hello,<br>what happened when I type roscd,<br>it showed commnad not found?<br>I type ros and tab it show below,<br>and I find that roscd is missing...<br>How I fixed that?<br><br>sam@sam-desktop:~$ ros<br>rosbag           rosgraph         rosnode          rossrv<br>
rosboost-cfg     roslaunch        rospack          rosstack<br>rosclean         roslaunch-deps   rosparam         rostest<br>rosconfig        roslaunch-logs   rosplay          rostopic<br>roscore          roslocate        rosrebag         rosversion<br>
roscreate-pkg    rosmake          rosrecord        roswtf<br>roscreate-stack  rosmaster        rosrun           <br>rosdep           rosmsg           rosservice       <br>sam@sam-desktop:~$ roscd<br>roscd: command not found<br>
sam@sam-desktop:~$ <br><br>