I did

```
cat `which matlab` | grep matlab
```

with output

```
exec /usr/local/bin/matlab64 -r maxNumCompThreads=4 $*
echo " qsub -I -V -l nodes=1,matlab=1"
exec /usr/local/bin/matlab64 $*
exec /usr/local/bin/matlab32 $*
```

Then

```
$ ls -ld /usr/local/bin/matlab64
lrwxrwxrwx 1 root root 30 May 4 12:08 /usr/local/bin/matlab64 -> /usr/local/matlab64/bin/matlab
$ ls -ld /usr/local/bin/matlab32
lrwxrwxrwx 1 root root 28 May 4 12:08 /usr/local/bin/matlab32 -> /usr/local/matlab/bin/matlab
$ ls -ld /usr/local/matlab64
lrwxrwxrwx 1 root root 27 May 4 12:01 /usr/local/matlab64 -> /usr/local/matlab_2010a-64/
$ ls -ld /usr/local/matlab
lrwxrwxrwx 1 root root 23 May 4 12:01 /usr/local/matlab -> /usr/local/matlab_2010a
```

**EDIT**:
The better way is to do it from matlab command line with matlabroot.

```
>> matlabroot
ans =
/usr/local/matlab_2010a-64
```