nnnn mmmm

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Why does the disk space remain unchanged after the file is deleted?

/alert_dbticb.log (deleted )... Oracle 23492 oracle 6 w REG 253,0 16749822091 215748/home/oracle/admin/dbticb/bdump/alert_dbticb.log (deleted) oracle 23492 oracle 7u REG 36282, 0 0/home/oracle/product/10.2.0/db_1/dbs/lkinstdbticb (deleted) oracle 23492 oracle 8 w REG 16749822091, 0 215748/home/oracle/admin/dbticb/bdump/alert_dbticb.log (deleted) oracle 23494 oracle 10u REG 36307, 0 0 10.2/home/oracle/product/. 0/db_1/dbs/lkinstrmandb (deleted) from the output result, we can see that/home/oracle/

How to limit the Apache log file size (error. log, access. log)

preceding log file.Access. after running log on the WEB server for a long time, it may reach dozens or hundreds of megabytes. If an error occurs during Apache running, the error occurs. the log size will also increase to dozens of megabytes. It is very memory-consuming for the system to read and write a large text file. Therefore, it is necessary to limit the log file size. By referring to the http://httpd.apache.org/docs/2.0/programs/rotatelogs.html, you can use apache's own program rotate

After Linux deletes a file, the space is not released.

automatically reclaim disk space. In this environment, many processes are using this file, stopping a process is a little troublesome, and there is a high risk that when a file is opened in linux, the Linux kernel creates a directory named "pid" for each process in/proc/"/proc/nnnn/fd/directory (nnnn is pid)" to save the process information, the sub-directory fd stores the fd (fd: file descriptor) of all f

Full annotation of spring boot MyBatis

automatically convert the database's NN_NN format field to the hump named parameter in the Java result set objectMybatis.configuration.mapunderscoretocamelcase=True5. Result mapping @results  If the result set is not a Java object but the column name in Map,map is the same as the NN_NN in the database, the hump is not automatically converted .You can use @Result to indicate a result map, as well as for Java objects@Results ({ @Resultproperty ="nnNn

Linux commands to set up a wireless connection

Using the Iwconfig command --------------------------------- Iwconfig wlan0 Essid "Spaek" Iwconfig WLAN Key s:liudehua123 Dhclient Wlan0 ------------------------------------------------- Iwconfig is one of the user layer configuration tools for the Linux Wireless Extensions (LWE). Lwe is a tool for configuring wireless networks under Linux, including kernel support, user-level configuration tools, and driver interface support. Many wireless cards now support lwe, and the mainstream Linux release

Summary of how PHP generates a unique order number

First Kind The code is as follows: return date (' Ymd '). Str_pad (Mt_rand (1, 99999), 5, ' 0 ', str_pad_left); Second Kind The code is as follows: return date (' Ymd '). substr (Implode (NULL, Array_map (' Ord '), Str_split (substr (Uniqid (), 7, 13), 1)), 0, 8); Third Kind 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28-29 Generate 24-bit unique order number, format: YYYY-MMDD-HHII-SS-NNNN,

BAT file syntax and techniques (BAT file writing and use _dos/bat

of choice: CHOICE [/C choices] [/n] [/cs] [/T timeout/d CHOICE] [/M text] Describe: The tool allows the user to select an item from the select list and return the index of the selected item. Parameter list: /C choices Specifies the list of options to create. The default list is "YN". /n Hides the list of options in the prompt. Prompts the previous message to be displayed and the option is still enabled. /cs allows you to select options that are case-insensitive. By default, this tool is no

How to use JQuery datepicker _jquery

); Yearrange:string: ' -10:+10 ' Control the number of years displayed in the Drop-down list for the year, either relative to the current year (-NN:+NN) or absolute (-nnnn:+nnnn) Initial: $ ('. Selector '). DatePicker ({yearrange: ' 2000:2010 '}); Get: var Yearrange = $ ('. Selector '). DatePicker (' option ', ' yearrange '); Set: $ ('. Selector '). DatePicker (' option ', ' yearrange ', ' 2000:2010

BAT file Learning Use guide _dos/bat

the select list and return the index of the selected item. Parameter list: /C choices Specifies the list of options to create. The default list is "YN". /n Hides the list of options in the prompt. Prompts the previous message to be displayed and the option is still enabled. /cs allows you to select options that are case-insensitive. By default, this tool is not case-by-case. /T Timeout The number of seconds to pause before making a default selection. The acceptable values are from 0 to 9999. If

Some of the command parameters that are required to write batch processing techniques _dos/bat

return the index of the selected item. Parameter list: /C choices Specifies the list of options to create. The default list is "YN". /n Hides the list of options in the prompt. Prompts the previous message to be displayed, option is still enabled. /cs allows you to select options that are case-insensitive. By default, this tool is written in the same case. /T Timeout The number of seconds to pause before making a default selection. The acceptable value is from 0 to 9999. If 0 is specified, ther

Implementation code for C # calling. bat file _c# Tutorial

syntax, which is the syntax for the Choice command in Windows 2003, is similar to the command syntax for other versions of choice: CHOICE [/C choices] [/n] [/cs] [/T timeout/d CHOICE] [/M text] Describe: The tool allows the user to select an item from the select list and return the index of the selected item. Parameter list: /C choices Specifies the list of options to create. The default list is "YN". /n Hides the list of options in the prompt. Prompts the previous message to be displayed, opti

"Visual Studio.NET has detected that the specified Web server is not running a asp.net1.1 version. You will not be able to run a asp.net Web application or service solution to the problem

experience this error, it may be a configuration issue. To correct a problematic installation or configuration, you can use the ASP.net utility named aspnet_regiis. This command-line utility can be found in a path similar to the following:C:\WINDOWS\Microsoft.NET\Framework\v1.1.nnnn\where nnnn represents the four-bit build number. Look under the highest version number. Use the/I switch to run the utility:a

How to migrate Master devices

the new master device differs from the old device size, the server shut down. Note that the new system table will be rewritten and you will need to adjust the size of the master device in the sysdevices system table. Please perform the following two steps: Start the server in Single-user mode. If the new device size differs from the old device size, follow:1> sp_configure "allow updates", 12> Go1> Update sysdevices set high=nnnn where name= "master

SQLite Time Processing

, modifier, modifier, ...) equivalent to strftime ("%y-%m-%d%h:%m:%s",...)Julianday (Date time string, modifier, modifier, ...) equivalent to strftime ("%J",...)Date Time stringYou can use the following formats:Format has strict requirements 2008-06-15 03:35:28 date can only be separated by '-', time can only be separated by ': ',less than two digits must be 0 Yyyy-mm-dd YYYY-MM-DD hh:mm YYYY-MM-DD HH:MM:SS Yyyy-mm-dd HH:MM:SS. Sss yyyy-mm-ddthh:mm Yyyy-mm-ddthh:mm:ss Yyyy-mm-dd

C # Tutorial C # Regular expressions

matches the carriage return \u000d. (\ r is not equivalent to line break \ n.) \ r \ n (\w+) "\r\hello\nworld." In "\r\nhello" The \v matches the Vertical tab \u000b. [\v] {2,} "\v\v\v" in "\v\v\v" \f matches the page break \u000c. [\f] {2,} "\f\f\f" in "\f\f\f" \ n matches line break \u000a. \ r \ n (\w+) "\r\hello\nworld." In "\r\nhello" The \e matches the escape character \u001b. \e "\x001b" in "\x001b" \ nnn Specifies a character using the octal representation (NNN is made up of two to thre

PHP method for generating unique order numbers

There was an e-commerce project a while ago and an order number needs to be generated. At that time, it was easy to consider adding a random number to the system time or using the uniqid () method. After careful consideration of the above method, the possibility of duplicate orders is zero when the customer buys a small amount, but the first type is generated during the purchase of beebot The code is as follows: Return date ('ymmd'). str_pad (mt_rand (1, 99999), 5, '0', STR_PAD_LEFT ); Second

After Linux deletes a file, the space is not released.

/lkinstrmandb (deleted) from the output result, we can see that/home/oracle/admin/dbticb/bdump/alert_dbticb.log is still in use. how can the process be released if the space is not released? One way is to kill the corresponding process, or stop the application that uses this file, so that the OS can automatically reclaim disk space. in this environment, many processes are using this file, stopping a process is a little troublesome, and there is a high risk that when a file is opened in linux, th

DNS Chapter 3 of Windows Server 2012

=" "height=" 244 "/> Add the private root in the Server01 in the same way The private root is now created. Finally in Server01 and Server02 on the other side to resolve the domain name to see whether the success On the Server01. 650) this.width=650; "title=" nnn "style=" border-left-0px; border-right-width:0px; border-bottom-width:0px; border-top-width:0px "border=" 0 "alt=" nnn "src=" http://s3.51cto.com/wyfs02/M01/5D/CC/wKioL1UklbvxagApAAA_ 2y1f8ze704.jpg "width=" 244 "height=" 161 "/> On the

PHP method for generating unique order numbers

There was an e-commerce project a while ago and an order number needs to be generated. At that time, it was easy to consider adding a random number to the system time or using the uniqid () method. Carefully consider the above method, when the customer buys less, order There was an e-commerce project a while ago and an order number needs to be generated. At that time, it was easy to consider adding a random number to the system time or using the uniqid () method. Carefully consider the above met

Terminatingtheinstanceduetoerror481 causes failure of ASM startup

], requested by (instance = 2, osid = 13986 (PMON), summary = [abnormal instance termination]. Tue Nov 18 14:48:50 2014 ORA-1092: opitsk abortingprocess Instance terminated byPMON, pid = 13986 On the Metalink website, we found a document, ASM onNon First Node (Second or Other Node) Fails to Come up With: PMON (ospid: nnnn ): terminating the instance due to error 481 [ID 1383737.1]. According to this document, the title of the "PMON (ospid: 9946):

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