profile" ] && . "~/.bash_profile"# 配置 ll 等命令alias l='ls -alFG'alias la='ls -AFG'alias ll='ls -lAhFG'# 配置默认 python 环境#source ~/.py27/bin/activate# ssh scp  自动补全_complete_ssh_hosts (){        COMPREPLY=()        cur="${COMP_WORDS[COMP_CWORD]}"        comp_ssh_hosts=`awk '{split($1,aliases,","); \                        if (aliases[1] !~ /^\[/) print aliases[1]}' \                         ~/.ssh/known_hosts ;                cat ~/.ssh/config | \                        grep "^Host " | \                        awk '{print $2}'                `        COMPREPLY=( $(compgen -W "${comp_ssh_hosts}" -- $cur))        return 0}complete -F _complete_ssh_hosts sshcomplete -F _complete_ssh_hosts scp# 配置历史记录 sizeHISTSIZE=1000HISTFILESIZE=2000