我已经在我的 Ubuntu 8.04 上安装了 Hping3，但是安装后当我想使用 Hping3 时出现此错误：
Command 'hping3' is available in '/usr/sbin/hping3'
The command could not be located because '/usr/sbin' is not included in
the PATH environment variable.
This is most likely caused by the lack of administrative privileges
associated with your user account.
当我尝试运行时，ifconfig我也得到了这个：
Command 'ifconfig' is available in '/sbin/ifconfig'
The command could not be located because '/sbin' is not included in
the PATH environment variable.
This is most likely caused by the lack of administrative privileges
associated with your user account.
首先我需要运行sudo su然后运行命令。这是正常的吗？还是我错过了什么？
当我跑步时，echo $PATH我得到：
/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/home/amirreza/simulator/ns-allinone-2.33/bin:/home/amirreza/simulator/ns-allinone-2.33/tcl8.4.18/unix:/home/amirreza/simulator/ns-allinone-2.33/tk8.4.18/unix:/home/amirreza/simulator/ns-allinone-2.33/ns-2.33/:/home/amirreza/simulator/ns-allinone-2.33/nam-1.14/
