将/etc/.bashrc 复制到 ～/ 下即可。有可能发现命令补全功能无法使用，修改 ～/.bashrc 。将最末三行的注释#删掉即可。如下：
# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
. /etc/bash_completion
fi
.bashrc下还有好多关于bash shell 的设置。
Ubuntu不同目录下profile与bashrc的区别：http://www.linuxdiyf.com/linux/10977.html
Ubuntu主目录下.bashrc文件备份：http://www.linuxdiyf.com/linux/5532.html
备份：GAMIT安装后的.bashrc文件及Ubuntu分区：http://www.linuxdiyf.com/linux/2935.html