Recently I developed a strange wear pattern on my car’s front passenger side tire (that’s front rightside tire for those driving on the “wrong” side”) – the outer surface of the tire was warn almost completely bald while the inside treat was fresh and meaty. This was rather odd, as I recently had the car re-aligned with zero toe and max negative camber, which comes out to around -1.6 on both sides. Later I found that as a result of this slight adjustment, I had been pushing the car a lot more aggressively while driving to and from work. The downside of this, as I retraced my steps, is that my drive home from work is almost entirely left turns. When coupled with the fact that I had been recently pushing the car very hard on these left turns, it made sense that I had worn out just the outer edge of the tire.
Since the car is AWD, I didn’t have the option of just replacing that one tire as the difference in tread levels can be harmful to the AWD system. Now here comes the difficult task of finding a single Bridgestone Potenza RE-960/AS Pole Position tire in 225/45/17 so it can be shaved down and mounted.
After some searching I came upon the website BestUsedTires.com – but searching for “Potenza 960” yielded the tire in all sizes but the size I needed. Now, since I’m lazy, how would I automate this search and have my computer notify ME instead of having to manually check every day for the tire I needed?
When administering a Linux server, especially when several people share root access (with sudo, don’t give out that root password!) – it’s important to know when other root users are logged in. This is also a simple form of intrusion detection, since as soon as someone logs into the root shell an email will be dispatched out.
This only happens when the .bashrc file is executed; just using the “sudo” command will not trigger this, but “sudo su – ” will. I also used “chattr +i” to the .bashrc file to set the immutable bit, so the file cannot be modified or changed, not even by the root user. On my server, it also sends a text message to my phone as soon as someone logs in as root. The message will show the username that executed the sudo command, and the IP address that the user is remotely logged in from.