Recently I needed to allow Google thru a firewall and started to track down all of Google’s IPs. GHS or Google Hosted Services is comprised of many IP blocks and they are all used for different purposes. In the list below is only the IPv4 blocks and the ranges.
Archive for the ‘Linux / Unix’ Category
During a recent project I found out; that Ubuntu does not have the latest package for Asterisk PBX server. So the only way to get Asterisk 1.8 is to compile it from scratch. So I am going to show you how to compile and install Asterisk 1.8 properly from source.
My first Linux install was actually a BSD install of OpenBSD and I was quite impressed that nothing was installed except for the operating system. I am now minimalist and when installing operating systems this principal works to my advantage. The ideology is: you only install what is needed and nothing more, thus reducing the surface of attack and lowering wasted process time. So I have put a guide together that was inspired by the Linux how to for â€œThe Perfect Setup â€“ Debian Etchâ€. This guide was created with screenshots from VMware. (more…)
When reviewing a UNIX log file, I often feel like Iâ€™m looking for a needle in a haystack. Even after I â€˜grepâ€™ out what Iâ€™m looking for I still canâ€™t find it. I also like to use the â€˜tail â€“fâ€™ command to watch a rolling log, but again the information scrolls too fast and you just canâ€™t find what youâ€™re looking for in the quick moving results. To find the interesting information we will obviously use the â€˜grepâ€™ command, but to identify the results in the information there are a couple of methods.
The â€˜grepâ€™ command will support ANSI colorization and this can be done a number of ways. The first way is to specify the –color or –colour option on the command line. The second way is to export a variable that â€˜grepâ€™ looks at when executed. You will most likey want to add the export lines to your .profile or .bashrc file.