Currently viewing the category: "linux"

How to use CURL to Hit a Web Api Using HTTP Basic Authentication

By On May 30, 2007 · 1 Comment

Curl is a fantastic application.

The most basic use of curl is very straightforward, just put in a web site’s url:

curl http://twitter.com

If you copy and paste the above code, you’ll get the HTML output of twitter’s home page.

In order to demo this, I created a twitter account. You can sign [...]

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Public / private key set up but not working?

By On April 25, 2007 · 1 Comment

When you set up public key authentication, make sure your authorized_keys2 file has the permissions set to 600. If you don’t, it’s likely that you will still be prompted for your password.

chmod 600 authorized_keys*

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Awk does not work as expected with double quotes

By On March 22, 2007 · Leave a Comment

Of course, I felt like an idiot after being completely confused by this for about half an hour.

Consider this:

awk “{print $1}” somefile.txt

This does not work as I had expected. The reason is because the $1 is evaluated within double quotes, (not single quotes). Yes, it’s a [...]

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Using a result set to call stored procedures for ad hoc queries

By On March 9, 2007 · Leave a Comment

Using mysql -e’s feature, combined with awk and xargs, I was able to call an existing stored procedure repeatedly for a resultset. Yes, I could have written another stored procedure to do this, I realize. But I guess I like doing things the hard way. Either that, or this is just less code. Or I [...]

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What caused that load spike?

By On February 13, 2007 · 2 Comments

Every now and then, we find that we will have a sudden increase in the number of apache processes, load average will spike up, and then go back down to normal. In rare cases, we will see the same thing happen, and the load avg spike WAY up, all queries appear locked up, and the [...]

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Public and Private Keys over SSH

By On December 16, 2006 · 2 Comments

I found a very good explanation of how to set up public key authentication over ssh. I’m always looking for it when I need it, and it always takes forever.

http://www.petefreitag.com/item/532.cfm

You can also use ssh-copy-id, I’m not sure what the specifics are behind it, but it seems to be available occasionally (Fedora 6) [...]

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Rsync over SSH

By On September 11, 2006 · 1 Comment

Took me a while before I got on the ball and starting doing this for syncing my web servers docs to my local machine (for backing up). I had previously used Interarchy for this, but I really prefer to use the command line, where I can schedule it via a cron (should all be 1 [...]

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