Linux

Fio is a very good tool for testing iops to stress test and verify hardware, supporting 19 different I/O engines, including: Sync, mmap, Libaio, Posixaio, SG v3, splice, NULL, network, Syslet, Guasi, Solarisaio and so on.FIO Official website: http://

Rstudio Download Address: http://rstudio.org/download/ Before installing the Rstudio tool, you need to install R, shut down and install the R under Linux, for reference: R Language Linux Environment installation instructions http://blog.csdn.net/

Generally we commonly used browsers are based on the visual interface graphics and text combined with the browsing interface effect, such as Firefox, Chrome, opera and so on, but sometimes toss and project needs, in the Linux environment needs to

Linux Web site Selection Foreign http://lwn.net/ http://www.tldp.org/ Https://rhn.redhat.com http://www.justlinux.com/ http://www.linuxtoday.com/ http://www.linuxquestions.org/ http://www.fokus.gmd.de/linux/ http://www.linux-tutorial.info/

Linux zip command Zip-r myfile.zip./*Compresses all files and folders in the current directory into Myfile.zip files, and-R represents all files under a recursive compression subdirectory. 2.unzipUnzip-o-d/home/sunny Myfile.zipExtract the

Each file and directory in a Linux system has access permission to determine who can access and manipulate files and directories in any way. File or directory access is divided into read-only, write-only and executable three kinds. In the case of a

Hardware is not certain to be reliableThe software must be unreliable.People aren't sure they're unreliable.and nature must be reliable. This sheet explains why, how, when to do backups, and how to back up the things that are backed up. The

I. Installing the NTP software 1. Check if the NTP-related package is installed.Rpm-qa | grep NTP 2. Install NTP software.Yum-y Install NTP Two. Parameter explanation Ignore: Turn off all NTP Online Services Nomodify: The client cannot change

Crontab Concept/Introduction The crontab command is used to set instructions that are periodically executed. This command reads the instruction from the standard input device and stores it in a "crontab" file for later reading and execution. Cron

First, installation1. Install JDKthe downloaded JDK file is: Jdk-6u45-linux-x64.bin, performing the following command to install: #./jdk-6u12-linux-i586.bin 2. Install Tomcat: #tar zxvf apache-tomcat-6.0.18.tar.gz #mv

One-click Installation Package Download : Click here to download Installation Instructions 1. This installation package can be installed on all Linux systems in Aliyun, and this installation package contains the following software and versions:

It is well known that Linux does not have a recycle Bin, some people are afraid to delete the wrong things (experienced Linux administrators rarely fan this error), individuals do not recommend the Recycle Bin, but should be to develop personal

To establish a secure Linux server, you first need to understand the meaning of the configuration files that are related to the network service and how to configure them securely in the Linux environment. In a Linux system, TCP/IP networks are

1, list the current system of all logged on user name, note: The same user log on multiple times, only show once. [Root@node2 ~]# who root pts/0 2016-10-08 13:28 (10.106.64.41) root pts/1 2016-10-08 13:44 ( 10.106.64.41) root

A new Linux server is being taken, ready to check for configuration raid.check for a RAID card first: Copy Code code as follows: # Dmesg|grep-i raid Mptsas:ioc0:attaching RAID volume, Channel 1, ID 0

Introduced Kafka is a distributed, partitioned, replicable messaging system. It provides the functionality of a common messaging system, but has its own unique design. What does this unique design look like? Let's first look at a few basic

Using the MD5 function in OpenSSL, the function returns 16 bytes of unsigned char-type data, each byte in a range of 0~255, It is formatted as 16 and is a 32-bit MD5 encoding. Note: One byte is 8 bits, which can represent 2-bit hexadecimal. Use

I learned the command to create files and directories mkdir, today I'm going to learn the commands for deleting files and directories in Linux: RM command. RM is a commonly used command that deletes one or more files or directories in a directory,

In the Linux system, there are often some computing needs, then the following simple comb the next few commonly used calculation commands(1) BC commandThe BC command is a calculator language that supports interactive execution of arbitrary precision.

View File EncodingThere are several ways to view file encodings in Linux:1. The file encoding can be viewed directly in vim: Set fileencodingYou can display the file encoding format.If you just want to see other encoded files or if you want to solve