Linux Security Notices | A few links for Linux security alerts and notices:
CentOS Yum Automatic Updates | How to set CentOS to use automatic updates 1. yum install yum-cron 2. chkconfig yum-cron on 3. /etc/init.d/yum-cron start That’s it! This job will run when regular cron.daily tasks are scheduled to run as specified in /etc/crontab.
Rsync Over SSH | Here is a quick and easy way for transferring files via rsync over ssh. rsync [options] ssh [local source directory] [user@server]:[destination on server] Example: # rsync -avPz /home/bob/workstuff email@example.com:~/ a (recursive, hidden files incl, etc. – the standard rsync option) v verbose P show Progress z compress data during transfer This will make a copy
shellinabox With Apache Authentication Over HTTPS 443 | shellinabox is an amazing web-based SSH client. It is very handy if you are not on a machine with a good terminal app, are filtered to not having port 22 available, or other uses such as a good web based shell to use while on the ChromeOS notebook. This guide shows how to setup and
Cron Only Email Errors | To have your trusty cron job only email errors, simply add this designation to the end of your cron entry: >/dev/null Example: */30 * * * * /usr/local/bin/myscript.pl >/dev/null Optional more geeky details: There are two different kinds of output from any given command. “>” is the same as issuing “1>” which is the non-error
Install Ubuntu Linux on Chrome Cr-48 | Check out this excellent project which has scripted the process of getting Ubuntu onto your CR-48: http://cr-48-ubuntu.googlecode.com If you are up to more hacking, several have taken a leaked standard bios to then flash the CR-48 into a regular laptop.
Quick Hping How-To | hping is an excellent networking tool that can be used to send a crafted packet over a specific port to test firewall settings. In this example, I’ll show you how to do quick firewall port testing using hping3. First, install hping! Ubuntu has the latest hping3: sudo apt-get install hping3 Ok, now let’s send a
Annotate PDF Documents in OS X | How can I edit a PDF document on OS X? FormulatePro is an excellent free and open source app for OS X that lets you annotate, edit, insert graphics, fill out forms, and otherwise manipulate PDF documents. For an example, here is a PDF that comes from OS X. I’ll open it with FormulatePro to