Short article about what really happens with RIP timers. I’ve run some tests putting in situation network advertisements for downlinks and how and when timers react.
The different tests are given in the form of timelines, with the action and reaction at the minute planned. Between brackets you’ll find what should have happened if one of the previous actions was not triggered.
The chage command in Linux is used to change the user password expiry information. Indeed, as the administrator, you can control at what frequency users have to change their password. It’s mainly dealing with timers and dates then.
The role of the different chage timers might not be clear for everyone though.
I found it simple to explain them with a timeline, centered around the life of the user password. Around this central timeline, you will find the actions required by the user and the administrator.
What is a File Descriptor? Really, how does it work?
When you don’t have a clear and global comprehension of the Linux system, it’s hard to answer this question. Worse, when you search about File Descriptor on the net, the absolutely only things you’ll find will be either pages about redirections (as if the idea of File Descriptor could be reduced to standard input, output and error) or complicated stuff in C (you can feel my frustration here).
This is the first post of a casual blog about technical stuff I work on. It’ll probably be mainly Linux and Cisco things. It’s intended for you guys – so don’t hesitate to leave comments – but also for me as a repository of experiments and experiences.
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