For Telnet, we can implement it in various ways. Here, we will introduce the implementation method of "autotelnet". For more specific content, please refer to the main text. Hopefully, this will be helpful to everyone.
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### 1. Shell Implementation
File Name: **autotelnet.sh**
Code as follows:
```bash
(sleep 1; echo "root"; sleep 1; echo "123456"; sleep 1; echo "en"; sleep 1; echo "1qazse4"; sleep 1; echo "conf t"; sleep 1;
echo "int fa0/1"; sleep 1; echo "switchport mode multi"; sleep 1; echo "end"; sleep 1; echo "exit") | telnet 10.32.17.10
```
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### 2. Expect Implementation
File Name: **autotelnet.exp**
Code as follows:
```tcl
#!/usr/bin/expect
set timeout 100
set TERM xterm
set SERVER "10.32.17.10"
set USER "root"
set PASSWD "123456"
spawn telnet
expect "telnet> "
send "open $SERVER\r"
expect "Username:"
send "$USER\r"
expect "Password:"
send "$PASSWD\r"
expect "longjiang-zero>"
send "en\r"
expect "Password:"
send "$PASSWD\r"
expect "longjiang-zero#"
send "conf t\r"
expect "longjiang-zero(config)#"
send "int fa0/1\r"
expect "longjiang-zero(config-if)#"
send "switchport mode multi\r"
expect "longjiang-zero(config-if)#"
send "end\r"
expect "longjiang-zero#"
send "exit\r"
interact
```
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### 3. Python Implementation
File Name: **autotelnet.py**
Code as follows:
```python
#!/usr/bin/python
import telnetlib
host = '10.32.17.10'
user = 'root'
password = '123456'
commands = ['en', password, 'conf t', 'int fa0/1', 'switchport mode multi', 'end']
tn = telnetlib.Telnet(host)
tn.read_until("Username:")
tn.write(user + "\n")
tn.read_until("Password:")
tn.write(password + "\n")
for command in commands:
tn.write(command + '\n')
tn.write("exit\n")
print(tn.read_all())
print('Finish!')
```
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### Reference Link:
[Eden Network Technology Column](http://www.edenw.com/tech/net/col/2010-07-20/4820.html)