為什么alias命令比.bashrc里面定義對別名多?多的這幾個是哪里定義的，可以查看嗎？#?cat /root/.bashrc # .bashrc# User specific aliases and functionsalias rm='rm -i'alias cp='cp -i'alias mv='mv -i'# Source global definitionsif [ -f /etc/bashrc ]; then?? ?. /etc/bashrcfi#aliasalias cp='cp -i'alias l.='ls -d .* --color=auto'alias ll='ls -l --color=auto'alias ls='ls --color=auto'alias mv='mv -i'alias rm='rm -i'alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'#