Last Updated or created 2023-02-14

I’m using a lot of terminals, spawning a new terminal and running ssh, without knowing if i still have a session running.

Lets see:

This was done using something like:

#!/bin/bash
count=$(ps -ef | grep xterm | grep -v grep | wc -l)
timestamp=$(date +%s)
echo "$timestamp,$count" >> /var/local/terminallog 

Later i made a script to push this information in Grafana

Now for the SSH part.
I’m jumping from machine to machine using ssh, sometime i loop back to a server i was already connected to .. this helps me to keep track

in ssh_config add
SendEnv SSHTRAIL

in sshd_config add
AcceptEnv SSHTRAIL

in /etc/profile
export SSHTRAIL=$SSHTRAIL:$HOSTNAME

restart sshd
when you do this on all your machines you can get a trail of ssh using:
echo $SSHTRAIL
workstation:server1:server66:server1

I could change the prompt when a loop is detected
echo $SSHTRAIL | sed -e 's/:/\n/g' | sort | uniq -c | grep -v 1 | ... | echo "WARNING: loop in ssh"