Hi This is request to DBA man
Q. I have installed Oracle 10g Express edition in Linux
fedora Core 6.When i have run the following script for
ORACLE _HOME environment variable setting . script is ".
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/oracle_env.sh"
variable is set but it is working only in current session.
If i restart the system again i should run that script. So
haw to set permanently ? even i have try with export command
for that environment set it also does not work.
Q. When i run sqlplus in shell prompt It is working but when
i give user name and password the following error come out i.e
# sqlplus

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Apr 2
19:45:40 2010

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Enter user-name: system
Enter password:
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory

I have also proper partition of disk means swap memory are
available.
# fdisk -l

Disk /dev/sda: 40.0 GB, 40060403712 bytes
255 heads, 63 sectors/track, 4870 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 1275 10241406 7
HPFS/NTFS
/dev/sda2 1276 4870 28876837+ f W95
Ext'd (LBA)
/dev/sda5 1276 3187 15358108+ 7
HPFS/NTFS
/dev/sda6 3188 4672 11928231 83 Linux
/dev/sda7 4673 4863 1534176 82
Linux swap / Solaris