Linux

Manually creating multiple instances on a Linux platform (oracle11g)http://blog.csdn.net/sunchenglu7/article/details/39676659ORACLE Linux under sqlplus commandHttp://www.cnblogs.com/xiaoL/archive/2012/04/28/2474616.htmlOracle default instance

[Email protected] ~]# forLineinch`Cat/etc/passwd`; Do Echo$line |awk '{print $ "" Strftime ("%y-%m-%d%h:%m:%s", Systime ())}'&&Sleep 2; Doneroot:x:0:0: Root:/root:/bin/bash .- ,- - One: the: onbin:x:1:1: Bin:/bin:/sbin/nologin .- ,- - One:

First, the problem description:Usually we need to check the log files to locate the problem when troubleshooting, some programs may be associated with multiple programs, so you need to open multiple Windows to view the log using TAILF or Tail-f

This paper mainly introduces four kinds of methods to realize shared memory synchronization.Shared memory is the most efficient way to communicate between processes, and processes can read and write directly to memory without requiring any copy of

1.whereisWhereis whowhereiscan only search binaries (-B), man Help file (-m) and source code file (-s)2.locateSo sometimes when you just add a file, it may not be found and requires a command to be executed manually updatedb(This command must be

After installing a new system, some boot-start services need to be shut down in order to simplify the system.The snail uses the basic commands of grep and awk to operate.As a server, the service that needs to be started in the new system is probably

Problem Description:Xshell Login with key authentication to indicate that the selected user key is not registered on the remote hostProblem solving:View Log /var/log/secure, which is basically a permissions issue for the user root

Linux network configuration is basically by modifying several configuration files to achieve, although you can also use Ifconfig to set the IP, with the route to configure the default gateway, with hostname to configure the hostname, but the restart

View Kernel versionLsb_release-aView the number of physical CPUs, cores, and logical CPUs(1) CPUs with the same core ID are Hyper-threading of the same core. (2) A CPU with the same physical ID is a thread or core encapsulated by the same CPU.(3)

Portal: https://www.shiyanlou.com/courses/runningChallenge: Finding FilesLab Environment:User name: ShiyanlouPassword: 76036575Find a File IntroductionThere is a very important file (sources.list) but you forget where it is, you vaguely remember it

Demand:Login to the Linux host via SSH, the host can only execute specific scripts or programs, how to constrain? First configure/ETC/BASH.BASHRC The file will be executed each time the new shell is opened; Add the Execute script or

Hardware interrupts occur frequently, is a very CPU-intensive thing, in multi-core CPU conditions if there is a way to allocate a large number of hardware interrupts to different CPU (core) processing is clearly a good balance of performance. Now

Insmod: Load ModuleParameters:-F does not check that the current kernel version is consistent with the kernel version at the time of module compilation, forcing the module to be loaded.-K Sets the module to dismount automatically.-M output module

1. View system architecture and kernel information1>uname [Options]Common options:-I display System hardware platform-m display host CPU name-N Display node name-O Display Operating system name-p Display System processor architecture-R Displays the

Preparation materials, Windows Ten, Xshell 5/putty, xmanager/xming.1. Open Control Panel, programs and features, left "turn Windows features on or off", Windows subsystem, tick check box2. Windows command line Input bash waiting for download

Which of Windows, Mac, and Linux is more suitable for developers ?, Maclinux I have written this before, and I am afraid it will attract a war of words. During this period, I interviewed a dozen people, and the development level of Mac was

LINUX knowledge sorting and linux knowledge Socket (): Create a Socket Bind (): Bind a socket. Assign a local Protocol address to a socket Listen (): listening socket Connect (): establish a connection with the server. Accept (): receives

Go to the sub-shell Situation Analysis, shell Situation Analysis The sub-shell concept runs through the entire shell, and it is not unknown when writing shell scripts. The so-called sub-shell is to create a new shell environment from the current

HTTP protocol-common HTTP response status code parsing and Protocol response status ParsingCommon HTTP response status code parsing 1XX Informational (Information Status Code) 2XX Success (Success status code) 3XX Redirection (Redirection status

2017201708281_grep .txt, 20170828 grep [70708281_grep .txt-- // Grep is often used to filter display information.# Ps-ef | grep oraagentOracle 13416 1 0 2016? 1-20:48:04/u01/app/11.2.0.4/grid/bin/oraagent. binGrid 17423 1 0 2014? 2-03:32:14/u01/app/1