After the post i published some days ago, I had a discussion on linkedin (take a look here).
In a previous post (First 2 things to do if you want to secure your Raspberry Pi on the internet) I showed simple things to do if you want to put your raspberry on the internet, now I want to show two simple things to do if you want to use your Raspberry Pi as your production server, because in this case the reliability of your Raspberry Pi must be as higher as possible.
The uptime value is how long the system has been running.
This value is an important parameter to observe the evolution of your system.
In Raspbian (but the following instructions work fine also on other linux flavours) you can get the uptime in different ways, my favourite ones are the following:
If you connect your "Raspberry Pi", running Raspbian, to the internet it will be exposed to attackers. on the internet
Since Raspbian comes with a preconfigured user (the "pi" user) everyone knows the username and the password to access your system. So first of all you have to change the password. Open a shell, login as pi user and issue the following command:
Extracting columns from a text file is a very common task for system administrators or for scientific engineers, but, sometimes also other people needs to do this task.
Using the bash and awk, this task is a very simple task.
This is a very common task for a sysadmin, but sometimes people forgets how to do this job. Unices provides a large nuber of tools (often distributed under the GNU GPL license) to help sysadmins in their job.
The first time I powered up the Raspberry Pi I attached to it the USB Keyboard, the USB mouse and the 19 inch monitor that I normally use with my PC.
These objects worked fine with the Raspberry, but the problem is the following (money, money, money)