Running out of free space on /tmp. Need someone to help me free up space and increase size of partition

I'm running out of free space on /tmp. Need someone to help me free up space and increase size of partition Server is Linux RedHat. Also looking to hire this person to be my server admin to help me monitor, patch/update, and help me solve any problems that come up. I run a small business (a few employees) and have about 3 or 4 websites that get a total of about a few thousand visitors a month. Nothing too big or challenging, but I just need someone reliable, and someone who's available during USA hours.