Delete Linux dependency libraries and enter rescue mode recovery

Simulate the dependency library file being deleted and restored in rescue mode System: CentOS7 1. Delete mv dependency library files Delete/lib64/libc.so.6 [root@centos7 Packages]# which mv alias mv='mv -i' /usr/bin/mv [root@centos7 Packages]# ldd /usr/bin/mv linux-vdso.so.1 => (0x00007ffd51946000) libselinux.so.1 => /lib ...

Posted on Fri, 11 Oct 2019 10:39:52 -0700 by nolos

Java processes pull CPU or load up and quickly locate scripts

Perhaps students will often encounter a Java server in the production environment. Everything is normal when it is released. After a period of time, there will be a phenomenon of high CPU occupancy or high load. The better load or CPU will be higher and higher day by day. The worse situation is random jitter and then return to normal, which br ...

Posted on Thu, 10 Oct 2019 07:16:25 -0700 by sincspecv

Docker Installation Stand-alone Canal

I. Docker Installation slightly Modifying MySQL Configuration 2.1 Modify my.cnf configuration For self-built MySQL, you need to turn on the Binlog write function, configure binlog-format as ROW mode, and configure it in my.cnf as follows log-bin=mysql-bin # Open binlog binlog-format=ROW # Select ROW mode server_id=1 # Configuring MySQL repl ...

Posted on Mon, 07 Oct 2019 15:10:43 -0700 by illzz

Deepin - Install jdk (uninstall openjdk)

Article directory I. Unloading openjdk 1. View the openjdk version 2. Unload openjdk Download jdk1.8 III. Installation of jdk1.8 Method 1. Manual configuration 1. Preparing jdk files 2. Configure `etc/profile'` 3. Make `etc/profile'effective I. Unloading openjdk 1. View the openjdk version ...

Posted on Wed, 02 Oct 2019 02:12:35 -0700 by kankaro

Adding projects to the lnmp environment

Subject requirements Demand Background: Server, run lamp environment, there are many customer projects, each project is a website. Because of the increasing number of customers, each time you add more than one customer, you need to configure the corresponding mysql, ftp and httpd. This kind of work is very repetitive, so it's very appropriate t ...

Posted on Tue, 01 Oct 2019 02:38:12 -0700 by foamypup

Ansible Simple Tutorial

1. Installation method Ubuntu $ sudo apt-get install -y ansible CentOS $ sudo yum install -y ansible MacOS $ brew install ansible Container $ docker pull ansible/ansible 2. Configuration In large-scale configuration management, we need to manage machines of different businesses whose information is stored in the inventory component ...

Posted on Sun, 29 Sep 2019 20:56:19 -0700 by flowingwindrider

Enter editing mode vim command mode vim practice

vim editing mode, vim command mode vim editing mode Using vim filename to enter the interface is a general mode, in which we can view, copy, cut and paste, but can not edit new content, how can we write directly? This requires entering editing mode. There are many keys to enter editing mode from general mode, but different keys enter editing m ...

Posted on Wed, 25 Sep 2019 00:31:40 -0700 by leafface

Operational Weapon: Introduction to WEB Log Analysis Scenarios

Why do you want to analyze Web logs? With the continuous development of Web technology, Web has been applied more and more widely. Nowadays, many enterprises provide services to a website, so the business behavior and security of the website is very important. As the security industry put it, "There are only two kinds of people in the wor ...

Posted on Thu, 19 Sep 2019 20:14:49 -0700 by tomtimms

Analysis of Confluence File Read Vulnerability (CVE-2019-3394)

Author: Badcode@Knows the date of Chuangyu 404 Laboratory: English Version 2019/08/29: https://paper.seebug.org/1026/ Preface Afternoon @fnmsd The master sent me an early warning from Confluence. I saw the patch and reproduced the vulnerability. This article records the emergency process of the vulnerability. Look at the description below. Con ...

Posted on Tue, 03 Sep 2019 02:52:14 -0700 by paruby

Linux Disk Sequential Write, Random Write

Preface Random writing can cause the head to change paths continuously, resulting in a significant reduction in efficiency Sequential write heads rarely need to change lanes or have a short time to change lanes Introduction to fio Several key indicators in fio's output report: slat: refers to the time from I/O submission to actual I/O exec ...

Posted on Thu, 29 Aug 2019 18:53:31 -0700 by EPJS