Install samba.

yum install samba
/etc/init.d/smb start
/etc/init.d/smb enable
/etc/init.d/nmb start
/etc/init.d/nmb enable
/etc/init.d/autofs start

Install gnome-commander. Better file manager.

yum install gnome-commander

SSH is installed but not started or set to auto start.

systemctl start sshd.service
systemctl enable sshd.service

yum install smartmontools
yum install autofs

Use udisks –enumerate or mdadm –detail –scan to identify device names (e.g. /dev/sdb) for the commands below. First create raid.

mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sdd

This step above took over a dozen hours for me. To see status.

watch cat /proc/mdstat

Save your new configuration so that it can be loaded next time you reboot.

mdadm --detail --scan >> /etc/mdadm.conf

mke2fs -t ext4 -j /dev/md0

Add this to /etc/fstab so that it is mounted every time. /data being the mount point.

/dev/md0 /data auto defaults 0 3

If you chose to use ext2/3/4 you should also be aware of reserved space. By default ext2/3/4 will reserve 5% of the drives space, which only root is able to write to. This is done so a user cannot fill the drive and prevent critical daemons writing to it, but 5% of a large RAID array which isn’t going to be written to by critical daemons anyway, is a lot of wasted space. I chose to set the reserved space to 0%, using tune2fs:

tune2fs -m 0 /dev/md0

vi /etc/auto.misc
dmesg is a nice command as well. 
ls -Z

shows the SELinux security label

This sets the label for the /data directory. Do it before you add anything to the directory. Everything added will gain this attribute. Without this, SAMBA will not work under SELinux.

chcon -t samba_share_t /data

Make sure samba and netbios are set to autostart

chkconfig --levels 35 smb on
chkconfig --levels 35 nmb on

To test mail config,

chkconfig --levels 35 sendmail on
yum install mailx 

vi /etc/smartmon.conf
Wanna run x-windows programs remotely such as gome-commander, do the following. Before establishing the ssh connection the xserver must be started and the environment variable DISPLAY must be set for ssh.

$ DISPLAY=localhost:0.0
$ export DISPLAY
$ ssh -Y remotehost

or

$ DISPLAY=localhost:0.0 ssh -Y remotehost

The parameter -Y enables trusted X11Forwarding. This is available since OpenSSH 3.8. If you have an older version of ssh you will have to use -X.

Then you can do

gome-commander &

Growing a raid 5 array
http://scotgate.org/2006/07/03/growing-a-raid5-array-mdadm/
Replace Failed drive
http://www.kernelhardware.org/replacing-failed-raid-drive/

sources
http://bfish.xaedalus.net/2006/11/software-raid-5-in-ubuntu-with-mdadm/

http://www.jamierf.co.uk/2009/11/04/software-raid-5-using-mdadm-in-ubuntu-9-10/

http://www.linuxjournal.com/magazine/monitoring-hard-disks-smart?page=0,2

http://blog.shadypixel.com/monitoring-hard-drive-health-on-linux-with-smartmontools/

http://www.oracle.com/technetwork/articles/hunter-rac10gr2-iscsi-101317.html#4

1. Create a new user on the target database with DBA role granted

connected as sys run the following commands:

CREATE USER DBA_TOOLS identified by ;

grant DBA to DBA_TOOLS;

2. Create a DBlink in the new schema to point to the source schema

CREATE DATABASE LINK “db_LINK_NAME”

connect to source_schema

identified by password

using ‘DB_alias’;

3. Create the procedure which will refresh the data

CREATE OR REPLACE PROCEDURE DBA_TOOLS.copy_schema

( source_schema in varchar2,

destination_schema in varchar2,

new_password in varchar2 default ‘newuser’,

network_link in varchar2 default ‘db_LINK_NAME’)

as

JobHandle number;

js varchar2(9); — COMPLETED or STOPPED

q varchar2(1) := chr(39);

BEGIN /* open a new schema level import job using a default DB link */

JobHandle := dbms_datapump.open (‘IMPORT’,

‘SCHEMA’,

network_link);

/* restrict to the schema we want to copy */

dbms_datapump.metadata_filter ( JobHandle,

‘SCHEMA_LIST’,

q||source_schema||q);

/* remap the importing schema name to the schema we want to create */

dbms_datapump.metadata_remap ( JobHandle,

‘REMAP_SCHEMA’,

source_schema,

destination_schema);

/* Set datapump parameters*/

dbms_datapump.set_parameter ( JobHandle,

‘TABLE_EXISTS_ACTION’,

‘REPLACE’ );

/* start the job */

dbms_datapump.start_job( JobHandle);

/* wait for the job to finish */

dbms_datapump.wait_for_job( JobHandle, js);

end;

/

4. Run the schema refresh

begin

DBA_TOOLS.copy_schema(‘SOURCE_SCHEMA’,’DESTINATION_SCHEMA’);

end;

/

More information about this subject ( Speed up the schema refresh over a DBlink with Data Pump (10g) ) you can get from www.in-oracle.com

http://plsql.wikidot.com/forum:recent-posts

http://www.oracle-developer.net/content/utilities/stk.sql

variable s := '1,2,3';

in 10g, this works in pl/sql
SELECT TO_NUMBER(xt.column_value) lock_id
FROM XMLTABLE(s) xt;

in all version, this works in pl/sql
select
    substr(txt,
    instr (txt, ',', 1, level ) + 1,
    instr (txt, ',', 1, level+1) - instr (txt, ',', 1, level) -1 )
as token
from (select ','||s||',' txt from dual)
connect by level

 
One caveat though, in less than 11.2 sometimes this causes ora-600 error after a while. Known bug not fixed until 11.2.
Tom Kyte
Another way

n=1
for i in H*.mkv; do mv “$i” “${i/.mkv/-$n.mkv}”;let “n += 1″;done
n=1
for i in HO*.mkv; do echo “$i” “${i/HOGAN_S_HEROES_S3_D?-?/Hogans Heroes S3E$n}”;let “n += 1″; done
then point filebot at it and the episode titles are added instantly.

Tomatoes, peppers, beans and peas are good choices for seed saving. These plants have flowers that are self-pollinating, and seeds that require little or no special treatment before storage.

Saving pepper seeds is even easier. Allow some fruits to stay on the plants until they become fully ripe and start to wrinkle. Remove the seeds from the peppers and spread them out to dry.

Store seeds in tightly-sealed glass containers. You can store different kinds of seeds, each in individual paper packets, together in a large container. Keep seeds dry and cool. A temperature between 32° and 41°F is ideal, so your refrigerator can be a good place to store seeds.

A small amount of silica-gel desiccant added to each container will absorb moisture from the air and help keep the seeds dry. Silica gel is sold in bulk for drying flowers at craft supply stores. Powdered milk can also be used as a desiccant. Use one to two tablespoons of milk powder from a freshly opened package. Wrap the powder in a piece of cheesecloth or a facial tissue and place it in the container with the seeds. Powdered milk will absorb excess moisture from the air for about six months.

Be sure to label your saved seeds with their name, variety, and the date you collected them. It’s too easy to forget the details by the following spring.

Saving Vegetables Seeds: Tomatoes, Peppers, Peas and Beans by Jill MacKensie, Former Extension Specialist, Horticulture,
University of Minnesota Extension

Pepper seeds can be purchased from here and here.

Answer: Three ways to do it.

1. in tnsnames.ora file put the following which can be a network location. This may or may not be supported.
ifile=c:\temp\tnsnames.ora

2. set up a TNS_ADMIN environment variable that points to the directory where this file
is.

3. The best place to put the tns_admin variable on Windows is in the registry under each oracle home.
For example: HKLM\software\oracle\home0\tns_admin and set the value to the location of your tnsnames.ora file. Supposedly, this is documented in the Administrators Guide…

All this ripped from http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2354114929479

select
   inst_id,
   blocking_session,
   sid,
   serial#,
   wait_class,
   seconds_in_wait
from
   gv$session
where
   blocking_session is not NULL
order by
   blocking_session;

http://blogbuildingu.com/articles/using-vmware-player-to-create-images-for-new-virtual-machines

Online webpage to create and download properly configured blank image files.

http://www.easyvmx.com/new-easyvmx.shtml

Oracle Linux

http://www.oracle.com/technology/tech/linux/index.html

Unbuntu with Oracle

http://www.pythian.com/news/968/installing-oracle-11g-on-ubuntu-804-lts-hardy-heron

http://www.microsoft.com/windowsserver2008/en/us/hyperv-supported-guest-os.aspx

1. Alias rownum in the subquery.
2. count(*) over () as an extra column.
3. add to the where clause to filter result to a single page.

Example.

select *
from (select empno, rownum rn, count(*) over () cnt
      from employees
      ) xx
where rn >= 11 and rn < 15

“count(*) over ()” gives you the total number of records in the resultset which in this case is the subquery. Therefore, you do not need to execute the query twice.