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Cron job every three days
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Run it every three days...
0 0 */3 * *
How about that?
If you want it to run on specific days of the month, like the 1st, 4th, 7th, etc... then you can just have a conditional in your script that checks for the current day of the month.
if (((date('j') - 1) % 3))
exit();
or...
Installing rmagick on Ubuntu
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As I commented below, worked fine for me just now with just libmagickwand-dev and I didn't need any additional packages. At least for Magick::ImageList.from_blob, Magick::ImageList.resize, and Magick::ImageList.write. Not sure about other methods.
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Copy a table from one database to another in Postgres
...get database:
pg_dump -t table_to_copy source_db | psql target_db
Note: If the other database already has the table set up, you should use the -a flag to import data only, else you may see weird errors like "Out of memory":
pg_dump -a -t my_table my_db | psql target_db
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Setting environment variables on OS X
...en for apps launched via spotlight. So the selected answer is correct for Snow Leopard ;-)
– Louis Jacomet
Jun 9 '10 at 14:54
5
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How do I check two or more conditions in one ?
How do I check two conditions in one <c:if> ? I tried this, but it raises an error:
4 Answers
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About catching ANY exception
...with exceptions and tracking them all down can be a very painful task, and if you miss just one, you have a very very huge painful bug in your system. That being said, it's good to track down as many as you can and handle them appropriately and then have a backup catch all for the ones you miss.
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Why use HttpClient for Synchronous Connection
...tivity, but what I am doing is purely synchronous, so I cannot see any significant benefit over using HttpWebRequest .
5 A...
How do I associate a Vagrant project directory with an existing VirtualBox VM?
... your "Vagrantfile" to track the UUID of your VM. This file will not exist if a VM does not exist. The format of the file is JSON. It looks like this if a single VM exists:
{
"active":{
"default":"02f8b71c-75c6-4f33-a161-0f46a0665ab6"
}
}
default is the name of the default virtual mac...
Tainted canvases may not be exported
...r me
img.src = src;
return img;
}
And in your callback you can now use ctx.drawImage and export it using toDataURL
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How can I restore the MySQL root user’s full privileges?
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If the GRANT ALL doesn't work, try:
Stop mysqld and restart it with the --skip-grant-tables option.
Connect to the mysqld server with just: mysql (i.e. no -p option, and username may not be required).
Issue the following c...