Linux

This period of time sharpening pain determined to learn the development of embedded systems, and then installed a Linux virtual machine, download u-boot ready to patch recompile encountered a tricky problem.That is ARM-LINUX-GCC: command not

Concepts and FeaturesHistory log, historical events: Time, event itself, log level (depending on the criticality of time)System Log service: Syslog has two processes syslogd (System is responsible for user processes), KLOGD (kernel responsible for

Optimized tuning of TCP/IP and kernel parametersThere are many ways to optimize TCP/IP and kernel parameters under Linux, the configuration of parameters can greatly improve the performance of the system, and can also be optimized according to

How to modify the Fstab file in Linux single-user modeAdded a new hard disk, the partition format in the Fstab set the automatic mount, fstab Setup error, resulting in a Linux reboot error and can not log on to the system, so let Linux enable single-

One, the practical xargs commandLocate/Catalog files that end in. conf and file categoriesCommand: # Find/-name *.conf-type F-print | Xargs fileXargs can not only add files to the command, you can also add a lot of other commands, such as a real tar

First, the user account of the increase, delete, change, check1> Add user------UseraddNote: 1, user name should not be a pure number or start with a number2. Change the login shell to/sbin/nologin to prevent users from logging inFormat: useradd

Special Shell variables1. Environment variables:An environment variable is a class of variables that the system itself needs to be created in advance by the LIUNX system.Mainly used for the user's working environment, including (user's host

Today we will introduce the fourth command: mkdir. mkdir (Make directory creates a directory): Creates a directory if the specified directory does not exist. When you create a directory, you are asked to write permissions for the user who created

Environmental information:CentOS Release 6.8tomcat-8.0JDK1.8First, start Tomcat#sh/root/tomcat-8.0/bin/startup.sh#tailf/root/tomcat-8.0/logs/catalina.out --aug- . A: -:31.661INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector

Because all service times on Azure take UTC time. UTC time is 8 times later than Chinese time , how to make changes according to their own needs, the following 2 ways to provide a reference: 1. Modify the /etc/localtime fileThe file that

I. wget file download use wget to download a single file: wget URL to download and save with a different file name: Wget-o wordpress.zip urlwget speed limit download: wget--limit-rate=300k URL using wget breakpoint continuation: wget-c URL using

1 overviewAt work, you need to patch or install the software in your environment. If there are too many machines, it is possible to miss the machine, or the version of some machines is inconsistent. If you can achieve the same deployment, not only

IfconfigPing IP AddressHelp: PING-T IP AddressPING-C Number of IP addressesSize of the Ping-s packageShutdown Restart:Shutdown-h nowRebootClear screen: Clear = = Ctrl + LDelete line Ctrl + u before cursorThe history! Command numberAliasDefinition

1. Find the SVN installation path/svn/repositories/(if you don't know, you can search: Find/-name svn or Ps-ef | grep svn)2, enter the directory of Conf, which contains Authz, passwd, svnserve.conf three files3. Enter passwd and add the SVN account

InstallationI. ApacheInstallationYum Install-y httpdStart/ETC/INIT.D/HTTPD startNote: Apache will prompt for error after booting: Starting httpd:httpd:Could not reliably determine the server's fully qualif domain name, using:: 1 for Ser

1 What is BondThe network card bond is a kind of common technology in the production scene, which is bound by multi-net cards as a logical NIC, which realizes the redundancy, bandwidth expansion and load balance of the local network card. Kernels 2.4

Importing code files to the repo repository My code files are stored in/var/www/html/;The path to the SVN code repository is/application/svndata/repo (the location of the repository we just created);Execute import command: SVN

Design and Implementation of Linux kernel (1)-kernel introduction, This article briefly introduces the basic concepts related to the kernel. Main content: Single Kernel and micro kernel Kernel version number   1. Single Kernel and micro kernel

[GitHub] fatal: unable to access 'HTTP: // github.com/xxx/xxx.git/': Recv failure: Connection reset by peer, Two methods are provided: 1. Solve fatal: unable to connect to github.com problem http://blog.csdn.net/greenqingqingws/article/details/1180

Analysis on the scale-in; 1. Quality control experiment design; dual-End sequence merging; quality control experiment designThis article uses HiSeq2500 PE250, the most popular type of sequencing data, as an example, combined with the current