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How to enable curl, installed Ubuntu LAMP stack?
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From http://buzznol.blogspot.com/2008/12/install-curl-extension-for-php-in.html:
sudo apt-get install php5-curl
After installing libcurl you should restart the web server with one of the following commands,
sudo /etc/init.d/apache2 restart OR sudo s...
Check Whether a User Exists
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You can also check user by id command.
id -u name gives you the id of that user.
if the user doesn't exist, you got command return value ($?)1
And as other answers pointed out: if all you want is just to check if the user exists, use if with id directly, ...
Convert to/from DateTime and Time in Ruby
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How to apply a CSS filter to a background image
... position: fixed and left: 0; right: 0;. The difference in displaying them comes from the z-index values which have been set differently for the elements.
.background-image {
position: fixed;
left: 0;
right: 0;
z-index: 1;
display: block;
background-image: url('https://i.imgur...
jQuery pass more parameters into callback
...behavior differs a lot depending on JS runtime (read browser). Also try to compare the function name shown in stacktrace/breakpoint in Firebug.
– Ihor Kaharlichenko
May 25 '11 at 7:51
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How can I update npm on Windows?
...global package location.
Allows easy upgrades and downgrades.
Officially recommended by the NPM team.
A list of versions matched between NPM and NODE (https://nodejs.org/en/download/releases/) - but you will need to download NODE INSTALLER and run that to update node (https://nodejs.org/en/)
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Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
...erConcat, StringBuilderArrayPush and StringBuilderArrayIndex http://jsperf.com/string-concat-without-sringbuilder/5 Please go there and run tests so we can get a nice sample. Note that I fixed a small bug, so the data for the tests got wiped, I will update the table once there's enough performance d...
Invoking JavaScript code in an iframe from the parent page
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How do you add swap to an EC2 instance?
... number of blocks you want to allocate… you can read the man page of the command for more info: linux.die.net/man/1/dd
– Fábio Batista
May 19 '14 at 22:23
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convert_tz returns null
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I needed to restart the MySQL daemon too before it would come into effect (on Debian).
– Ekster
Jul 17 '14 at 8:50
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