what is ssh secure shell

1. Model Physical Layer: converts data into electronic signals that can be transmitted through physical media equivalent to a porter in the post office. The passes the media transfer bits, providing the mechanical and electrical specifications.

Number of TCP protocol ports 0--65535UDP Protocol Port number 0--65535The port within 10,000 is for the system, more than 10,000 of the port for their own programmingCommon ports:1.FTP (File Transfer Protocol): 20 (data transfer) 21 (Login transfer

What is the security comparison between FTP and SSH? Ftp: Http://baike.baidu.com/subview/369/6149695.htmIn the TCP/IP protocol, the FTP standard command TCP port number is 21,port mode with a data port of 20. The task of FTP is to

I. Preparatory workFirst of all make sure that you have SSH installed on your Linux system, and that for Ubuntu systems it is common to install only SSH client, so we need to install SSH server manually:sudo Install Openssh-serverTwo. SSH

Hadoop1.2.1 Installation--single-node mode and single-machine pseudo-distribution modeFirst, Requirements SectionBefore installing Hadoop on Linux, you need to install two programs first:1) JDK 1.6 (or later). Hadoop is a program written in Java,

There are many introductions on how to enable the SSH service in Ubuntu.ArticleBut most of the methods described are not ideal after testing, and remote logon to Ubuntu is not allowed. The reason is that the ssh-Server service is not enabled. The

SSH (Secure Shell protocol) we can manage multiple hosts remotely, and it is safe to say at this time that the data it transmits is encrypted with a secret key, as opposed to telent using clear text.It provides the ability to remotely use the shell

1. TCP: Transmission Control Protocol IP used to detect errors in network transmissions: responsible for interconnection of different networks2. TCP/IP protocol family: HTTP: (Hypetext Transfer Protocol) ARP (Address Resolution Protocol) Ip->mac Dos

OpenSSH is a free, open-source implementation of the SSH (Secure SHell) protocol. The SSH protocol family can be used for remote control, or to transfer files between computers. Traditional ways of doing this, such as Telnet (terminal emulation

Article Title: Linux Security Basics. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 1. SYSTEM

Code management has been using Svn,git's branch management as the best, try it.I. Gitlab INTRODUCTIONGitLab is an open source project for the warehouse management system. Use Git as a code management tool and build on this Web service.Access to

Configure and use telnet in Redhatlinux9-Linux Enterprise Application-Linux server application information. For details, refer to the following section. To configure the Telnet service, follow these steps: 1. Install the telnet package (usually two)

Red Hat Linux # Add a userUseradd Username# Set PasswordPasswd Username# Deleting a userUserdel UsernameUserdel-r username # delete a user and the user's home directory# Modify the incorrect configuration at startupPress e when you select a startup

1. Install SSH. skip this step and click Next. 2. Click SSH Secure Shell client and click quick connect above, HOST: the IP address of the connected Linux instance (Log On As root in Linux, and view the IP address in ifconfig as shown in Figure

** Application Layer ** data BitTorrent: a popular P2P protocol. DNS: domain name system, an Internet core service that maps domain names to IP addresses. DHCP: Dynamic Host Configuration Protocol, LAN protocol, mainly used: (1) automatically assign

From: http://blog.sina.com.cn/s/blog_607dece60100fe0b.html For Linux users in China, it is a problem that the system often displays garbled characters when it needs to display Chinese characters. For some reason, when it needs a system with an

1. When partitioning a hard disk, select: create a custom partition structure to build a partition structure as needed. 2. Hard Disk representation in Linux 1) IDE hard disk, expressed in HD. Hda indicates the first IDE hard disk, hda1

Based on Linux, ESX Server supports the RPM installation package. Enabling SSH and FTP enables remote management and data transmission.1. esx4 ServerBy default, ESX server does not allow root login. In the VMware vsphere Client Management window,

Reprinted from http://songtl.com/2012/04/22/%E4%BB%A3%E7%A0%81%E6%B5%8B%E8%AF%95/ SSH remote logon in Linux Author:Song Date: interval l 22nd, 2012 Remote logon can be performed through telnet or ssh. Because telnet uses plain text transmission,

OpenSSH has been used for a long time, and its key format is its own OpenSSH format. The Public Key Authentication and login method is very simple. The following will be a direct example to illustrate the principles of Google search. There are also