dev

Dev is the initials of the device (device). /dev This directory is very important to all users. Because the directory contains all the external devices used in the Linux system. But here is not the driver for the external device, which is not the same as the Windows,dos operating system. It is actually a port to access these external devices. We can access these external devices very conveniently, and acces

[Translated from mos] When Oracle software is installed, the/dev/null0 file is created ., Mosnull0When Oracle software is installed, the/dev/null0 file is created.Reference Original:File/dev/null0 Is Created After Installation Of Oracle Software (Doc ID 1322550.1)Applicable:Oracle Database-Enterprise Edition-Version 10.2.0.1 and laterInformation in this document

Oracle11g AMM memory management mode is to use devshm, so sometimes modify MEMORY_TARGET or MEMORY_MAX_TARGET will have a ORA-00845 error, in the security Oracle 11g AMM memory management mode is to use/dev/shm, so sometimes modify MEMORY_TARGET or MEMORY_MAX_TARGET will have a ORA-00845 error, in the security In Linux, the following error occurs when Oracle 11.2.0.4 starts an instance:SQL> startup nomount pfile =/u03/app/oracle/11.2.0/db/dbs/ini

Yum Server LVM expansion, the data directory is Yum storage rpm package directory, only 20G, need to add disk expansion to 80G # DF-LH Filesystem Size used Avail use% mounted on /dev/mapper/vg_node5-root 20G 479M 18G 3%/ Tmpfs 935M 0 935M 0%/dev/shm /DEV/SDA1 485M 39M 421M 9%/boot /dev/mapper/vg_node5-data 20G 172M 1

Tags: Linux device targe node detailed strong driver window logUnder Linux, the/dev directory is important and the various devices are below. Here's a brief summary:DEV is the acronym for Devices. /dev This directory is important to all users. Because this directory contains all the external devices used in the Linux system. But this is not the driver for the external device, which is not the same as the Wi

we often df–th check the disk capacity in daily operation, so what is the role of /dev/shm ? $ df-th File system type capacity used available % mount point /dev/sda2 ext3 57G 32G 23G 59%/ /dev/sda5 ext3 476G 341G 111G 76%/var /dev/sda1 ext3 190M 29M 153M 16%/boot /

A gb storage space is shared on the storage and mapped to the Linux system. The environment consists of two nodes. I. Test 1: Mount directly Format with fdisk as follows: [Root @ Rac1 u01] # fdisk-l ...... Disk/dev/SDK: 536.8 GB, 536870912000 bytes 255 heads, 63 sectors/track, 65270 Cylinders Units = cylinders of 16065*512 = 8225280 bytes Device boot start end blocks ID system /Dev/sdk1 1 65270 524281243 +

1. Generate Package.json in the project: Enter NPM init in the project root directory and enter the appropriate information as prompted. (You can also not generate a Package.json file, but Package.json is useful, all suggestions are generated)2. Installing WebpaackA. Installing WEBPACK:NPM install WEBPACK-G in the globalB. Install webpack into the project and write Webpack to Package.json devdependencies: Go to the project root and enter NPM install Webpack--save-

Webpack-dev-server Webpack-dev-server is a small node.js Express server that uses Webpack-dev-middleware to serve the Webpack package, in addition to this alien, It also has a miniature runtime that connects to the server via Sock.js. Let's take a look at the following configuration file (Webpack.config.js) var path = require ("path"); Module.exports = { ent

Excerpt from: http://miaozk2006.blog.163.com/blog/static/3824705820111028183996/First,/dev/shm/Introduction:/dev/shm/is a very useful directory for Linux because it is not on the hard disk, but in memory. Therefore, under Linux, it is not necessary to build RAMDisk, the direct use of/dev/shm/can achieve a good optimization effect.One of the/

This article goes from http://www.kissyu.org/backgroundWe can often find such statements in a shell script >/dev/null 2>1 . Before I did not go into the role of this command, copy replicable, until last week I wrote this order accidentally 2>1 >/dev/null , a little problem, I began to understand the "mystery" behind the order.Shell Redirection IntroductionJust like the program we write, a program handles th

Under Linux, the/dev directory is important and the various devices are below. Here's a brief summary:DEV is the acronym for Devices./dev This directory is important for all users. Because this directory contains all the external devices that are used in Linux systems . But this is not the driver for the external device , This is not the same as the Window,dos operating system . It is actually a port that a

A 500G space is shared on the storage, mapped to the Linux system offering, and the environment is made up of 2 nodes. one. Test one: Direct Mount After the format of Fdisk is as follows: [Root@rac1 u01]# Fdisk-l ...... disk/dev/sdk:536.8 GB, 536870912000 bytes 255 heads, Sectors/track, 65270cylinders Units = Cylinders of 16065 * 8225280bytes Device Boot Start End Blocks Id System /DEV/SDK1 1 65270 5242812

Control terminal (/dev/tty) The console terminal (/dev/ttyn,/dev/console) can be switched using ALT + [F1-F6] keys Virtual terminal (/dev/pts/n) Pseudo Terminal in xwindows Mode Q: What is/dev/console?A:/dev/console refers to

Standard output input device stdinDetailed analysis of Linux shell data redirection (input redirection and output redirection). They correspond to several special file descriptors, FD0,FD1,FD2 (Stdin,stdout,stderr)Such as:[Email protected] shell]$ Cat>teststdinTest#ctrl +d#cat从/dev/stdin get the data and then the standard output, the input to the Teststdin file[email protected] shell]$ cat TeststdinTest[Email protected] shell]$ Cat>teststdinTest#ctrl

The shell can often be seen: >/dev/null 2>1The result of the command can be defined in the form of a%> output/dev/null represents an empty device fileWhere does the > delegate redirect to, for example: echo "123" >/home/123.txt1 means stdout standard output, the system default is 1, so ">/dev/null" is equivalent to "1>/dev