Log into SSH by Putty, Xshell or another Terminal and do the following:

1.) rm -rf /tmp

2.) mkdir /tmp

3.) mount -t tmpfs -o rw,noexec,nosuid tmpfs /tmp

4.) chmod 1777 /tmp

5.) echo "tmpfs   /tmp    tmpfs   rw,noexec,nosuid        0       0" >> /etc/fstab

6.) rm -rf /var/tmp

7.) ln -s /tmp /var/tmp