ssh remote command execution method and shell script example

-t parameter of ssh

 

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-t      Force pseudo-tty allocation.  This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services.  Multiple -t options force tty allocation, even if ssh has no local tty.  

 

Chinese translation: It is a virtual tty terminal that can provide a remote server. With this parameter, we can enter our own privilege escalation password on the virtual terminal of the remote server. Very safe 
command format

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ssh -t -p $port $user@$ip  'cmd'  

 

sample script

 

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#!/bin/bash   #Variable
  
definition  
ip_array=("192.168.1.1" "192.168.1.2" "192.168.1.3")  
user="test1"  
remote_cmd="/home/test/1.sh" #Execute  
  
locally via ssh Script for remote server  
for ip in ${ip_array[*]}  
do  
    if [ $ip = "192.168.1.1" ]; then  
        port="7777"  
    else  
        port="22"  
    fi  
    ssh -t -p $port $user@ $ip "remote_cmd"  
done  

 

This method is still very convenient. -t virtualizes the terminal of a remote server, which really saves a lot of time when multiple servers are deployed at the same time!