How to see free space on unix system.

[oracle@itc-799 ~]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 100G 72G 24G 76% / /dev/sda2 ...

Renaming or moving datafile without database Shutdown.

As we know, we can rename or move datafile by shut down the database. What if we want to do it without shut down the database . This is u...