Oracle Directories

synonyms and views

public synonym:- create public synonym name for scott.students;

private synonym:- create synonym name for scott.students;

public view :- create or replace view name as (select * from scott.students);

tablespace datafiles sizes in KB MB GB TB PB EB ZB YB

select 
file_id,
tablespace_name,
file_name,
bytes,
case 
when bytes between 0 and 1023 then bytes || ' bytes'
when bytes < power(1024,2) then round(bytes / 1024,4) || ' KB'
when bytes < power(1024,3) then round(bytes / power(1024,2),4) || ' MB'
when bytes < power(1024,4) then round(bytes / power(1024,3),4) || ' GB'
when bytes < power(1024,5) then round(bytes / power(1024,4),4) || ' TB'
when bytes < power(1024,6) then round(bytes / power(1024,5),4) || ' PB'
when bytes < power(1024,7) then round(bytes / power(1024,6),4) || ' EB'
when bytes < power(1024,8) then round(bytes / power(1024,7),4) || ' ZB'
when bytes < power(1024,9) then round(bytes / power(1024,8),4) || ' YB'
else 'INVALID VALUE FOR BYTES'
end as bytes_sizes
from dba_data_files;

------------------------------ to get full detail of imported objects on target db ----------------------

select 

(select host_name from v$instance) "Host", 

(select instance_name from v$instance) "Instance",

owner,

segment_name,

(select 

to_char(cast(created as timestamp with local time zone), 'DD-MONTH-YYYY hh24:mi:ss TZD yyyy') "created" from dba_objects where object_name='&object_name' and owner='&schema_name') "created",

(select to_char( cast(sysdate as timestamp with local time zone), 'DD-MONTH-YYYY hh24:mi:ss TZD yyyy') from dual) "sysdate",

case 

when bytes between 0 and 1023 then bytes || 'bytes'

when bytes < power(1024,2) then round(bytes / power(1024,1),4) || 'KB'

when bytes < power(1024,3) then round(bytes / power(1024,2),4) || 'MB'

when bytes < power(1024,4) then round(bytes / power(1024,3),4) || 'GB'

when bytes < power(1024,5) then round(bytes / power(1024,4),4) || 'TB'

when bytes < power(1024,6) then round(bytes / power(1024,5),4) || 'PB'

when bytes < power(1024,7) then round(bytes / power(1024,6),4) || 'EB'

when bytes < power(1024,8) then round(bytes / power(1024,7),4) || 'ZB'

when bytes < power(1024,9) then round(bytes / power(1024,8),4) || 'YB'

else 'INVALID VALUE FOR BYTES'

end as bytes_sizes

from dba_segments

where segment_name='&table_name' and owner='schema_name';

select tablespace_name,warning_value,critical_value from dba_tablespace_thresholds where tablespace_name=upper('&tablespace_name');

important views in oracle 

dba_tablespace_thresholds

dba_thresholds

dba_triggers

dba_ts_quotas

all_apply_quotas

all_apply_error

all_certificates

all_goldengate_privileges

all_goldengate_rule

all_goldengate_inbound

all_lobs

all_method_params

all_external_locations

all_credentials

Apache httpd tomcat Server setup on linux

 How To setup apache tomcat httpd server on linux:-

1. dnf install httpd; dnf install apache*
2. systemctl enable --now httpd.service
3.sestatus --> /etc/selinux/config ---> set selinux=permissive
4. if possible :- 
systemctl stop firewalld.service
systemctl disable firewalld.service
or 
firewall-cmd --add-service=http --permanent
firewall-cmd --reload
go  to chrome/edge:-
http://pm
it will show you the html file from :-
/etc/httpd/conf/httpd.conf
/var/www/html/index.html (you need to create and add your html content)
logs:-
var/log/httpd
when you change/modify "/var/www/html/index.html" do : systemctl restart httpd

*********** my own  setup ****************

[root@pm Videos]# ls

getorareport.sh  index.html

[root@pm Videos]#

[root@pm Videos]#

[root@pm Videos]# pwd

/home/oracle/Videos

[root@pm Videos]# cat getorareport.sh

#!/bin/sh

export ORACLE_HOME=/u02/app/oracle/product/21c/dbhome_1

export ORACLE_SID=chennai

export PATH=$ORACLE_HOME/bin:$PATH

export LD_LIBRARY_PATH=$ORACLE_HOME/lib

sqlplus /nolog <<!!

conn sys/Kayyum#424304 as sysdba;

set markup HTML on;

set lines 400;

col host_name for a20;

spool index.html

select host_name,instance_name from gv\$instance;

spool off;

set markup HTML off;

exit;

!!

# export to /var/www/html/index.html

cat /home/oracle/Videos/index.html > /var/www/html/index.html

[root@pm Videos]#

[root@pm Videos]# whoami

root

[root@pm Videos]# crontab -l

* * * * * /home/oracle/Videos/getorareport.sh > /dev/null 2>&1

[root@pm html]# ls

index.html

[root@pm html]# pwd

/var/www/html

[root@pm html]# ls -lrt

total 4

-rw-r--r--. 1 root root 310 Aug 18 14:33 index.html

[root@pm html]#

*****************************************************************

[root@pm conf]# cat httpd.conf

#

# This is the main Apache HTTP server configuration file.  It contains the

# configuration directives that give the server its instructions.

# See <URL:http://httpd.apache.org/docs/2.4/> for detailed information.

# In particular, see

# <URL:http://httpd.apache.org/docs/2.4/mod/directives.html>

# for a discussion of each configuration directive.

#

# See the httpd.conf(5) man page for more information on this configuration,

# and httpd.service(8) on using and configuring the httpd service.

#

# Do NOT simply read the instructions in here without understanding

# what they do.  They're here only as hints or reminders.  If you are unsure

# consult the online docs. You have been warned.

#

# Configuration and logfile names: If the filenames you specify for many

# of the server's control files begin with "/" (or "drive:/" for Win32), the

# server will use that explicit path.  If the filenames do *not* begin

# with "/", the value of ServerRoot is prepended -- so 'log/access_log'

# with ServerRoot set to '/www' will be interpreted by the

# server as '/www/log/access_log', where as '/log/access_log' will be

# interpreted as '/log/access_log'.

#

# ServerRoot: The top of the directory tree under which the server's

# configuration, error, and log files are kept.

#

# Do not add a slash at the end of the directory path.  If you point

# ServerRoot at a non-local disk, be sure to specify a local disk on the

# Mutex directive, if file-based mutexes are used.  If you wish to share the

# same ServerRoot for multiple httpd daemons, you will need to change at

# least PidFile.

#

ServerRoot "/etc/httpd"

#

# Listen: Allows you to bind Apache to specific IP addresses and/or

# ports, instead of the default. See also the <VirtualHost>

# directive.

#

# Change this to Listen on specific IP addresses as shown below to

# prevent Apache from glomming onto all bound IP addresses.

#

#Listen 12.34.56.78:80

Listen 80

#

# Dynamic Shared Object (DSO) Support

#

# To be able to use the functionality of a module which was built as a DSO you

# have to place corresponding `LoadModule' lines at this location so the

# directives contained in it are actually available _before_ they are used.

# Statically compiled modules (those listed by `httpd -l') do not need

# to be loaded here.

#

# Example:

# LoadModule foo_module modules/mod_foo.so

#

Include conf.modules.d/*.conf

#

# If you wish httpd to run as a different user or group, you must run

# httpd as root initially and it will switch.

#

# User/Group: The name (or #number) of the user/group to run httpd as.

# It is usually good practice to create a dedicated user and group for

# running httpd, as with most system services.

#

User apache

Group apache

# 'Main' server configuration

#

# The directives in this section set up the values used by the 'main'

# server, which responds to any requests that aren't handled by a

# <VirtualHost> definition.  These values also provide defaults for

# any <VirtualHost> containers you may define later in the file.

#

# All of these directives may appear inside <VirtualHost> containers,

# in which case these default settings will be overridden for the

# virtual host being defined.

#

#

# ServerAdmin: Your address, where problems with the server should be

# e-mailed.  This address appears on some server-generated pages, such

# as error documents.  e.g. admin@your-domain.com

#

ServerAdmin root@localhost

#

# ServerName gives the name and port that the server uses to identify itself.

# This can often be determined automatically, but we recommend you specify

# it explicitly to prevent problems during startup.

#

# If your host doesn't have a registered DNS name, enter its IP address here.

#

#ServerName www.example.com:80

#

# Deny access to the entirety of your server's filesystem. You must

# explicitly permit access to web content directories in other

# <Directory> blocks below.

#

<Directory />

    AllowOverride none

    Require all denied

</Directory>

#

# Note that from this point forward you must specifically allow

# particular features to be enabled - so if something's not working as

# you might expect, make sure that you have specifically enabled it

# below.

#

#

# DocumentRoot: The directory out of which you will serve your

# documents. By default, all requests are taken from this directory, but

# symbolic links and aliases may be used to point to other locations.

#

DocumentRoot "/var/www/html"

#

# Relax access to content within /var/www.

#

<Directory "/var/www">

    AllowOverride None

    # Allow open access:

    Require all granted

</Directory>

# Further relax access to the default document root:

<Directory "/var/www/html">

    #

    # Possible values for the Options directive are "None", "All",

    # or any combination of:

    #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews

    #

    # Note that "MultiViews" must be named *explicitly* --- "Options All"

    # doesn't give it to you.

    #

    # The Options directive is both complicated and important.  Please see

    # http://httpd.apache.org/docs/2.4/mod/core.html#options

    # for more information.

    #

    Options Indexes FollowSymLinks

    #

    # AllowOverride controls what directives may be placed in .htaccess files.

    # It can be "All", "None", or any combination of the keywords:

    #   Options FileInfo AuthConfig Limit

    #

    AllowOverride None

    #

    # Controls who can get stuff from this server.

    #

    Require all granted

</Directory>

#

# DirectoryIndex: sets the file that Apache will serve if a directory

# is requested.

#

<IfModule dir_module>

    DirectoryIndex index.html

</IfModule>

#

# The following lines prevent .htaccess and .htpasswd files from being

# viewed by Web clients.

#

<Files ".ht*">

    Require all denied

</Files>

#

# ErrorLog: The location of the error log file.

# If you do not specify an ErrorLog directive within a <VirtualHost>

# container, error messages relating to that virtual host will be

# logged here.  If you *do* define an error logfile for a <VirtualHost>

# container, that host's errors will be logged there and not here.

#

ErrorLog "logs/error_log"

#

# LogLevel: Control the number of messages logged to the error_log.

# Possible values include: debug, info, notice, warn, error, crit,

# alert, emerg.

#

LogLevel warn

<IfModule log_config_module>

    #

    # The following directives define some format nicknames for use with

    # a CustomLog directive (see below).

    #

    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined

    LogFormat "%h %l %u %t \"%r\" %>s %b" common

    <IfModule logio_module>

      # You need to enable mod_logio.c to use %I and %O

      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio

    </IfModule>

    #

    # The location and format of the access logfile (Common Logfile Format).

    # If you do not define any access logfiles within a <VirtualHost>

    # container, they will be logged here.  Contrariwise, if you *do*

    # define per-<VirtualHost> access logfiles, transactions will be

    # logged therein and *not* in this file.

    #

    #CustomLog "logs/access_log" common

    #

    # If you prefer a logfile with access, agent, and referer information

    # (Combined Logfile Format) you can use the following directive.

    #

    CustomLog "logs/access_log" combined

</IfModule>

<IfModule alias_module>

    #

    # Redirect: Allows you to tell clients about documents that used to

    # exist in your server's namespace, but do not anymore. The client

    # will make a new request for the document at its new location.

    # Example:

    # Redirect permanent /foo http://www.example.com/bar

    #

    # Alias: Maps web paths into filesystem paths and is used to

    # access content that does not live under the DocumentRoot.

    # Example:

    # Alias /webpath /full/filesystem/path

    #

    # If you include a trailing / on /webpath then the server will

    # require it to be present in the URL.  You will also likely

    # need to provide a <Directory> section to allow access to

    # the filesystem path.

    #

    # ScriptAlias: This controls which directories contain server scripts.

    # ScriptAliases are essentially the same as Aliases, except that

    # documents in the target directory are treated as applications and

    # run by the server when requested rather than as documents sent to the

    # client.  The same rules about trailing "/" apply to ScriptAlias

    # directives as to Alias.

    #

    ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"

</IfModule>

#

# "/var/www/cgi-bin" should be changed to whatever your ScriptAliased

# CGI directory exists, if you have that configured.

#

<Directory "/var/www/cgi-bin">

    AllowOverride None

    Options None

    Require all granted

</Directory>

<IfModule mime_module>

    #

    # TypesConfig points to the file containing the list of mappings from

    # filename extension to MIME-type.

    #

    TypesConfig /etc/mime.types

    #

    # AddType allows you to add to or override the MIME configuration

    # file specified in TypesConfig for specific file types.

    #

    #AddType application/x-gzip .tgz

    #

    # AddEncoding allows you to have certain browsers uncompress

    # information on the fly. Note: Not all browsers support this.

    #

    #AddEncoding x-compress .Z

    #AddEncoding x-gzip .gz .tgz

    #

    # If the AddEncoding directives above are commented-out, then you

    # probably should define those extensions to indicate media types:

    #

    AddType application/x-compress .Z

    AddType application/x-gzip .gz .tgz

    #

    # AddHandler allows you to map certain file extensions to "handlers":

    # actions unrelated to filetype. These can be either built into the server

    # or added with the Action directive (see below)

    #

    # To use CGI scripts outside of ScriptAliased directories:

    # (You will also need to add "ExecCGI" to the "Options" directive.)

    #

    #AddHandler cgi-script .cgi

    # For type maps (negotiated resources):

    #AddHandler type-map var

    #

    # Filters allow you to process content before it is sent to the client.

    #

    # To parse .shtml files for server-side includes (SSI):

    # (You will also need to add "Includes" to the "Options" directive.)

    #

    AddType text/html .shtml

    AddOutputFilter INCLUDES .shtml

</IfModule>

#

# Specify a default charset for all content served; this enables

# interpretation of all content as UTF-8 by default.  To use the

# default browser choice (ISO-8859-1), or to allow the META tags

# in HTML content to override this choice, comment out this

# directive:

#

AddDefaultCharset UTF-8

<IfModule mime_magic_module>

    #

    # The mod_mime_magic module allows the server to use various hints from the

    # contents of the file itself to determine its type.  The MIMEMagicFile

    # directive tells the module where the hint definitions are located.

    #

    MIMEMagicFile conf/magic

</IfModule>

#

# Customizable error responses come in three flavors:

# 1) plain text 2) local redirects 3) external redirects

#

# Some examples:

#ErrorDocument 500 "The server made a boo boo."

#ErrorDocument 404 /missing.html

#ErrorDocument 404 "/cgi-bin/missing_handler.pl"

#ErrorDocument 402 http://www.example.com/subscription_info.html

#

#

# EnableMMAP and EnableSendfile: On systems that support it,

# memory-mapping or the sendfile syscall may be used to deliver

# files.  This usually improves server performance, but must

# be turned off when serving from networked-mounted

# filesystems or if support for these functions is otherwise

# broken on your system.

# Defaults if commented: EnableMMAP On, EnableSendfile Off

#

#EnableMMAP off

EnableSendfile on

# Supplemental configuration

#

# Load config files in the "/etc/httpd/conf.d" directory, if any.

IncludeOptional conf.d/*.conf

[root@pm conf]#

oracle errors and how to resolve them

 fix for ORA-03113 end-of-file on communication channel:-

1. SQLPLUS / AS SYSDBA

2. startup mount;

SQL> alter database clear unarchived logfile group 1;

Database altered.

SQL> alter database clear unarchived logfile group 2;

Database altered.

SQL> alter database clear unarchived logfile group 3;

SQL> shut immediate;

SQL> startup ;

File Automation Script

 #!/bin/sh
 
echo "Enter file name: "
read file
if test -e ${file}
then
select user in empty directory readable writable
do
        case ${user} in
                "empty")
                        if test -s ${file}
                        then
                                echo "${file}-->is not empty"
                        else
                                echo "${file}-->is empty"
                        fi
                        ;;
                "directory")
                        if test -d ${file}
                        then
                                echo "${file}-->is a directory"
                        else
                                echo "${file}-->is not a directory"
                        fi
                        ;;
                "readable")
                        if test -r ${file}
                        then
                                echo "${file}-->is readable"
                        else
                                echo "${file}-->is not readable"
                        fi
                        ;;
                "writable")
if test -w ${file}
                        then
                                echo "${file}-->is writable"
                        else
                                echo "${file}-->is not writable"
                        fi
                        ;;
                "executable")
                        if test -x ${file}
                        then
                                echo "${file}-->is executable"
                        else
                                echo "${file}-->is not executable"
                        fi
                        ;;
        esac
done
else 
    echo "${file}-->not found"
fi

*********************************************************************

stat file.txt

  File: file.txt

  Size: 1               Blocks: 8          IO Block: 4096   regular file

Device: ch/12d  Inode: 229149      Links: 1

Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)

Access: 2023-08-17 11:26:26.803000000 +0530

Modify: 2023-08-17 11:26:26.803000000 +0530

Change: 2023-08-17 11:26:26.803000000 +0530

 Birth: -

database link in oracle database

 Make sure we have database entries of target db in tnsnames.ora

------------------------------------------------------------------

CREATE DATABASE LINK remote_db_link
CONNECT TO username IDENTIFIED BY password
USING 'remote_database_tns';

CREATE PUBLIC DATABASE LINK link_name
CONNECT TO username IDENTIFIED BY password
USING 'tns_string';

[oracle@pm admin]$ cat tnsnames.ora

chennai  =    # ----> this is "tns_string"

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = pm.shaikh.com)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SID = chennai)

    )

  )

SELECT * FROM remote_table@remote_db_link;

drop public database link db_link_name;

drop database link db_link_name;

select * from all_db_links;

select * from dba_db_links;

select * from user_db_links;

set lines 400;

col owner for a10;

col db_link for a30;

col username for a20;

col host for a20;

select owner,db_link,username,host from all_db_links;

How to find same columns in multiple tables/views

 How to find same columns in multiple tables/views

********************************************************

col table_name for a20;
col column_name for a20;
select 
a.table_name,a.column_name,
b.table_name,b.column_name,
c.table_name,c.column_name
from 
(select * from all_tab_columns where table_name='DBA_DATA_FILES') a
inner join
(select * from all_tab_columns where table_name='DBA_FREE_SPACE') b
on a.column_name=b.column_name
inner join 
(select * from all_tab_columns where table_name='DBA_EXTENTS') c
on b.column_name=c.column_name;

*************************************************************

TABLE_NAME           COLUMN_NAME          TABLE_NAME           COLUMN_NAME          TABLE_NAME           COLUMN_NAME         

-------------------- -------------------- -------------------- -------------------- -------------------- --------------------

DBA_DATA_FILES       FILE_ID              DBA_FREE_SPACE       FILE_ID              DBA_EXTENTS          FILE_ID             

DBA_DATA_FILES       TABLESPACE_NAME      DBA_FREE_SPACE       TABLESPACE_NAME      DBA_EXTENTS          TABLESPACE_NAME     

DBA_DATA_FILES       BYTES                DBA_FREE_SPACE       BYTES                DBA_EXTENTS          BYTES               

DBA_DATA_FILES       BLOCKS               DBA_FREE_SPACE       BLOCKS               DBA_EXTENTS          BLOCKS              

DBA_DATA_FILES       RELATIVE_FNO         DBA_FREE_SPACE       RELATIVE_FNO         DBA_EXTENTS          RELATIVE_FNO        

***********************************************************************************

Automation Script:-
-------------------------------
col table_name for a20;
col column_name for a20;
select 
a.table_name,a.column_name,
b.table_name,b.column_name,
c.table_name,c.column_name
from 
(select * from all_tab_columns where table_name = upper('&table_a')) a
inner join
(select * from all_tab_columns where table_name = upper('&table_b')) b
on a.column_name=b.column_name
inner join 
(select * from all_tab_columns where table_name = upper('&table_c')) c
on b.column_name=c.column_name;

******************************************************

dd ---> data duplication command powerful command to manipulate copying " dd if=first.txt of=second.txt"

 dd [if=input_file] [of=output_file] [bs=block_size] [count=num_blocks]

• if: Specifies the input file. This can be a regular file, a device (e.g., /dev/sda), or other data source. If not provided, dd will use standard input.
• of: Specifies the output file. This can be a regular file, a device, or other data destination. If not provided, dd will use standard output.
• bs: Sets the block size for data transfer. You can specify values like 1K, 4M, etc.
• count: Specifies the number of blocks to copy.
• skip: Skips a specified number of blocks before starting to copy data.
• seek: Skips a specified number of blocks in the output file before writing data.
• conv: Used for data conversion, such as changing the character encoding or converting uppercase to lowercase.
• status: Shows the progress of the dd command.

Create tablespace In Oracle database

Important Facts in Oracle:- physical structures:- data files, redo log files, archive log files, control files, parameter files, etc. logical structures:- tablespaces, extents, segments, etc. if you wish to see some visible content in physical files like data files, etc. $ strings system01.dbf Schemas ---> Take it as 'Container of all Objects created by a User in Database' Objects:- tables, procedures, functions, views, packages, etc. packages:- optimized collection of objects or say ease to access objects SYSTEM tablespace: This tablespace is created when the database is created and contains the data dictionary, which stores information about the database objects, such as tables, indexes, and constraints. The SYSTEM tablespace is used by the database itself, and it should not be used for storing user data. SYSAUX tablespace: This tablespace is used to store system-related metadata and noncritical system data. It includes components such as the Automatic Workload Repository (AWR), Oracle Text, and Oracle Spatial. This tablespace is created automatically when the database is created, and it is recommended to leave the SYSAUX tablespace as it is. TEMP tablespace: This tablespace is used to store temporary data that is generated during query execution, sorting, and joining. The TEMP tablespace is used by the database for performing operations that require large amounts of temporary storage. It is recommended to create a separate TEMP tablespace for each Oracle instance to improve performance. UNDO tablespace: This tablespace is used to store undo information, which is used to roll back changes made to the database. The UNDO tablespace is used by the database to support transactions and provides a way to recover the database to a previous state. It is recommended to create a separate UNDO tablespace for each Oracle instance to improve performance. USERS tablespace: This tablespace is used to store user data such as tables, indexes, and other objects. The USERS tablespace is created by default, and it is recommended to create additional tablespaces for storing user data to manage data growth and improve performance. INDEX tablespace: This tablespace is used to store indexes that are created on user tables. It is recommended to create separate INDEX tablespaces to improve performance by separating index data from user data. LOB tablespace: This tablespace is used to store Large Object (LOB) data such as images, videos, and other large files. It is recommended to create a separate LOB tablespace for each table that contains LOB data to improve performance and manage data growth.

 --- To create temporary tablespace 

CREATE TEMPORARY TABLESPACE temp_ts

TEMPFILE '/path/to/tempfile/temp01.dbf' 

SIZE 100M REUSE 

AUTOEXTEND ON NEXT 10M 

MAXSIZE UNLIMITED;

--- To create undo tablespace

CREATE undo TABLESPACE undo_ts

datafile '/path/to/undofile/undo01.dbf' 

SIZE 100M REUSE 

AUTOEXTEND ON NEXT 10M 

MAXSIZE UNLIMITED;

--- To create users tablespace

CREATE  TABLESPACE users_ts

datafile '/path/to/usersfile/users01.dbf' 

SIZE 100M REUSE 

AUTOEXTEND ON NEXT 10M 

MAXSIZE UNLIMITED;

--- To create system tablespace

CREATE  TABLESPACE system_ts

datafile '/path/to/systemfile/system01.dbf' 

SIZE 100M REUSE 

AUTOEXTEND ON NEXT 10M 

MAXSIZE UNLIMITED;

--- To create sysaux tablespace

CREATE  TABLESPACE sysaux_ts

datafile '/path/to/sysauxfile/sysaux01.dbf' 

SIZE 100M REUSE 

AUTOEXTEND ON NEXT 10M 

MAXSIZE UNLIMITED;

--- To create LOB tablespace (stores large objects like BLOBs, CLOB, etc)

CREATE  TABLESPACE lob_ts

TEMPFILE '/path/to/lobfile/lob01.dbf' 

SIZE 100M REUSE 

AUTOEXTEND ON NEXT 10M 

MAXSIZE UNLIMITED;

Create Linux Command Using "/usr/sbin" system executable (commands)

 ln -s /path/to/shell_script.sh  /usr/sbin/your_command_name