/opt/qtcreator-2.6.0/bin/qtcreator

[root@tom opt]# chmod u+x /home/shikun/Documents/qt-creator-linux-x86-opensource-2.6.0.bin 

 [root@tom opt]# /home/shikun/Documents/qt-creator-linux-x86-opensource-2.6.0.bin 

 [root@tom opt]# ls 

 exer_mine  FriendlyARM  mini6410  Qt4.7  qt4.7.tgz  qtcreator-2.6.0 

 [root@tom opt]# cd qtcreator-2.6.0 

 [root@tom qtcreator-2.6.0]# cd bin 

 [root@tom bin]# ls 

 accessible  iconengines   platforms  Qt         qtcreator_process_stub  qtpromaker  sdktool 

 designer    imageformats  qmlpuppet  qtcreator  qtcreator.sh            QtWebKit    sqldrivers 

 [root@tom bin]# pwd 

 /opt/qtcreator-2.6.0/bin 

 [root@tom bin]# cd /opt 

 [root@tom opt]# opt/qtcreator-2.6.0/bin/qtcreator 

 -bash: opt/qtcreator-2.6.0/bin/qtcreator: No such file or directory 

 [root@tom opt]# /opt/qtcreator-2.6.0/bin/qtcreator