Linux

There is a mail service function inside the Linux system/var/spool/mailCentOS6, 7 The default is to open the mail service-s Specifies the subject of the message-A file_name adding attachments-R Specify the message source-U Specify the purpose of the

In the CentOS system, the core of the Package Manager is RPM:The RPM command line tool used on the backend;The previous section uses the Yum command-line tool or the DNF command-line tool;Pre-section tools for package management:Rhel/centos series

For file compression and decompression in the. tar format it is common to use the same command today for files in. zip format. I was really stupid enough to ignore the suffix format ...1. For tar format filescompression: TAR–ZCVF compressed after

Assume that there are three servers with IP 10.9.1.101, 10.9.1.102, 10.9.1.103, respectively. Modify the Hosts file Modify the Hosts file (vi/etc/hosts) for each of the three servers, respectively,Added in the Hosts file10.9.1.101 node1

A set_uidBefore we modify the user's login password, are operating as an administrator, such as we in the LV account, we usesudo passwd LV reset LV account password, at this time we directly get root permission to ignore the restrictions on file

First, the virtual machine Linux system REDHAT7 change the NIC nameObjective:In the virtual machine REDHAT7 the name of the network card is relatively long by default, more complex, such as eno16777736, eno33554992, eno50332216, inconvenient to

In the morning to work in the subway line, to the company downstairs waiting for the elevator to line up, lunch to line up, after work to pursue a girl also to line up, even on the internet to download a short film of what door to queue, every time

First, tick device concept Introduction1. Data structureIn the kernel, use struct tick_device to abstract the tick device in the system, as follows: struct Tick_device {struct Clock_event_device *evtdev;Enum Tick_device_mode mode;}; As

1. Install the Curl System Package#yum Install-y Curl2. Install Clickhouse repositories#curl-S https://packagecloud.io/install/repositories/altinity/clickhouse/script.rpm.sh |bash3. Query Clickhouse Package#yum list ' clickhouse* 'Loaded

Windows domain name Local resolution file hosts is able to have a domain name on multiple IPs, if there is a problem with IP, can go to resolve to other IPLinux local parsing file/etc/hosts, whether it can also do so. Here's a test.Let's take a look

As we all know, the relay is a small current to control the operation of a large current "automatic switch", in our lives, work everywhere. Now the "smart home" concept, there are many functional modules is actually "intelligent switch", remote

One, sed (Stream EDitor) 1. Introduction to SED definition : The stream editor, which handles rows, also known as the row editor. Two spaces are exposed to the process, one is pattern space and the other is space-preserving pattern Space :

Method one using the SecureCRT tool1. Open our SECURECRT client and click Tool-->create Public Key.2. Key type We choose an asymmetric type of RSA, follow the prompts next.3, the passphrase settings, when connected to the server need to input, after

Real-time Monitoring of tomcat processes and real-time monitoring of tomcat#! /Bin/bash step = 2for (I = 0; I /dev/null y = 'echo $? 'If ["$ y"-ne "0"]; then ps aux | grep webtomcat | grep-v grep>/dev/null if ['echo $? '-Eq "0"]; then ps uax | grep

Nginx Server web request processing mechanism, nginxweb Mechanism I. Detailed explanation of the web Request Processing Mechanism of the nginx Server In terms of the design architecture, nginx servers are different. The difference lies in its

Common linux shutdown and restart commands and linux restart commands1. shutdown Shut down after all services are closed -C: cancel the previous shutdown command. -H: Shutdown -R: restart -K: sends a shutdown reminder to all users, but does not

In vmware linux, after a new disk is added, refresh the disk, scan the SCSI bus again, and add the SCSI device without restarting the VM. [Root @ centos4 scsi_host] # ls Host0 host1 host2 [Root @ centos4 scsi_host] # fdisk-l Disk/dev/sda: 21.5 GB, 21

Summary of basic Linux disk management knowledge (detailed) and basic linux knowledge I. Attaching and detaching storage devices Common operation commands for mounting and detaching storage devices: fdisk-l, df, du, mount, and umount. Fdisk-l

Solution to memory insufficiency in tomcat deployment: tomcat deploymentDue to memory overflow, should I increase the memory in TOMCAT/bin/catalina. sh or TOMCAT/bin/catalina. bat settings? In windows, the batch processing is. bat and. cmd is a file

Install AWStats to analyze Apache logs AWSTAT is a free Apache log file that is a very powerful log analysis tool. After analyzing logs from apache, it displays logs in easy-to-understand graphical format. Awstat is short for advanced Web statistics.