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