奇怪的bash问题,我跟你急

奇怪的bash问题,我跟你急

在图形界面下点图标进入命令行的时候,显示
bash: :command not found
我的.bashrc文件配置如下
# .bashrc
# User specific aliases and functions
# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi
而且好像开机的时候也有问题,就是本来是有的命令,结果却显示没有找到,是不是路径的问题?
      
$ echo $PATH      
yes,i see,but i can't find any wrong.      
Then there must be some bad command in ~/.bashrc,
~/.bash_profile, ~/.profile, /etc/bashrc or
/etc/profile.