Tag Archives: telnet

Bash script to reboot network devices via telnet

I noticed that some cheap managed network equipment can start working incorrectly in a few days or weeks, so I had an idea to write a reboot script and add it to the cron.

Content of the script:

#!/bin/bash
(
sleep 5
echo "admin"
sleep 5
echo "password"
sleep 5
echo "reboot"
sleep 5
echo "y"
sleep 5
echo "quit"
) | telnet 192.168.1.10

sleep 5 means a pause of 5 seconds after each command, this value is optimal for long thinking equipment. For example, for client switches D-Link DES-3200 pause can be completely removed or set 1.

See also:
Using and configuring CRON

Backup configuration of TP-Link switches

I wrote a script for backup configuration of TP-Link switches.
The script runs on Linux where the TFTP server is running, it is connected via telnet to the switch and the configuration command is sent to the specified TFTP, when the telnet connection is closed, the file is moved to the desired directory, and the last command deletes files longer than 30 days, as more of them I do not need to store.
You can also make a copy of all the files in the cloud every month.
As you can see, before entering a password in the script, you can not pause.

#!/bin/bash
{
echo "PASSWORD";
echo "enable";
echo "PASSWORD";
echo "copy startup-config tftp ip-address 192.168.0.5 filename tplink";
sleep 2;
echo "exit";
sleep 1;
echo "exit";
} | telnet 192.168.0.110

mv /srv/tftp/tplink.cfg /backups/devices/tplink/`date +%Y-%m-%d`_tplink.cfg
find /backups/devices/tplink/ -type f -mtime +30 -exec rm {} \;