1. A few things about yum:

– yum plugins
– yum update openssl package (heartbleed anyone?)

Info about yum and openssl packages:
yum info yum
yum info openssl

Run yum without plugins:
yum --noplugins

Update openssl package:
yum update openssl

To check that a certain CVE (common vulnerability and exposure) is fixed in the current installation:
rpm -q --changelog openssl | grep CVE-2014-0224

To check openssl version:
openssl version -a

2. vi quick commands:

– insert to start editing
– escape to stop editing
– :x to save and exit (in view mode)
– u to undo (in view mode)

3. SFTP Sublime Text plugin is awesome

And it’s only $20

1. 5 Unix Commands I wish I’d discovered earlier. Ok, mainly talking about xxd…

2. The Birthday problem: in a class of 30 students, probability that today is an anniversary: 8%. Probability that 2 students have the same birthday: 70% http://en.wikipedia.org/wiki/Birthday_attack

3. ColdFusion Developers, switch to Sublime Text! I already did it, years ago.

4. Top 9 IT security certifications. In case you need one.

5. He was asked to crack a program as part of a job interview. Twice 🙂

6. He quit his job. It was the biggest mistake ever…

Photo: istockphoto