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Allow user to set up an SSH tunnel, but nothing else

... On Ubuntu 11.10, I found I could block ssh commands, sent with and without -T, and block scp copying, while allowing port forwarding to go through. Specifically I have a redis-server on "somehost" bound to localhost:6379 that I wish to share securely via ssh tunnels to ...
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What exactly is Python multiprocessing Module's .join() Method Doing?

Learning about Python Multiprocessing (from a PMOTW article ) and would love some clarification on what exactly the join() method is doing. ...
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Django DB Settings 'Improperly Configured' Error

... You can't just fire up Python and check things, Django doesn't know what project you want to work on. You have to do one of these things: Use python manage.py shell Use django-admin.py shell --settings=mysite.settings (or whatever settings module you us...
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Spring MVC: Complex object as GET @RequestParam

Suppose i have a page that lists the objects on a table and i need to put a form to filter the table. The filter is sent as an Ajax GET to an URL like that: http://foo.com/system/controller/action?page=1&prop1=x&prop2=y&prop3=z ...
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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]

...s a more complete version that shows more differences between [ (aka test) and [[. The following table shows that whether a variable is quoted or not, whether you use single or double brackets and whether the variable contains only a space are the things that affect whether using a test with or wit...
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Count number of occurences for each unique value

...ncy? I have the exact same problem, but my table has roughly 20000 entries and I'd like to know how frequent the most common entries are. – Torvon Dec 1 '14 at 16:25 5 ...
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Writing a Python list of lists to a csv file

... Python's built-in CSV module can handle this easily: import csv with open("output.csv", "wb") as f: writer = csv.writer(f) writer.writerows(a) This assumes your list is defined as a, as it is in your question. You can tweak the exact format of the...
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Update value of a nested dictionary of varying depth

...ight general idea, i.e. a recursive solution, but somewhat peculiar coding and at least one bug. I'd recommend, instead: Python 2: import collections def update(d, u): for k, v in u.iteritems(): if isinstance(v, collections.Mapping): d[k] = update(d.get(k, {}), v) ...
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Is there a “goto” statement in bash?

... No, there is not; see §3.2.4 "Compound Commands" in the Bash Reference Manual for information about the control structures that do exist. In particular, note the mention of break and continue, which aren't as flexible as goto, but are more flexible in Bash than in som...
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Pass in an array of Deferreds to $.when()

...nlikely that you'll known in advance how many formal parameters the .then handler will require, that handler would need to process the arguments array in order to retrieve the result of each promise. share | ...