Installing a Linux system in a virtual machine

Open the virtual machine file and click Next650) this.width=650; "Src=" Http:// -wmp_4-s_278297866.png "style=" Float:none; "title=" 1.png "alt="

Linux free Memory Script

Tag: Free memory script    mysql out of memory    VI!/bin/bash #系统分配的区总量 mem_total= ' free-m |grep mem | awk ' {print $ } ' #当前剩余的free大小 mem_free= ' free-m |grep mem | awk ' {print $4} ' #当前已使用的used大小 mem_used= ' free-m

linux-Piping Pipe

Piping (pipe)In Linux, pipelines are also a kind of file, but more special, we can use the pipe function to create a pipeline, its prototype is declared as follows:# Inlcude intpipe (int fields[2]); tune? Use the pipe function to open up in the

Let the echo command display a colored word in Linux

echo display with color, need to use parameter-EThe format is as follows:Echo-e "\033[word background color; text color m string \033[0m"For example:Echo-e "\033[41;37m Tonyzhang \033[0m"Where 41 of the position represents the background, 37 of the

Linux Mail notifications

Operation and Maintenance department in the monitoring system, all need to have the mail alarm function, but like the past cacti there is no such function.The Mail command from Linux allows you to send messages either internally or externally.How

Linux setup memcached boot up

memcached Boot ModeMethod One:Append the start command to the /etc/rc.d/rc.local file /usr/local/memcached/bin/memcached-u root-d-M 2048-l 11211-p/tmp/ You can also specify no IP, which is native by

Troubleshooting the High CPU utilization of ECS Linux system in Cloud server

Https:// The relevant configuration and instructions in this article have been tested in the CentOS 6.5 64-bit operating system. Other types and versions of the operating

RHEL7--Linux build FTP virtual user

Installing the VSFTPD Package[email protected] ~]# Yum install vsftpd-y[email protected] ~]# Yum install DB4 db4-utilsThe host user who established the VSFTPD service[Email protected] ~]# useradd vir-s/sbin/nologinCreate a log file[Email protected] ~

Linux read-write lock application Example

Transferred from:* Use a read-write lock to implement four threads to read and write an instance of a program, create four new threads, two threads to read data, and two threads to write data. At

Method steps for HP-UX AIX Linux extended LVM

HP-UX:Pre-collection:1) BDF2) Strings/etc/lvmtab3) Lvdisplay [LV name]: lvdisplay/dev/vgs70/lv0144) Vgdisplay [VG]: VGDISPLAY/DEV/VGS70 PE size is the smallest allocation unit5) swlist-l product |grep-i ONLINEJFS: ONLINE-JFS is a tool that can be

Linux Common Command Daquan

System InformationThe processor architecture of the Arch Display machine (1)UNAME-M Display the processor architecture of the machine (2)Uname-r displaying the kernel version in useDMIDECODE-Q Display hardware system

Rookie Linux Road 1->egrep and its regular expressions

Regular Expressions (regexp:regular expression)Regular expressions are divided into two categories:1, the basic regular expression. Basic REGEXP2, extended regular expression. Extened REGEXPBasic Regular Expressions:Character matching. Match any

Linux RPM installation Package information query

Source: has been integrated with the installation of Apache, MySQL, PHP as a sample, we have to explore the installation path and other information to facilitate our management and use.

Linux Background Run command

Source: often encounter such problems, log on to the remote Linux server with TELNET/SSH, run some long-time tasks, the result of the network instability caused by the task Midway failure. How

Linux under jira6.3.3 installation hack

Preface:JIRA is an excellent problem-tracking management software tool developed by the Australian Atlassian Company to track and manage various types of issues, including defects, tasks, requirements, improvements, and more. Jira uses the Java EE

How to modify the Linux system host name

Complete the goal:Modify the host name of the CentOS 7 systemUse the command:Hostnamectl[Email protected] ~]# Hostnamectl--Helphostnamectl [OPTIONS ...] COMMAND ... Query or change system hostname. -H--help Show This Help--version Show package

installation, upgrade and dynamic adding module of Linux Nginx

System based onubuntu server 14.04.4 amd64 Install the first step download and unzip the Nginx compressed packageDownload Nginx from Nginx website, or perform wget direct download on LinuxUnzip the

Small white learn Linux (iii)--File system basic structure

The Linux file system is an inverted single-tree structure with file names that are strictly case-sensitive (Windows systems are case-insensitive). The path is separated by "/" and differs from Windows ' \ '.Here I draw a normal directory structure

CENTOS7 compiling Linux kernel source code

Yesterday compiled a Linux kernel source code, encountered some problems, today I encountered problems and solutions to share to everyone. Hope can help to the people who need it.1) Check if the appropriate package is installed (the "Development

Linux Common Debug commands


1. View TCP connection Statusnetstat -nat |awk  ' {print $6} ' |sort|uniq -c|sort -rn netstat -n  | awk  '/^tcp/ {++s[$NF]}; End {for (A in s)  print a, s[a]} ' netstat -n | awk  '/^tcp/  {++state[$NF]}; end {for (key in state)  print key, "\ T",

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