Configuring networking from the ESX service console command line

To configure networking from the ESX service console command line:

1. Ensure the network adapter you want to use is currently connected with the command:
   
   [root@server root]# esxcfg-nics –l
   
   The output appears similar to:
   
   Name PCI Driver Link Speed Duplex Description
   vmnic0 06:00.00 tg3 Up 1000Mbps Full Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet
   vmnic1 07:00.00 tg3 Up 1000Mbps Full Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet
   
   In the Link column, Up indicates that the network adapter is available and functioning.

2. List the current virtual switches with the command:
   
   [root@server root]# esxcfg-vswitch –l
   
   The output appears similar to:
   
   Switch Name Num Ports Used Ports Configured Ports Uplinks
   vSwitch0 32 3 32 vmnic0
   
   PortGroup Name Internal ID VLAN ID Used Ports Uplinks
   VM Network portgroup2 0 0 vmnic0
   
   In the example output, there exists a virtual machine network named VM Network with no Service Console portgroup. For illustration, the proceeding steps show you how to create a new virtual switch and place the service console port group on it.
   
   
3. Create a new virtual switch with the command:
   
   [root@server root]# esxcfg-vswitch –a vSwitch1
   
   
4. Create the Service Console portgroup on this new virtual switch:
   
   [root@server root]# esxcfg-vswitch –A “Service Console” vSwitch1
   
   Because there is a space in the name (Service Console), you must enclose it in quotation marks.
   
   Note: To create Service Consoles one at time, you may need to delete all previous settings. For more information, see Recreating Service Console Networking from the command line (1000266).
   
   
5. Up-link vmnic1 to the new virtual switch with the command:
   
   [root@server root]# esxcfg-vswitch –L vmnic1 vSwitch1
   
   
6. If you need to assign a VLAN, use the command:
   
   [root@server root]# esxcfg-vswitch -v -p “Service Console” vSwitch0
   
   where is the VLAN number. A zero here specifies no VLAN.
   
   
7. Verify the new virtual switch configuration with the command:
   
   [root@server root]# esxcfg-vswitch –l
   
   The output appears similar to:
   
   Switch Name Num Ports Used Ports Configured Ports Uplinks
   vSwitch0 32 3 32 vmnic0
   
   PortGroup Name Internal ID VLAN ID Used Ports Uplinks
   Service Console portgroup5 0 1 vmnic0
   
   Switch Name Num Ports Used Ports Configured Ports Uplinks
   vSwitch1 64 1 64 vmnic1
   
   PortGroup Name Internal ID VLAN ID Used Ports Uplinks
   Service Console portgroup14 0 1 vmnic1
   
   
8. Create the vswif (Service Console) interface. For example, run the command:
   
   [root@server root]# esxcfg-vswif –a vswif0 –i 192.168.1.10 –n 255.255.255.0 –p “Service Console”
   [‘Vnic’ warning] Generated New Mac address, 00:50:xx:xx:xx:xx for vswif0
   
   Nothing to flush.
   
   
9. Verify the configuration with the command:
   
   [root@esx]# esxcfg-vswif –l
   Name Port Group IP Address Netmask Broadcast Enabled DHCP
   v swif0 Service Console 192.168.1.10 255.255.255.0 192.168.1.255 true false
   
   
10. Verify the networking configuration on the ESX host. See Verifying ESX host networking configuration on the service console (1003796) .
    
    
    URL:
    http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1000258
    
    
    http://planetvm.net/blog/?p=423

Oracle DDL,DML,DCL,TCL 基礎概念

DDL

Data Definition Language (DDL) statements are used to define the database structure or schema. Some examples:

• CREATE - to create objects in the database
• ALTER - alters the structure of the database
• DROP - delete objects from the database
• TRUNCATE - remove all records from a table, including all spaces allocated for the records are removed
• COMMENT - add comments to the data dictionary
• RENAME - rename an object

DML

Data Manipulation Language (DML) statements are used for managing data within schema objects. Some examples:

• SELECT - retrieve data from the a database
• INSERT - insert data into a table
• UPDATE - updates existing data within a table
• DELETE - deletes all records from a table, the space for the records remain
• MERGE - UPSERT operation (insert or update)
• CALL - call a PL/SQL or Java subprogram
• EXPLAIN PLAN - explain access path to data
• LOCK TABLE - control concurrency

DCL

Data Control Language (DCL) statements. Some examples:

• GRANT - gives user's access privileges to database
• REVOKE - withdraw access privileges given with the GRANT command

TCL

Transaction Control (TCL) statements are used to manage the changes made by DML statements. It allows statements to be grouped together into logical transactions.

• COMMIT - save work done
• SAVEPOINT - identify a point in a transaction to which you can later roll back
• ROLLBACK - restore database to original since the last COMMIT
• SET TRANSACTION - Change transaction options like isolation level and what rollback segment to use

轉至:

http://www.cnblogs.com/gnielee/archive/2009/07/31/1535621.html