Linux

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RAID5 's name changed after Linux reboot Use raid , the device path will be changed after each rebootFor example, the original /dev/md0 Rebooting once became /dev/md127This problem can be resolved by using the Modify configuration file.1, Mdadm-ds >

Source: http://blog.csdn.net/jiangheng0535/article/details/10287609Description: Due to the high time requirement of Hadoop cluster, the hosts in the cluster should be synchronized frequently. This document is suitable for Ubuntu, Redhat series.Note:

1, from the type of file can be divided into three kinds,With the ls-l query, the "one" begins with the file, the letter "D" begins with the directory (commonly known as a folder), the letter "L" is the beginning of the connection.2. The remaining 9

Installing SSH1 SSH service contains two components a sshclient/sshserver, ensure both are installed and version consistent, can be found in the ISO-mirrored software package or yum install (Rpm-qa | | grep ssh)Start the SSH service1/etc/init.d/sshd

View status: /etc/init.d/iptables status Close: /etc/init.d/iptables stop Prevents the firewall from starting when the system starts: /sbin/chkconfig --level 2345 iptables off Restart firewall: /etc/init.d/iptables restart

Slowly feel Linux is very fun, the birth of Linux is inevitable, a very legendary history.LinuxComputer mainly in binary units, the current commonly used disk capacity unit is not B, its units converted to 1b=8bit, the other to the size of a

1 solve the Ubuntu12.04 system information in the graphical display "unknown", terminal execution:sudo apt-get install mesa-utilsAfter the restart.2 Remove the Ubuntu shutdown and restart confirmation prompt boxGsettings Set

a shared memory area is a portion of physical memory that is shared by multiple processes. If more than one process maps the region of memory to its own virtual address space, those processes can access the shared memory area directly, allowing

Use jfreechart and linuxjfreechart in linux Use jfreechart to generate images. in windows, there is no problem. In linux, cocould not initialize class org. jfree. chart. JFreeChart JFreeChart cannot be initialized by default in linux. The

Variable array in C Shell, shell variable array Today I was just reading a bit of C Shell Content and found a very interesting thing! Environment variables can be set like arrays! The specific setting syntax is as follows: Set variable = (element1

CentOS6 compilation and load nbd module, centos6nbd Module Today, we suddenly found that the CentOS system does not have the nbd module and can only be reinstalled. The entire compilation process is recorded below: System: CentOS6.5 Kernel: 2.6.32-43

Linux chmod command to modify file and folder permissions attached to an instance, Source: Internet Author: anonymous name time: 05-01 20:46:07 [large, medium, small] In linux, we need to use the linux chmod command to modify the permissions of a

How to Create Fedora 21 Live USB in Windows 8 The Beta version of Fedora 21 has been provided for download, and the Beta version of Fedora 21 has brought some new features. How can we create a Fedora 21 Live USB? There are many methods. We will

Active and passive round robin in Message Processing If you want to avoid wasting CPU cycles, you should call pfring_poll () to perform round robin when you have nothing to do (for example, no packets are waiting for processing, system wakeup is

How to Use xargs commands in Linux Have you ever performed the same operation on multiple files over and over again? If you have, you will surely feel bored and inefficient. Fortunately, there is a simple way to solve this problem by using the xargs

Install JDK and configure environment variables in Linux This section briefly describes how to install JDK and configure environment variables in Linux. JDK: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html Linux 6

Install and use Tmux in CentOS Tmux introduction: Tmux is a substitute for Screen implemented by BSD. Compared with Screen, Tmux is more advanced: it supports Screen splitting and has rich command line parameters, allowing it to flexibly and

On Linux, how can I quickly find a file? I have seen one sentence before: the level of Linux is reflected in the quick file searching ~~~ , Maybe this sentence is actually said. But on Linux, everything is a file, and anything we want to do can be

Common linux commands used to trace hacker attacks 1 The process where filename is running can be obtained. # Pidoffilename 2 You can see the process through the file or tcpudp Protocol # Fuser-ntcpport 3 You can view the file modification time,