Author Archives: Robert

European situation – Special military operation

Posted on 7 April 2022 by Robert

My father was born in 1935. He lived his childhood in Rotterdam. As a 5 year old he expirienced firsthand the invasion of German troops of his beloved city. The expirience of the entire war that followed, hunted him for … Continue reading →

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Laptop battery status

Posted on 7 April 2022 by Robert

Recently the battery of my laptop is play up. It is constantly hungry for a powercord. And this is not the reason why I am using a laptop. The battery health was rapidly declining. So I installed a new laptop … Continue reading →

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lstty: list tty interfaces on linux

Posted on 7 March 2022 by Robert

I found this little script on internet to get a list of all the usb connected devices. Unfortunaltly this script provides too much information for what I need it to do. Original script can be found on : https://unix.stackexchange.com/questions/144029/command-to-determine-ports-of-a-device-like-dev-ttyusb0 Pay … Continue reading →

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Bash: IF shorthand

Posted on 22 February 2022 by Robert

We all know how to make an if then else decision in programming or scripting languages. In bash , and most other languages it is possible to reduce several lines of code to a one-liners. Lets call that short-hand. A … Continue reading →

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Remove SSH host keys from known_hosts file

Posted on 22 June 2021 by Robert

As a nwetwork admin you have to replace hardware because it’s faulty or of old age. After replacing the hardware , you will be warned of a man-in-the-middle attack while gaining access using SSH. Warning looks like: $ ssh some-host … Continue reading →

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Multiple patterns with expect. Handling a SSH login dialog.

Posted on 14 March 2021 by Robert

When automating network tasks, you a can hit a node which you have not logged on earlier. Using SSH you will end up in a dialog where the ssh client wants to add ssh-key to the known key list. You … Continue reading →

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Custom logfile on Juniper

Posted on 4 March 2021 by Robert

Recently I placed a switch for a project. And now I want to see how often the switch is used by wired users. Lets for argument sake asume interface bounce is not handled by the standard log files. Juniper provides … Continue reading →

Posted in Commands, Juniper | 2 Comments

Pre-shared key on Cisco ASA55x0

Posted on 31 October 2018 by Robert

Cisco devices store password crypted when “service password-encryption” is turned on. You should enable this on your network equipment. You want to give imposters a hard time, so this is behavior you want. Last week I found out a astonishing … Continue reading →

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Cisco TCL – ping script.

Posted on 26 October 2018 by Robert

In an earlier blog I wrote about a tiny hello world script.  Now I want to raise the bar a little bit, by creating a ping script. After a quick search on the internet I found a several kinds of … Continue reading →

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Cisco TCL – first steps… Hello world

Posted on 22 October 2018 by Robert

For some time Cisco offers TCL shell on their equipment. This is awesome, because sometimes you need a single command to retrieve information whereas IOS demands you to enter one or more commands. But before we get lots in possibilities … Continue reading →

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