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How do I remove the passphrase for the SSH key without having to create a new key?
...Short answer:
$ ssh-keygen -p
This will then prompt you to enter the keyfile location, the old passphrase, and the new passphrase (which can be left blank to have no passphrase).
If you would like to do it all on one line without prompts do:
$ ssh-keygen -p [-P old_passphrase] [-N new_passphr...
Save image from URL by paperclip
...ay:
require "open-uri"
class User < ActiveRecord::Base
has_attached_file :picture
def picture_from_url(url)
self.picture = open(url)
end
end
Then simply :
user.picture_from_url "http://www.google.com/images/logos/ps_logo2.png"
...
What's the difference between compiled and interpreted language?
...om wikipedia: "Java applications are typically compiled to bytecode (class file) that can run on any Java Virtual Machine (JVM) regardless of computer architecture."
– Personman
Apr 17 '10 at 4:55
...
How to save an image locally using Python whose URL address I already know?
...2
Here is a more straightforward way if all you want to do is save it as a file:
import urllib
urllib.urlretrieve("http://www.digimouth.com/news/media/2011/09/google-logo.jpg", "local-filename.jpg")
The second argument is the local path where the file should be saved.
Python 3
As SergO suggested t...
How do I purge a linux mail box with huge number of emails? [closed]
...
You can simply delete the /var/mail/username file to delete all emails for a specific user. Also, emails that are outgoing but have not yet been sent will be stored in /var/spool/mqueue.
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Using Vim's persistent undo?
...m 7.3 is 'persistent undo', which allows for the undotree to be saved to a file when exiting a buffer.
4 Answers
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python: Change the scripts working directory to the script's own directory
...you can use the os.path functions:
import os
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.chdir(dname)
This takes the filename of your script, converts it to an absolute path, then extracts the directory of that path, then changes into that directory.
...
How to set HTTP headers (for cache-control)?
... 26 Jul 1997 05:00:00 GMT"); // Date in the past
//or, if you DO want a file to cache, use:
header("Cache-Control: max-age=2592000"); //30days (60sec * 60min * 24hours * 30days)
?>
Note that the exact headers used will depend on your needs (and if you need to support HTTP 1.0 and/or HTTP ...
Git: can't undo local changes (error: path … is unmerged)
... did it the wrong way around. You are meant to reset first, to unstage the file, then checkout, to revert local changes.
Try this:
$ git reset foo/bar.txt
$ git checkout foo/bar.txt
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impro...
Jenkins Host key verification failed
...The host key for bitbucket.org will now be added to the ~/.ssh/known_hosts file and you won't get this error in Jenkins anymore.
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