Error: Can't open Display

although you do an xhost + still you cannot do an xclock so:

on the machine connecting to the other do a
vi /etc/X11/gdm/gdm.com

DisallowTCP=false


** REMEMBER to check iptables

XTERM execute parameter

XTERM -e (exexute switch) MUST be the last one passed to XTERM.

Oracle Move from one computer/directory to another

1. Edit and replace paths in

/etc/oratab
/etc/rc.d/rc5.d/S99zzoracle_orasid
/etc/rc.d/init.d/orastop_orasid
/etc/rc.d/init.d/listener_orasid
/etc/rc.d/init.d/orastart_orasid
/etc/rc.d/rc6.d/K10zzoracle_orasid
/etc/rc.d/rc0.d/K10zzoracle_orasid
/etc/rc.d/rc3.d/S99zzoracle_orasid
/etc/rc.d/rc1.d/K10zzoracle_orasid
/etc/oraInst.loc

2. Edit and replace paths in
listener.ora tnsnames.ora

3. login as sys as sysdba (listener must be on and database mounted)
create pfile='/apps/oracle/OraHome1/dbs/initorasid.ora' from spfile='/apps/oracle/OraHome1/dbs/spfileorasid.ora'

4. Edit /apps/oracle/OraHome1/dbs/initorasid.ora and change paths

5. Now do the reverse
create spfile='/apps/oracle/OraHome1/dbs/spfileorasid.ora' from pfile='/apps/oracle/OraHome1/dbs/initorasid.ora'

6. The last step is to alter internal files names:
alter database rename file '/home/gf_admin/oradata/gftt/control01.ctl' to '/apps/gf_admin/oradata/gftt/control01.ctl';
alter database rename file '/home/gf_admin/oradata/gftt/control02.ctl' to '/apps/gf_admin/oradata/gftt/control02.ctl';
alter database rename file '/home/gf_admin/oradata/gftt/control03.ctl' to '/apps/gf_admin/oradata/gftt/control03.ctl';
alter database rename file '/home/gf_admin/oradata/gftt/redo01.log' to '/apps/gf_admin/oradata/gftt/redo01.log';
alter database rename file '/home/gf_admin/oradata/gftt/redo02.log' to '/apps/gf_admin/oradata/gftt/redo02.log';
alter database rename file '/home/gf_admin/oradata/gftt/redo03.log' to '/apps/gf_admin/oradata/gftt/redo03.log';
alter database rename file '/home/gf_admin/oradata/gftt/system.dbf' to '/apps/gf_admin/oradata/gftt/system.dbf';
alter database rename file '/home/gf_admin/oradata/gftt/temp.dbf' to '/apps/gf_admin/oradata/gftt/temp.dbf';
alter database rename file '/home/gf_admin/oradata/gftt/tsdata.dbf' to '/apps/gf_admin/oradata/gftt/tsdata.dbf';
alter database rename file '/home/gf_admin/oradata/gftt/tsindex.dbf' to '/apps/gf_admin/oradata/gftt/tsindex.dbf';
alter database rename file '/home/gf_admin/oradata/gftt/undotbs.dbf' to '/apps/gf_admin/oradata/gftt/undotbs.dbf';

oracle spfile and pfile

startup using spfile
STARTUP

startup using pfile
STARTUP PFILE=’C:\oracle\product\10.2.0\admin\MarlonDB\initMarlonDB01.ora’

convert one to another:
CREATE SPFILE=’C:\oracle\product\10.2.0\db_1\database\spfileMarlonDB01.ora’ FROM PFILE=’C:\oracle\product\10.2.0\admin\MarlonDB\initMarlonDB01.ora’;

CREATE PFILE=’C:\oracle\product\10.2.0\admin\MarlonDB\initMarlonDB01.ora’ FROM SPFILE=’C:\oracle\product\10.2.0\db_1\database\spfileMarlonDB01.ora’;

linux increase swap

mkdir /opt
dd if=/dev/zero of=swapfile01 bs=1024M count=1
mkswap swapfile01
swapon swapfile01

vi /etc/fstab

/opt/swapfile01 swap swap defaults 0 0

oracle 9i export

if exporting from an oracle 9 instance ended in error you have to run $ORACLE_HOME/rdbms/admin/catexp.sql first.

connect to network resources on another domain

To connect to network resources in form of \\server\share on a computer which is a member of a domain other than the one you are and when you get "There are currently no logon servers available to service your request" error, do the following

1. You should know the exact share name on the server that you are connecting to.
2. explorer->Tools->Map network drive
3. specify the share name
4. user other username and password
5. Specify DOMAIN_NAME\username as username

whenever you come accros this.....

symbol errno, version GLIBC_2.0 not defined in file libc.so.6 with link time reference

you have to set LD_ASSUME_KERNEL=2.4.1 in the environment of whatever user trying to run Oracle tools like dbca