CentOS 7 SSH Login security issue

2018-10-111. SSH Disable root loginModify the SSH configuration file/etc/ssh/sshd_configvim/etc/ssh/Sshd_configpermitrootlogin Yes #去掉前面的 # and change Yes to noRestart SSHSystemctl Restart sshd2. New addition of ordinary users and authorizedCreate

Install Wireshark in centos

The centos release CD contains Wireshark rpm. If the components are not selected during system installation, you can find them from the installation CD. If you can connect to the Internet, yum is the simplest: # Yum install Wireshark # Yum

Centos: The command not found prompt is displayed when ifconfig is run.

When centos runs ifconfig and other commands, the command not found prompt is displayed.Cause: Some paths such as/bin/sbin are not added to environment variables.Try again:CD/etc/sbin ./IfconfgThe result is displayed correctly.Edit/etc/profile and

Solution to invalid centos DNS resolv restart

You cannot directly modify/etc/resolv. conf. You must add the DNS settings in/etc/sysconfig/network-scripts/ifcfg-eth0. Otherwise, after the restart, you must use the eth0 settings without DNS information to restore/etc/resolv. conf to the original

Centos System for ultra-small USB flash drives

Today, I want to use a USB flash drive to install a centos system. After I find it online, I say I want to use a USB flash drive larger than 4 GB. However, I only have a MB memory card, I tried to install red hat5. Try to find boot. ISO, and the

Uninstall JDK under centos

1. log on to centos with the root account 2. view the JDK INSTALLED IN THE SYSTEM [Root @ localhost ~] # Rpm-Qa | grep JDK Jdk-1.6.0_38-fcs3, uninstall JDK [root @ localhost ~] # Rpm-e -- nodeps jdk-1.6.0_22-fcs Parameter Selection: -E, --

Network Configuration for centos 7.5 O & M

Use dhclient to automatically obtain IP addresses [[email protected] ~]# dhclient -r[[email protected] ~]# dhclientvi /etc/ [[email protected] ~]# ip add1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:

Build lnmp environment on centos source code

Preface 1. Prerequisites: Centos Linux release 7.5.1804; Sudo user (root permission required ); 2. components to be installed: Nginx stable version: nginx-1.14.0; Mariadb 10.3.10 stable; PHP 7.2.11 stable; 3. Procedure: Add environment

Centos 7 for Yum Source

Back up the original source Sudo mV/etc/yum. Repos. d/CentOS-Base.repo/etc/yum. Repos. d/CentOS-Base.repo.bkDownload Alibaba Source $ CD/etc/yum. Repos. d $ sudo wget-NC http://mirrors.aliyun.com/repo/Centos-7.repoChange Alibaba Yum source to

How centos uses LVS + keepalive to build clusters

A load balancing cluster is short for a load balance cluster. Common open-source load balancing software include nginx, LVS, haproxy, commercial Hardware load balancing equipment F5, and netscale. Here we will learn LVS in Linux and record it in

SoftEther centos server setup and Client Connection

Start Installation 1. Install and deploy the server CD/usr/local/ Open the path to be installed, which can be customized # wget https://github.com/SoftEther×××/SoftEther×××_Stable/releases/download/v4.28-9669-beta/softether-***server-v4.28-9669-

Virtual Machine virtualbox and centos 7 Installation

1. virtualbox The operating systems on our computer are generally windows. If we want to learn about Linux, we can install a virtual machine on our computer and then install linux on it. Virtual machines can use virtualbox or VMware. We use

Install the GIT server with private key authentication on centos 6.2

A. installer file Sudo Yum install git Python-setuptools CD/OPT Sudo git clone https://github.com/res0nat0r/gitosis.git CD gitosis/ Sudo Python setup. py installB. Add a git user Note: Do not set a password for git users so that they cannot log

Deployment of SVN version control system on centos

SVN, short for subversion, is a commonly used version control system. I will not talk about the advantages of SVN here. I. Here I will briefly introduce how to deploy the SVN version control management system on sentos. 01. Download the Subversion

Mount NTFS hard drive to centos

Centos itself does not support NTFS format, in order to enable centos to support Windows NTFS. Use a ntfs-3g to make it support NTFS mounting. The procedure is as follows: 1. Install ntfs-3g 1. Download the stable version ntfs-3g from

Centos dual-nic bond Test

Environment Description: Physical Machine: win7 flagship edition 64bit VMWare Version: vmwareworkstation 8 Virtual Machine System Version: centos5.5 Network Connection Mode: Host-only   Test Description: Ping the IP address 192.168.64.20 of the

Enable telnet in centos 5.3 Linux

1. The Telnet package is installed by default in centos 5.3.[Root @ zhuliting ~] # Cat/etc/RedHat-releaseCentos release 5.3 (final)[Root @ zhuliting ~] # Rpm-Qa | grep TelnetTelnet-server-0.17-39.el5Telnet-0.17-39.el5If not, run the following

Install the NVIDIA graphics card driver in centos 5.3

1. My video card model is NVIDIA geforce 6100.The downloaded driver is NVIDIA-Linux-x86-195.36.15-pkg1.run, placed under the/usr/softwarw directory, the type of the driver and the downloaded directory can be based on your own specific circumstances.

Input Method in scim-centos

Install scim, an excellent international input method:1. Go to [url] http://centos.karan.org/el4/extras/stable/ I #/rpms/index.html#/url]. 2. Click the s of jump to letter in the upper-right corner, find scim, and download the latest one: (1) scim

Install Nagios in centos

Nagios is an open-source free network monitoring tool that can effectively monitor the status of windows, Linux and UNIX hosts, network settings such as vswitches and routers, and printers. When the system or service status is abnormal, an email or

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