[root@]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 3.8G 24M 3.8G 1% /dev/shm
tmpfs 3.8G 377M 3.4G 10% /run
/dev/sda2 291G 141G 136G 51% /
/dev/sda3 2.9G 2.3G 455M 84% /tmp
/dev/sda1 976M 240M 670M 27% /boot
tmpfs 763M 0 763M 0% /run/user/0
[root@]# du -sh /tmp
2.3G /tmp
How could I do it, please?