protected] becks]$ screen-r 6263To exit the session of screen, just like exit the shell, you only need to type the Exit command , and you will get the following prompt when you exit successfully[Screen is terminating]"Reprint 2"Linux Screen Command detailedfunction Description:telnet or ssh telnet to Linux, if the connection is not normal interruption, reconnect, the system will open a new session, unable to restore the original Session.screen comman
to be generated needs to be written at the top of the makefile, and its approximate execution logic is this:1) After the make command is entered on the command line, the makes command reads the makefile file in the current directory first2) make handles the first rule in Makefile, which is the connection generated example executable file above3) After you complete the first rule, you need to first deal with the target file that example depends on, namely SORT.O, COMPUTE.O, MAIN.O, the target fi
, the choice between long and short connections depends on the situation.
First, if you use a long connection and do not have any operations on the database for a long time, after the timeout value, the MySQL server closes the connection, and the client gets an error similar to the "MySQL server has gone away" when it executes the query.
After using Mysql_real_connect to connect to the database, use the Mysql_options (mysql, Mysql_opt_reconnect, ...) to set the automatic
Databases that are constantly updated and optimized can run at a faster rate. However, the idea of moving a database directly from a smaller disk to another larger disk is not possible. Before you transfer the database, you must disconnect all operations from the database. You can use the sp_detach_db stored program to isolate the database from SQL Server 2000, which enables offline operation of the database. You can also run another stored program sp_attach_db to
You can remove Microsoft Windows SharePoint Services from a virtual server using HTML Administration or the command-line administration tool. Both of these tools allow you to retain or delete content when you delete Windows SharePoint Services.Remove Windows SharePoint Services from a virtual server with HTML administration pagesClick Start, point to All Programs, point to Administrative Tools, and then click SharePoint Central Administration.On the Central Administration page, under Virtual Ser
One, the error: "can ' t swap PDO instance while within transaction"
By querying the Laravel source code, you can confirm that the exception was thrown in the setPdo method:
Literally, this error occurs because the database connection has been switched on when the transaction is turned on. Sometimes, however, this error can occur even if there is no explicit switch to the database connection in the code. For example, when executing a query statement error, the system will tryAgai
Apple computers sometimes have a wireless connection, sometimes it may be a problem with the system network components, but also may be the current system of some bugs caused, but also may be other factors, such as routers. Here's a quick introduction to some of the ways that Apple computers can't connect to wireless.
Try to turn off the MAC's wireless network
1, when found that the MAC computer can not connect to the wireless network, we can first try to shut down the wireless network. Clic
shown in Figure 1.
It shows that there are multiple wireless networks available, double-click Tp-link to connect to the wireless router, and then connect successfully.
(2) Open IE Browser, enter IP address: 192.168.1.1 (wireless router default LAN IP address).
(3) Login to the wireless Router Management interface (username: admin, Password: admin).
Click the LAN port settings option under Network Parameters on the left side of the interface to set the IP address to 192.168.1.8 and save.
(4
connection is disconnected, slave will attempt to reconnect master. When the following conditions are met, incremental synchronization occurs after the connection is repeated:1. The master server ID for the slave record is the same as the master server ID that is currently being connected2. Slave's replication offset is higher than Master's offset. Like slave is 1000, master is 1100.3. The data specified by the replication offset for slave is still s
software and your ISP's host is interrupted, mostly due to a phone line interruption.Workaround: In the message dialog box, select: Reconnect (Reconnect).Hint: File not Found The requested url/jiangbo/index.htm is not Found on this server.Usually the reason: The file was not found and the specified URL xxxxxx file was not found on the server. The computer specified by the user in the URL is already connect
operation of the HBase
[Root@master conf]# JPS
3945 hmaster 18681 runjar 2699 namenode 3330 nodemanager
2951 Secondarynamenode
3226 ResourceManager
3874 hquorumpeer
18901
Found everything was okay.
Next check the Hive Log discovery: All zookeeper Connection failed
Opening socket connection to server localhost/127.0.0.1:2181
2017-05-25t03:06:12,259 INFO [9b1835d1-6488-4521-99d5-88d3e786be46 main-sendthread (localhost:2181)] zookeeper. Clientcnxn:opening socket connection to server localhost
)? Defaults to ' false '. No false high availability and clustering AutoReConnect Should the driver try to re-establish bad connections? No false autoreconnectforpools use a reconnection strategy appropriate for connection pools (defaults to ' false ') no false Failoverreadonly when failing over in AutoReConnect mode, should the connection is set to ' read-only '? No true maxreconnects Maximum number of reconnects to attempt if AutoReConnect was true, default is ' 3 '. No 3 initialtimeout If aut
is set by the app that created the session. If the server does not receive any requests within the time-out period, the corresponding session expires. Once a session has expired, it cannot be reopened, and any ephemeral znode associated with that session will be lost. Sessions usually persist for a long time, and session expiration is a rare event, but it is still important for the app to handle session expiration.
A ping request (also known as a heartbeat) can be sent through the client to kee
, such as the use of GBK in the program, The data type of the database is UTF8, and there is an issue where the parameters cannot be recognized, causing the data to be returned without being expected. To resolve this issue, we need to set the Characterencoding=utf8 on the URL. Example code: Jdbc:mysql://localhost:3306/test? useunicode=truecharacterencoding=utf8
AutoReConnectWhether to automatically reconnect when the database connection is
//Do not display column information-O,--set-variable=name//Set Variable usage is--set-variable=var_name=var_value--sigint-ignore//Ignore SIGINT symbol (results of control-c when logging out)-O,--one-database//ignores statements except for the default database named in the command line. You can help skip updates to other databases in the log.--pager[=name]//Use a pager to display the query output, this to Linux can be used more,less and so on.--no-pager//Do not use a paging device to display the
Password:welcome to the MySQL Monitor. Commands End With; or \g.your MySQL connection ID is 6Server Version:5.1. --Log Source Distribution Copyright (c) -, ., Oracle and/or its affiliates. All rights reserved. Oracle isA registered trademark of Oracle Corporation and/or Itsaffiliates. Other names trademarks of their respectiveowners. Type'Help ;'Or'\h' forHelp. Type'\c'To clear the current input statement. mysql>To operate according to the host internal installation of MySQL, the above command
display column information-O,--set-variable=name//Set Variable usage is--set-variable=var_name=var_value--sigint-ignore//Ignore SIGINT symbol (results of control-c when logging out)-O,--one-database//ignores statements except for the default database named in the command line. You can help skip updates to other databases in the log.--pager[=name]//Use a pager to display the query output, this to Linux can be used more,less and so on.--no-pager//Do not use a paging device to display the query ou
not display column information-O,--set-variable=name//Set Variable usage is--set-variable=var_name=var_value--sigint-ignore//Ignore SIGINT symbol (results of control-c when logging out)-O,--one-database//ignores statements except for the default database named in the command line. You can help skip updates to other databases in the log.--pager[=name]//Use a pager to display the query output, this to Linux can be used more,less and so on.--no-pager//Do not use a paging device to display the quer
.
Download in-depth principles of WEP and WPA passwords
Countermeasures against various situations when cracking WEP:
When data is increased to more than 15 thousand, aircrack-ng is used for cracking.
Position of the captured package:/tmp/feedingbottle
I. Clients
1. Clients with valid clients generate a large amount of valid data and can directly obtain a large number of IVs.
2. A valid client can only generate a small amount of IVs data.
A large number of ivs are generated by injecting
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