My Scribbles | Bash script for checking telnet service status

Bash script for checking telnet service status


cat monitor.sh 
#!/bin/bash
source /etc/profile
cd /home/koala/Vagrant/windows-server-2019
(echo > /dev/tcp/192.168.178.220/23) > /dev/null 2>&1
if [ $? -ne 0 ]; then
  vagrant halt
  vagrant up
fi

Louis said:

apt install netcat

function restart () { pushd /home/koala/Vagrant/windows-server-2019 > /dev/null vagrant halt vagrant up popd }

function check () { until nc -vz -w ; do : ; done restart }

check

11 December 2020

Louis said:

apt install netcat

function restart () {
pushd /home/koala/Vagrant/windows-server-2019 > /dev/null
vagrant halt
vagrant up
popd
}

function check () {
# polling until it's offline
until nc -vz -w <timeout> <ip> <port> ; do : ; done
restart
}

check

11 December 2020

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