Archive for the ‘Linux’ Category
An aircraft company discovered that it was cheaper to fly its planes with less fuel on board. The planes would be lighter and use less fuel and money was saved. On rare occasions however the amount of fuel was insufficient, and the plane would crash. This problem was solved by the engineers of the company [...]
Copying a disk image onto a CF card using Unix dd is a trivial task (unless you make a mistake when specifying the output file (the of= option) — recovery from that kind of mistake can be a bitch. )
dd if=disk.image of=/dev/da0
dd starts copying with a default blocksize of 512 bytes.
Copying a 4 [...]
Martin's GhettoPush, which I talked about recently is being heavily used here. So much, that I've implemented some changes, that Martin has kindly merged back into his master repository.
The two additions I submitted to the code are both very similar — almost identical. They enable us to exclude certain e-mail messages from being Prowl'ed. You [...]
Prowl is a Growl-like client for the iPhone which accepts notifications from your computer (Mac, Windows) using push. UNIX and Linux systems are also supported via a third-party API that you can use to build your own applications. Installing Prowl is easy enough, and doing so in conjunction with Growl is well explained.
In order to [...]
Many of my past hacks, involved systems that needed to know the TCP/IP address of a client workstation, and I've generally used one of two methods for doing so:
a program on the client initiates a HTTP request to a PHP or CGI resource, which records the client's IP address from an environment variable passed to [...]
Not a lot of magic is needed to create a proxy autoconfiguration file (PAC) for use in a Web browser, and there is plenty of reference material on the net. Since I didn't find a cheat-sheet at the time, I thought it would be good to have one, and set about writing one over a [...]
You know grep, don't you? Then try ack — you'll adore it.
ack is a bit like grep: it uses the full power of Perl's regular expressions to find things in files, but ack does "the right thing" usually by default. Consider the following example:
You'll notice colored output, ack looked recursively for the files itself (no [...]
We make heaving use of a Web caching or proxy server for outgoing HTTP requests, and squid is our preferred tool. I implemented squid a number of years ago, and its squid.conf configuration file has historically (or histerically) grown out of reasonable proportions with all manner of access control lists (ACL) strewn throughout. (If you [...]