SSH remote login, and remote copy - Linux

1. ssh client simple to use

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ssh [-p port] user@remote

• user: user name on the remote machine, if not specified, the default is the current user
• remote: remote machine address, can beIP/域名
• port: SSH Server listening port, if not specified, the default value22

prompt:

• Use exitthe log off the current user
• If the Windowssystem can be installed PuTTYor XShellclient software

prompt:

• In total work, SSH server port number is likely 不是22, if this happens you need to use the -poption to specify the correct port number, or can not properly connected to the server

2. scp remote copy command

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scp: secure copy, carried out at a used Linux 远程拷贝文件commands

# 把本地当前目录下的文件 复制到远程 用户目录下的Desktop
# 注意: `:` 后面的路径如果不是绝对路径, 则以用户的home目录作为参照路径
scp -P port fileName user@remote:Desktop
 
# 把远程 home目录下的 Desktop/file 文件 复制到 本地当前目录下的 file
scp -P port user@remote:Desktop/file file

# 加上 -r 选项可以传送文件夹
# 把当前目录下的 demo文件夹 复制到 远程 home目录下的 Desktop
scp -r demo user@remote:Desktop

# 把远程 home目录下的Desktop 复制到当前目录下的 demo 文件夹
scp -r user@remote:Desktop demo

Options	meaning
-r	If the source file is a directory given file, scp will copy recursively all directories and files in the directory, the target file must be a directory name
-P	If the remote SSH server port is not 22, you need to use capital letters -P option to specify a port

example:

$ scp -P 8088 -r [email protected]:data demo

Explained:
-P: specify port
8088: The port number
-r: copy the folder
ClearLight: the User
217.32.211.58:data: Remote address: The current data file in the user directory folder
demo: demo copy to the files in the current directory folder in

3. SSH Advanced Tutorial

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• Free Password
• Configuring an Alias

Tip: For SSH configuration information is stored in the user's home directory .sshdirectory

Password 3.1 free

step:

• Public key configuration
  • Execution ssh-keygento generate SSH keys all the way round to
• Upload the public key to the server
  • Execution ssh-copy-id -p port user@remote, allows remote server to remember our public key

3.2 Configuring an Alias

step:

1. In .sshthe new config file in the folder, and then write the following content

   Host Alias

   HostName ip address / domain name

   User Username

   ​ Port 22

2. At this point, you can use ssh 别名remote login, scpyou can also be used.

   lixiaoyi@T470p:~$ cd .ssh
   lixiaoyi@T470p:~/.ssh$ ls
   id_rsa  id_rsa.pub  known_hosts
   lixiaoyi@T470p:~/.ssh$ touch config
   lixiaoyi@T470p:~/.ssh$ vim config
   lixiaoyi@T470p:~/.ssh$ cat config
   Host clearlight
       HostName www.clearlight.top
       User clearlight
       port 22
   lixiaoyi@T470p:~/.ssh$ ssh clearlight
   Last login: Sun Jan 12 13:10:07 2020 from 106.8.66.188
   
   Welcome to Alibaba Cloud Elastic Compute Service !
   
   [clearlight@iz2ze7n4ftkcqan59957w2z ~]$