UNIX Automatic Logon telnet code setting solution (1)

UNIX systems are used in many enterprises. This is a complex application. Here we will explain how to set up UNIX Automatic Logon telnet. In order to help you understand this part, we have collected some materials and sorted them out. Here we will share with you. Http://www.linuxeden.com/forum/t138058.html ). This is a good example. I will analyze it below.

 
 

  
  
#=========== Autotelnet. sh ==========================
  
  
#! /Bin/bash
  
  
Tmptty = 'tty '# obtain the current tty Value
  
  
Tmptty = 'basename $ tmptty '# Remove the absolute path of tty
  
  
Tmpname = 'whoam' # obtain the username of the currently executed Program
  
  
Ip = "10.22.33.44" # target host address
  
  
Inp1 = "ABC ^ M" # host user name. Note that ^ M must be reinstalled in the UNIX Automatic Logon telnet mode and entered in the following method for use !!
  
  
# Press ctrl and press v. Do not press ctrl, and then press shift and m.
  
  
Inp2 = "ABC ^ M" # host password, note that ^ M is required
  
  
Inp3 = "ls ^ M" # other commands after entry can be replaced by none or ls commands. Note that ^ M is required.
  
  
Inp4 = "pwd ^ M" # command 4, same as above
  
  
#--------------------------
  
  
Inininputfile = in # It is used to import the file pipeline. Do not change it. This value does not matter.
  
  
Outoutputfile = out. log # final exported file
  
  
Rm-fr $ inputfile
  
  
Rm-fr $ outputfile
  
  
Mknod $ inputfile p
  
  
Touch $ outputfile
  
  
 
  
  
# File description 7 for out and 8 for in uses 7 as the input pipeline and 8 as the input
  
  
Exec 7 <> $ outputfile
  
  
Exec 8 <> $ inputfile
  
  
 
  
  
Telnet $ ip <& 8> & 7 &
  
  
 
  
  
Sleep 2; echo $ inp1 >>$ inputfile
  
  
Sleep 2; echo $ inp2 >>$ inputfile
  
  
Sleep 2; echo $ inp3 >>$ inputfile
  
  
# UNIX automatic logon to telnet settings. If there are no other commands, this line and the next line can be removed.
  
  
Sleep 2; echo $ inp4 >>$ inputfile
  
  
 
  
  
Tail-f $ outputfile & force any input/output to be displayed on the screen
  
  
 
  
  
While true # normally, it has already entered the target host. You can enter any command, and all input and output will be recorded.
  
  
Do
  
  
Read str
  
  
If [[$ str = "quit" | $ str = "exit"]
  
  
Then echo $ str >>$ inputfile exit
  
  
Else echo $ str >>$ inputfile
  
  
Fi
  
  
Done
  
  
 
  
  
# UNIX automatically logs on to telnet and exits to automatically kill related processes
  
  
Ps-ef | greptelnet | grep-v grep | grep-v telnetd | grep $ tmptty | grep $ tmpname | awk '{print "kill-9", $2}' | sh
  
  
Ps-ef | grep tail | grep-v grep | grep-v telnetd | grep $ tmptty | grep $ tmpname | awk '{print "kill-9 ", $2} '| sh