roomba maintenance

The ORACLE tutorial is to use and maintain the password file of the Oracle database. Summary: Oracle relational database system has been widely used for its excellent performance. Ensuring database security is an important part of database management. This article provides a detailed introduction to the creation, use, and maintenance of the password file of the Oracle database system based on the summary of the Oracle database security management work

Oracle maintenance commonly used statement instance Article as a friend interested in oracle, will certainly be interested in this article oracle maintenance commonly used statement examples. View the table space name and size: Select t. tablespace_name, round (sum (bytes/(1024*1024), 0) ts_size from dba_tablespaces t, dba_data_files d where t. tablespace_name = d. tablespace_name group by t. tablespace_na

Updating a maintenance server is one of the most common things a site needs to do, and an initiative that must be taken seriously. Server is the root of the site, the smooth operation of the site can not be separated from the server. In the maintenance of the replacement server, we need to pay attention to the following aspects in order to do better:First, the problem caused by DNS resolution. When we repla

[JAVAEE Study Notes] hibernate03: Multi-table operation details, cascade, link maintenance and exercises: add Contacts, javaeehibernate03 One-to-many | multiple-to-one 1. relationship expression Table expressions 　　 Expressions in entities 　　 Expression in orm metadata One-to-multiple Many-to-one 2. Operation Operation association property // 3 operation Customer c = new Customer (); c. setCust_name ("Chuanzhi podcast"); LinkMan lm1 = new LinkMan ()

Some experience in using MYSQL services, mainly from the following aspects: MYSQL service planning and design. 1. the versatility of the installation and configuration of the MYSQL service; 2. convenient system upgrade and data migration; 3. fast backup and system recovery; and the planning of the MYSQL server for future maintenance, to upgrade the backup convenience and data security, it is best to use the MYSQL service experience of MYSQL, mainly fr

Article title: Linux kernel maintenance staff gradually become older and later enthusiastic about the decline. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. The annual Linux developer conference was held in San Francisco last week. at the conference, Jim Zemlin, executive director of the Linux Foundation, said t

What kind of LINUX should I install as a Cainiao who wants to do system maintenance in the future? -- Linux general technology-Linux technology and application information. for details, refer to the following section. What kind of LINUX should I install as a Cainiao who wants to do system maintenance in the future? I feel that there are many LINUX versions. what kind of LINUX version should I learn if I wa

VDI-VMDK for virtual machine environment maintenance, VMDK for virtual machine environment maintenance, VDI-VMDK for maintenance, VMDK for three times after being abused by Virutal Box, I was happy to give up. VDI Virtual hard disk is really awesome. I am hurt in my heart. Fortunately, VDI can be switched to VMDK, while the Virtual Machine of Virtual box can also

We all know that log files are the main reference for restoring database data, so the actual maintenance of MySQL database log files is also very important. When the MySQL database and related log files are used together, you sometimes want to delete the old backup log files and tell MySQL to start recording in the new files. This article describes how to enable the new We all know that log files are the main reference for restoring database data, so

Sorted out the Common commands of RedHatAS5Linux (host maintenance routine collection) 1. Authorized command chmodchmod permission directory/file example for the read permission of the test directory: chmod + r/etc/testlinux, directory permission: 666 File Permission: 777 each file has three permissions: read, write, and executable. 2. Add useradd: useraddte Sorted out the Common commands of RedHat AS5 Linux (host

5002, Catalyst 5500, Catalyst 5505, and Catalyst 5509, all of which are Catalyst 5000 enhanced. The old device used in this project is a Catalyst 5509 switch. Taking the common Catalyst 5509 as an example, there are nine slots in the Catalyst 5509 rack. The first slot is used in the Supervisor Engine module, which provides layer-3 switching and remote network management, the module has dual-port and full-duplex Fast Ethernet interfaces. The maximum speed of 5000 Mbps can be used to connect othe

device in the Riverbed Granite Edge branch. By converting the communication between the server and the storage from a continuous transaction to a parallel transaction, Riverbed Granite optimizes the storage traffic between the data center and the branch. This improves the server's efficiency in obtaining storage data and enables the server to be deployed farther away from storage resources. Therefore, the network administrator can deploy applications on the SteelheadEX device as virtual servers

The Catalyst 6000 series and Catalyst 5000 Series LAN switches are powerful, including many usage and maintenance commands. Below are several common commands and simple descriptions. For all maintenance commands, see the related manual provided with the hardware device. 1. Port Settings Set port name Set port name mod_num/port_num [name_string] Set port priority Set port level mod_num/port_num noramal | hi