bash: ./my-install.sh: Permission denied ---solved

      1. bash 权限不够问题 

解决方法：

因为你的文件没有执行权限，所以会这样chmod a+x my-install.sh 把执行权限给他应该就可以执行了

     2.chmod:chmod - change file mode bits

          This manual page documents the GNU version of chmod.  chmod changes the       file mode bits of each given file  according  to  mode,  which  can  be       either a symbolic representation of changes to make, or an octal number       representing the bit pattern for the new mode bits.

          The full documentation for chmod is maintained as a Texinfo manual.  If       the  info  and  chmod programs are properly installed at your site, the       command  info coreutils 'chmod invocation'  should give you access to the complete manual.

     3.Permission denied(权限不够）