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How to use sed to remove the last n lines of a file
...states: The application shall ensure that the number option-argument is a positive decimal integer.
– William Pursell
Nov 14 '12 at 15:51
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Convert two lists into a dictionary
... elements. {k:v} or {**mapping} will construct a dict, but that's syntactically quite distinct.
– Dan Lenski
Aug 28 '19 at 16:41
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Why can't a text column have a default value in MySQL?
...hat frustrating, as I want a default value!). Anybody know why this is not allowed?
7 Answers
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...chain Groups+Turn On
An answer here, from Apple:
UPDATE: We have finally been able to reproduce the -34018 error on iOS
8.3. This is the first step in identifying the root cause and then coming up with a fix.
As usual, we can't commit to a release timeframe, but this has
affected man...
How can I run PowerShell with the .NET 4 runtime?
... that will change the .NET framework loaded systemwide, which will in turn allow PowerShell to use .NET 4.0 classes:
reg add hklm\software\microsoft\.netframework /v OnlyUseLatestCLR /t REG_DWORD /d 1
reg add hklm\software\wow6432node\microsoft\.netframework /v OnlyUseLatestCLR /t REG_DWORD /d 1
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Writing outputs to log file and console
...and errors to log file, database connection details, etc ) which redirects all the outputs ( echo messages ) and errors to the log file from the executed script using the following code:
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Is Tomcat running?
...could also use wget to check the health of your tomcat. If you have a diagnostics page with user load etc, you could fetch it periodically and parse it to determine if anything is going wrong.
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How do I avoid the specification of the username and password at every git push?
... #Your home directory
ssh-keygen -t rsa #Press enter for all values
For Windows
(Only works if the commit program is capable of using certificates/private & public ssh keys)
Use Putty Gen to generate a key
Export the key as an open SSH key
Here is a walkthrough on putty ...
Disable browser's back button
... not obliged to do AFAIK) they still provide a way to reload that page (usually after showing a warning dialog). So if you really don't want your users going back to that page, this may be worse, since the request for that page will HAVE to make its way all the way to the origin server. You will n...
How can I update NodeJS and NPM to the next versions?
I just installed Node.js and npm (for additional modules).
47 Answers
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