diff options
| -rw-r--r-- | software/debian.page | 3 | ||||
| -rw-r--r-- | software/freebsd-packages.page | 2 | ||||
| -rw-r--r-- | software/haskell.page | 62 | ||||
| -rw-r--r-- | software/server-setup.page | 12 | ||||
| -rw-r--r-- | software/unix-tricks.page | 9 |
5 files changed, 88 insertions, 0 deletions
diff --git a/software/debian.page b/software/debian.page index 0a1ffa5..f4a2468 100644 --- a/software/debian.page +++ b/software/debian.page @@ -43,3 +43,6 @@ Some gotchas from installing debian a few times: ``~/.bashrc``? * For building stuff you want build-essential + + * For the usual system man pages ("Linux Programmer's Manual"), you may need + to install 'manpages-dev' diff --git a/software/freebsd-packages.page b/software/freebsd-packages.page index 1737d42..c7d6153 100644 --- a/software/freebsd-packages.page +++ b/software/freebsd-packages.page @@ -40,6 +40,8 @@ These are the packages I typically install for a workstation; this is after sele e2fsprogs gtkchtheme unison + unrar + ImageMagick The following are large and/or "optional":: diff --git a/software/haskell.page b/software/haskell.page new file mode 100644 index 0000000..8e7d9f8 --- /dev/null +++ b/software/haskell.page @@ -0,0 +1,62 @@ + +Haskell +================== + +Structure +------------ +Haskell programs consist of monads, actions, modules, ??? + +Basic Syntax +--------------- + +A "type declaration": + + main :: IO () + +An action definition. Note that whitespace matters; the block extends to all +lines indented to the same position as the first non-whitespace after the +``do``: + + main = do + stuff1 + stuff2 + +Lists +-------- +Lists in haskell are homogenous: all elements must of the same type. They are +linked lists, so cons-ing on the front is cheap and concatonating on the end +can be expensive. + +Use ++ to concatonate two lists together: + + ['a','b','c'] ++ ['d','e','f'] + +Use : to cons (prepend) a single element: + + 0:[1,2,3,4,5,6] + +Use !! to pull out an element by index (zero indexed): + + ['c','a','t'] !! 1 + +Strings are lists of characters: "baby" is equivalent to ['b','a','b','y'], +which is equivalent to 'b':'a':'b':'y':[]. The empty set is [] and is distinct +from [[]]. + +A couple functions help; 'head' is like 'car' and gives the first element, +'tail' is like 'cdr' and gives everything except the first element, 'last' +gives the last non-empty element, and 'init' gives everything except the +'last'. 'length' gives the number of elements, 'null' is a test to see if this +is the empty list, + +Compilation +------------ +By default the "main" action of the "Main" module is the action that is +executed when a compiled haskell program is run by the operating system; +this means that most haskell programs need to define these components. + +The `ghc` (Glasgow Haskell Compiler) is the most popular. To compile and +execute a simple one file haskell program you will do something like: + + ghc -o hello helloworld.hs + ./hello diff --git a/software/server-setup.page b/software/server-setup.page index b364f7a..0eb03eb 100644 --- a/software/server-setup.page +++ b/software/server-setup.page @@ -54,3 +54,15 @@ File Hierarchy /srv/python/ Standalone python scripts and applications are stored in here (not Django apps). + +Ruby on Rails Deployment +------------------------------ +This method will mess around with nginx. It uses `<http://www.modrails.com> +Phusion Passenger`_ on Ubuntu Server:: + + nano /etc/apt/sources.list # uncomment the 'universes' lines + sudo aptitude update + sudo aptitude install ruby ruby1.8-dev rubygems build-essential libopenssl-ruby libssl-dev zlib1g-dev + sudo aptitude install irb1.8 bzip2 unzip less screen wget curl sysinfo # Optional + sudo gem install passenger + sudo /var/lib/gems/1.8/bin/passenger-install-nginx-module diff --git a/software/unix-tricks.page b/software/unix-tricks.page index 533a174..41bda41 100644 --- a/software/unix-tricks.page +++ b/software/unix-tricks.page @@ -16,3 +16,12 @@ To fork off 10 instances of sleep with incremented lengths, 5 at a time:: $ seq 10 20 | xargs -n 1 -P 5 sleep +Remapping a Keyboard Key to Meta +----------------------------------- +I like having a Meta key (aka "Windows key") for use with system keyboard +shortcuts (change desktop etc), but some laptop keyboards don't have an extra +button. To remap one of the Alt keys, you need to know it's code: on FreeBSD +6.3 it was: ``Alt_R keysum 0xffea keycode 113``. To get the right mapping under +X11, read the directions in ``/usr/X11R6/lib/X11/xkb/README``. To get the right +mapping under the console, edit ``/usr/share/syscons/keymaps/us.iso.kbd`` and +change 'ralt' to 'meta'. |