adding more space to root partition

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda1 521748 269392 225852 55% /
none 1037244 0 1037244 0% /dev/shm
/dev/sda7 104377596 1593416 102784180 2% /home
/dev/sda5 5119900 1377152 3742748 27% /usr
/dev/sda6 5119900 2301356 2818544 45% /var

I have plenty of hard space available. I need to add more space to my
root partition. How do I go about doing that?

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