linux Performance tuning methodology of system database server
One ,I/O Tuning in progress I/O Many decisions have to be made when tuning . Is the original device or file system used ? Whether to use direct ...
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Network error problem :RTNETLINK answers: File exists Error paste ：[root@localhost network-scripts]# systemctl restart networkJob for network.serv...
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If you want to achieve ping Add time information , And then save it to a file in real time , Well, then awk combination 1, only need ping informat...
Linux Common basic commands View help documents
In our use Linux When you order , How do you know what options are available under this command ? （ One ） command --help It's usually Linux...
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The following dellR720 take as an example Restart the machine by pressing F11 enter bootmanager, choice biosbootMenu choice FrontUSB choice ins...
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CentOS6 Turn off the firewall using the following command ,// Temporarily Closed serviceiptablesstop// Do not start chkconfigiptablesoffCentOS7 If ...
Linux pid_t Definition of type
pid_t Type in Linux It is used to define process in environment programming ID, The header file needs to be introduced , First look at the header f...
【Linux kernel 】 memory management （ One ）
For memory management , We need to know a few first _linux memory management
Linux build Mysql Master slave server
When building a server, the database can be said to be the bottleneck of the server , When the server pressure is high, most of the bottlenecks ar...
Linux Next restart Oracle database
1. with oracle User login linux2. with sysdba Sign in ：sqlplus / as sysdba3. Start the database , Enter the command ： startup4. close database , En...
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