Here’s a bit of sweet proof that what SANRAL is trying to do is not rocket science, and with the right motivation a solution could have been built and implemented by local talent.
RFID based toll plaza system using 8051 microcontroller (AT89C51).
It also opens up opportunity to consider security flaws that could be evident in these tolling systems.
If you’re not sure where to get started with IPv6, here’s where:
How to become a Certified IPv6 Technician – Part One — RobPickering.com.
I found myself unable to activate the crontab for non-root users on the new Exadata server that was recently installed.
$ crontab -e
You (oracle) are not allowed to use this program (crontab)
See crontab(1) for more information
I checked the usual suspects /etc/cron.allow and /etc/cron.deny and they were all configured correctly. I spent a further half hour or so messing around with /etc/security/access and pam_access in cron.
Had Oracle simply disabled cron entirely on their Exadata machine? That would be unusual but not entirely unfeasable. Oracle often do stupid shit like that.
A search through the Oracle knowledgebase eventually turned up a solution as to why users could not use crontab:
The stickysetuid bit was not set on /usr/bin/crontab, so no non-root user could execute the command.
A quick chmod +s /usr/bin/crontab sorted it all out.
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