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Full Discussion: For Loop Range Create Directories
Top Forums Shell Programming and Scripting For Loop Range Create Directories Post 302527086 by jaysunn on Thursday 2nd of June 2011 10:26:33 AM
Old 06-02-2011
For Loop Range Create Directories
Hello,
I am a bit stumped on this. I am attempting to create 24 empty directories with a loop. Seems like I have incorrect syntax. When I run the following command I get the error below.

Command
Code:
$ for i in {2..24}; do mkdir $i_MAY_2011 ; done

Error x 24
Code:
mkdir: missing operand
Try `mkdir --help' for more information.

When I run the command as so it works but it creates brackets in the directory name which is unacceptable.

Command
Code:
$ for i in {2..24}; do mkdir {$i}_OPRA_MAY_2011 ; done

Directory Created
Code:
{N}_OPRA_MAY_2011

Would someone please be kind enough to explain what I am doing wrong here?

Thanks,
Jaysunn
 

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LEARN ABOUT LINUX

ndb_index_stat

NDB_INDEX_STAT(1)					       MySQL Database System						 NDB_INDEX_STAT(1)

NAME

       ndb_index_stat - NDB index statistics utility

SYNOPSIS

       ndb_index_stat options

DESCRIPTION

       ndb_index_stat ...
	       Usage

       To obtain basic index statistics about a given NDB table, invoke ndb_index_stat as shown here, with the name of the table as the first
       argument and the name of the database containing this table specified immediately following it, using the --database (-d) option:

	   ndb_index_stat table -d database

       In this example, we use ndb_index_stat to obtain such information about an NDB table named mytable in the test database:

	   shell> ndb_index_stat -d test mytable
	   table:mytable index:PRIMARY fragCount:4
	   sampleVersion:2 loadTime:1336751773 sampleCount:0 keyBytes:0
	   query cache: valid:1 sampleCount:0 totalBytes:0
	   times in ms: save: 12.380 sort: 0.001
	   NDBT_ProgramExit: 0 - OK

       The --verbose option provides some additional output, as shown here:

	   shell> ndb_index_stat -d test mytable --verbose
	   random seed 1337010518
	   connected
	   loop 1 of 1
	   table:mytable index:PRIMARY fragCount:4
	   sampleVersion:2 loadTime:1336751773 sampleCount:0 keyBytes:0
	   read stats
	   query cache created
	   query cache: valid:1 sampleCount:0 totalBytes:0
	   times in ms: save: 20.766 sort: 0.001
	   disconnected
	   NDBT_ProgramExit: 0 - OK
	   shell>

	       Options

       The following table includes options that are specific to the MySQL Cluster ndb_index_stat utility. Additional descriptions are listed
       following the table. For options common to most MySQL Cluster programs (including ndb_index_stat), see Options Common to MySQL Cluster
       Programs(1).

       Table 17.21. ndb_index_stat Options and Variables: MySQL Cluster NDB 7.2
       +---------------------------------+--------------------------------------+-------------------------------------+
       |Format				 | Description				| Added / Removed		      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Name of the database containing the	|				      |
       |       --database=name, 	 | table.				|	 All MySQL 5.5 based releases |
       |				 |					|				      |
       |       -d			 |					|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Delete index statistics for the	|				      |
       |       --delete 		 | given table, stopping any		|	 All MySQL 5.5 based releases |
       |				 | auto-update				|				      |
       |				 |	       previously configured.	|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Update index statistics for the	|				      |
       |       --update 		 | given table, restarting any		|	 All MySQL 5.5 based releases |
       |				 | auto-update				|				      |
       |				 |	       previously configured.	|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Print the query cache.		|				      |
       |       --dump			 |					|	 All MySQL 5.5 based releases |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Perform a number of random range	|				      |
       |       --query=#		 | queries on first key attr (must be	|	 All MySQL 5.5 based releases |
       |				 | int					|				      |
       |				 |	       unsigned).		|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Drop any statistics tables and	|				      |
       |       --sys-drop		 | events in NDB kernel (all statistics |	 All MySQL 5.5 based releases |
       |				 | are					|				      |
       |				 |	       lost)			|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Create all statistics tables and	|				      |
       |       --sys-create		 | events in NDB kernel, if none of	|	 All MySQL 5.5 based releases |
       |				 | them 				|				      |
       |				 |	       already exist		|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Create any statistics tables and	|				      |
       |       --sys-create-if-not-exist | events in NDB kernel that do not	|	 All MySQL 5.5 based releases |
       |				 |	       already exist.		|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Create any statistics tables or	|				      |
       |       --sys-create-if-not-valid | events that do not already exist in	|	 All MySQL 5.5 based releases |
       |				 | the					|				      |
       |				 |	       NDB kernel. after	|				      |
       |				 | dropping any that are invalid.	|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Verify that NDB system index 	|				      |
       |       --sys-check		 | statistics and event tables exist.	|	 All MySQL 5.5 based releases |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Do not apply sys-* options to	|				      |
       |       --sys-skip-tables	 | tables.				|	 All MySQL 5.5 based releases |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Do not apply sys-* options to	|				      |
       |       --sys-skip-events	 | events.				|	 All MySQL 5.5 based releases |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Turn on verbose output		|				      |
       |       --verbose,		 |					|	 All MySQL 5.5 based releases |
       |				 |					|				      |
       |       -v			 |					|				      |
       +---------------------------------+--------------------------------------+-------------------------------------+
       |				 | Set the number of times to perform a |				      |
       |       --loops=#		 | given command. Default is 0. 	|	 All MySQL 5.5 based releases |
       +---------------------------------+--------------------------------------+-------------------------------------+

       ndb_index_stat statistics options. The following options are used to generate index statistics. They work with a given table and database.
       They cannot be mixed with ndb_index_stat system options.

       o   --database=name, -d name

	   +--------------------+------------------+
	   |Command-Line Format | --database=name  |
	   +--------------------+------------------+
	   |			| -d		   |
	   +--------------------+------------------+
	   |			| Permitted Values |
	   |			+---------+--------+
	   |			| Type	  | string |
	   |			+---------+--------+
	   |			| Default | [none] |
	   |			+---------+--------+
	   |			| Range   | ..	   |
	   +--------------------+---------+--------+
	   The name of the database that contains the table being queried.

       o   --delete

	   +--------------------+-------------------+
	   |Command-Line Format | --delete	    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Delete the index statistics for the given table, stopping any auto-update that was previously configured.

       o   --update

	   +--------------------+-------------------+
	   |Command-Line Format | --update	    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Update the index statistics for the given table, and restart any auto-update that previously configured.

       o   --dump

	   +--------------------+-------------------+
	   |Command-Line Format | --dump	    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Dump the contents of the query cache.

       o   --query=#

	   +--------------------+------------------------+
	   |Command-Line Format | --query=#		 |
	   +--------------------+------------------------+
	   |			| Permitted Values	 |
	   |			+---------+--------------+
	   |			| Type	  | numeric	 |
	   |			+---------+--------------+
	   |			| Default | 0		 |
	   |			+---------+--------------+
	   |			| Range   | 0 .. MAX_INT |
	   +--------------------+---------+--------------+
	   Perform random range queries on first key attribute (must be int unsigned).

       ndb_index_stat system options. The following options are used to generate and update the statistics tables in the NDB kernel. They cannot
       be mixed with ndb_index_stat statistics options.

       o   --sys-drop

	   +--------------------+-------------------+
	   |Command-Line Format | --sys-drop	    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Drop all statistics tables and events in the NDB kernel.  This causes all statistics to be lost.

       o   --sys-create

	   +--------------------+-------------------+
	   |Command-Line Format | --sys-create	    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Create all statistics tables and events in the NDB kernel. This works only if none of them exist previously.

       o   sys-create-if-not-exist

	   +--------------------+---------------------------+
	   |Command-Line Format | --sys-create-if-not-exist |
	   +--------------------+---------------------------+
	   |			| Permitted Values	    |
	   |			+------------+--------------+
	   |			| Type	     | boolean	    |
	   |			+------------+--------------+
	   |			| Default    | true	    |
	   |			+------------+--------------+
	   |			| Range      | ..	    |
	   +--------------------+------------+--------------+
	   Create any NDB system statistics tables or events (or both) that do not already exist when the program is invoked.

       o   --sys-create-if-not-valid

	   +--------------------+---------------------------+
	   |Command-Line Format | --sys-create-if-not-valid |
	   +--------------------+---------------------------+
	   |			| Permitted Values	    |
	   |			+------------+--------------+
	   |			| Type	     | boolean	    |
	   |			+------------+--------------+
	   |			| Default    | true	    |
	   |			+------------+--------------+
	   |			| Range      | ..	    |
	   +--------------------+------------+--------------+
	   Create any NDB system statistics tables or events that do not already exist, after dropping any that are invalid.

       o   --sys-check

	   +--------------------+-------------------+
	   |Command-Line Format | --sys-check	    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Verify that all required system statistics tables and events exist in the NDB kernel.

       o   --sys-skip-tables

	   +--------------------+-------------------+
	   |Command-Line Format | --sys-skip-tables |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Do not apply any --sys-* options to any statistics tables.

       o   --sys-skip-events

	   +--------------------+-------------------+
	   |Command-Line Format | --sys-skip-events |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Do not apply any --sys-* options to any events.

       o   --verbose

	   +--------------------+-------------------+
	   |Command-Line Format | --verbose	    |
	   +--------------------+-------------------+
	   |			| -v		    |
	   +--------------------+-------------------+
	   |			| Permitted Values  |
	   |			+---------+---------+
	   |			| Type	  | boolean |
	   |			+---------+---------+
	   |			| Default | true    |
	   |			+---------+---------+
	   |			| Range   | ..	    |
	   +--------------------+---------+---------+
	   Turn on verbose output.

       o   --loops=#

	   +--------------------+------------------------+
	   |Command-Line Format | --loops=#		 |
	   +--------------------+------------------------+
	   |			| Permitted Values	 |
	   |			+---------+--------------+
	   |			| Type	  | numeric	 |
	   |			+---------+--------------+
	   |			| Default | 0		 |
	   |			+---------+--------------+
	   |			| Range   | 0 .. MAX_INT |
	   +--------------------+---------+--------------+
	   Repeat commands this number of times (for use in testing).

COPYRIGHT

       Copyright (C) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

       This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
       published by the Free Software Foundation; version 2 of the License.

       This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO

       For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
       at http://dev.mysql.com/doc/.

AUTHOR

       Oracle Corporation (http://dev.mysql.com/).

MySQL 5.5							    01/30/2014							 NDB_INDEX_STAT(1)
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