Open Virtual Machine Discovery instance does not come up[Email protected] ~]# su-oracleSq[[email protected] ~]$ sqlplus/as SYSDBASql*plus:release 11.2.0.4.0 Production on Tue 2 14:59:54 2016Copyright (c) 1982, Oracle. All rights reserved.Connected to an idle instance.[Email protected] Odb>startup nomoutSp2-0714:invalid combination of the STARTUP options[Email protected] ~]$ oerr ora 00084500845, 00000, "Memory_target not supported in this system"*cause:the memory_target parameter is not supporte
/dev/null, from the name can be clearly seen as an empty file (write to/dev/null all lost, read/dev/null when you return to EOF), then you will be very puzzled, what is the use of him, please see below to listen to me, perhaps you have seen in a lot of scripts Dev/null, the specific summary of several common uses.
p
Address: http://docs.huihoo.com/android/2.2/guide/practices/screens_support.html
This article is a bit outdated, and there should be the latest on the network.
Supports multiple screens
Android is designed to run on a variety of devices that provide screen sizes and resolutions. For applications, the platform provides consistent cross-device environment and handles many complex application UIS to adapt t
First, UIWindow objectEach app has a UIWindow object, which, like a container, is used to contain all the views in the app, and the app creates and sets the UIWindow object at startup.-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (nsdictionary *) launchOptions { // Override point for customization after application launch. Self.window = [[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]]; // Add Viewcontroller Viewcontroller *cont
1.Linux composition kernel, shell, tool program has Sh.bashAn example!#/bin/bashEcho 'Before execution chmod +xExecution./2. a little trick cp/dev/null/var/log/apache2/access.logUse/dev/null to apache2 log files in the clear sky Note: Think of /dev/null as a "black hole". It is very equivalent to a write-only file. All content written to it is lost forever. and t
First,/dev/shm theory
The kernel configuration in the default Linux distribution will open Tmpfs and map to the SHM directory under/dev/. You can view the results through the DF command.
/dev/shm/is the next most useful directory for Linux because it's not on the hard drive, it's in memory. Therefore, under Linux, there is no need for a lot of trouble to build
Environment: VMware WorkstationCentos7.2 x64A failure occurred:Divide two partitions on two disks to do PV (physical Volume):Modify two partition ID to 8ePvcreate/dev/sdb7/dev/sdc7Can ' t open/dev/sdb7 exclusively. Mounted filesystem?Because these two disks were previously used for soft Raid5, uninstall RAID5 First and then delete them.Umount/
Token has something, But input devnull to check whether there is anything. = 1>/dev/null 2> 1
Why do I write it in/dev/nullcontext? I have tested that there is something in the input a.txt, but there is nothing in the input/dev/null.
Reply content:
= 1>/dev/null 2> 1 Why do I write it in/
text, but will be mentioned later in the chapter. You can also display toast as follows:
Toast. maketext (context, text, duration). Show ();
Copy code
Toast display position
The standard toast is displayed in the left-right corner of the screen. You can also use the setgravity (INT, Int, INT) method to customize the location, for example:
Toast. setgravity (gravity. Top | gravity. Left, 0, 0 );
Copy code
If you want to offset toast to the right, add the second parameter, and then add the
Added devshm space linuxdevshmOracle11g cannot start, error: Java code ORA-00845: MEMORY_TARGETnotsupportedonthissystem Web Query said OracleSGA set more than devshm space will report this error. How to modify d add/dev/shm space linux/dev/shm Oracle 11g cannot start, error: Java code ORA-00845: MEMORY_TARGET not supported on this system indicates that this error is reported when the ratio of/
Data Analysis System DIY2/3: Local 64-bit WIN7 + dev c ++ compiler for VMware CentOS7 + MariaDB, diy2win7
Three tasks to be completed in DIY data analysis system.
1. Use VMware to install 64-bit CentOS. The database server can use the built-in CentOS.
2. Data collection and pre-processing are programmed using Dev-C ++.
3. Use MATLAB R2012b on local Win7 64 to connect to the database for mining and analysis.
Add/dev/shm space linux/dev/shm Oracle 11g cannot start, error: Java code ORA-00845: MEMORY_TARGET not supported on this system indicates that this error is reported when the ratio of/dev/shm space set by Oracle SGA is large. How to modify the size of/dev/shm? /Dev/shm is mo
In Linux, what is the difference between the content in the/dev/directory and that in the/proc/file devices? I'mWhen I did an experiment on the board, I found that when I loaded the driver module to the Board, there were changes in the devices file, and there was no change at all under/dev, shouldn't it be a device connection under/dev/? Why?When the module estab
The shell can often be seen: >/dev/null 2>1
Eg:sudo kill-9 ' ps-elf |grep-v grep|grep $1|awk ' {print $4} ' 1>/dev/null 2>/dev/null
The result of the command can be defined in the form of a%> output/dev/null represents an empty device file
Where does the > delegate redirect to, for example: echo
Today in one of their technical group was asked such a question, and then the popular explanation, make a record, we see whether the explanation is clear!
The shell may often see: >/dev/null 2>1
The results of the command can be defined in% > to define the output
Decompose this combination: ">/dev/null 2>1" is part of five.
Where 1:> represent redirects, such as echo "123" >/home/123.txt
2:/
/dev/null : Represents an empty device file> : Where does the delegate redirect to, for example: echo "123" >/home/123.txt1 : Indicates stdout standard output, system default is 1, so ">/dev/null" is equivalent to "1>/dev/null"2 : indicates stderr standard error : Means equal to, 2>1, 2 output redirect equals 11. Prohibit standard output>/
Dev-CPP/mingw32 Environment Introduction (3)
Review above:
The above Dev-CPP/mingw32 Environment Introduction (2) introduces some Dev-CPP functions, including package installation and some minor functions. Hope you will be satisfied. This time, we will continue to introduce other features of Dev-CPP. Actually, tell the
Document directory
1. Set program breakpoint
2. Run the program
3. One-step execution Program
4. Set the watch window
1. Full indent
2. Description of the inserted Program
The following articles are copied to facilitate viewing.
This article was accidentally discovered on the Internet. I wrote it a long time ago. DEV C ++ has already developed a new version, but this article is sufficient for most people. The advantage of using
Webpack-dev-server Plug-inWebpack-dev-server is a small Express server that is officially provided by Webpack. Use it to provide a Web service for the resource files generated by the Webpack package.Webpack-dev-server provides two main functions:
Service for static files
Auto Refresh and Hot swap (HMR)
Hotmodulereplacementplugin Plug-inHotmodule
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