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What does rake db:test:prepare actually do?
...tions and,
load the test schema
That is, it will look your db/schema.rb file to determine if any migrations that exist in your project that have not been run. Assuming there are no outstanding migrations, it will then empty the database and reload it based on the contents of the db/schema.rb file...
git push to specific branch
... <remote> <branch>. If you look at your remote in .git/config file, you will see an entry [remote "origin"] which specifies url of the repository. So, in the first part of command you will tell Git where to find repository for this project, and then you just specify a branch.
...
Django's SuspiciousOperation Invalid HTTP_HOST header
...
Seems that you have to specify the path to certificate files if you want to catch SSL requests too (even though you just want to discard): server { listen 80 default_server; listen 443; server_name _; ssl_certificate /path/to/file.crt; ssl_certificate_key /path/...
Run task only if host does not belong to a group
...
You can set a control variable in vars files located in group_vars/ or directly in hosts file like this:
[vagrant:vars]
test_var=true
[location-1]
192.168.33.10 hostname=apollo
[location-2]
192.168.33.20 hostname=zeus
[vagrant:children]
location-1
location-2
...
Why does AuthorizeAttribute redirect to the login page for authentication and authorization failures
... all around.
Consider most operating systems - when you attempt to read a file you don't have permission to access, you aren't shown a login screen!
Thankfully, the HTTP specifications were updated (June 2014) to remove the ambiguity.
From "Hyper Text Transport Protocol (HTTP/1.1): Authenticati...
Requests — how to tell if you're getting a 404
...4')
>>> r.raise_for_status()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "requests/models.py", line 664, in raise_for_status
raise http_error
requests.exceptions.HTTPError: 404 Client Error: NOT FOUND
>>> r = requests.get('http://...
Script parameters in Bash
... var1=${!i};
elif [ ${!i} = "-log" ];
then ((i++))
logFile=${!i};
elif [ ${!i} = "-x" ];
then ((i++))
var2=${!i};
elif [ ${!i} = "-p" ];
then ((i++))
var3=${!i};
elif [ ${!i} = "-b" ];
then ((i++))
var4=${!i};
eli...
How do I change bash history completion to complete what's already on the line?
... Ubuntu ships with this useful /usr/share/doc/bash/inputrc.arrows:
# This file controls the behaviour of line input editing for
# programs that use the Gnu Readline library.
#
# Arrow keys in keypad mode
#
"\C-[OD" backward-char
"\C-[OC" forward-char
"\C-[OA" previous-history
"...
Automatically plot different colored lines
...x" at the bottom of this post.
There is a great tool on the MATLAB Central File Exchange to generate any number of visually distinct colors, if you have the Image Processing Toolbox to use it. Read on for details.
The ColorOrder axes property allows MATLAB to automatically cycle through a list ...
Using sed, how do you print the first 'N' characters of a line?
...
colrm x
For example, if you need the first 100 characters:
cat file |colrm 101
It's been around for years and is in most linux's and bsd's (freebsd for sure), usually by default. I can't remember ever having to type apt-get install colrm.
...