try the ps command to sort out using memory. Based on this we can find which oracle process is consuming more memory and what tasks are going on using these processes
It depends upon the configuration given in file /etc/default/useradd (in linux).
You need to change the "HOME" value in this file to get the default home directory of the user when using useradd...
Please check if your ftp service is enabled in inetd. Pre-solaris10 the /etc/inetd.conf file was used for the enabling/disabling of services like rsh, rlogin, ftp, telnet etc..