The other day I upgraded the memory in a customer’s Linux system from 2 to 8 Gb. Afterwards though, only 4 Gb was “visible”. The “free” and “top” commands confirmed that only half the expected memory was there. The system was running 32 bit Red Hat 4.7 in a vmware virtual machine. Continue reading
Copying data is something every administrator does. A single file or directory file can be copied with a single command. Moving information from one system to another needs a bit more work, but it needn’t be a pain.
The ssh command can be used to copy data from one Unix system to another. Here is an example for HP-UX, but it works on Linux too. A directory, called /var/opt/ignite, is copied from the system “pluto” to another machine called “jupiter”. Continue reading