I had small disk space on my PC. Therefore, I added a new SATA hard drive to allocate more disk space to Matlab. The new hard drive is mounted on a dircetory called /hdd2TB/. I also changed the value of environment variable 'TMP' both in the /etc/environment file and using setenv() function. Now tempdir command returns:
or in terminal:
Yet, /tmp/ directory grows in size when I run my simulations and /hdd2TB/ does not change.