Tracy Phillips

sshd: error: Bind to port 22 on 0.0.0.0 failed: Address already in use

Tuesday 16 Dec 2008 by tracphil | No Comments
Filed under: Linux Tags: sshd

Have you ever been sifting through your log files, and seen this little jewel:

Now are we listing on port 22 or not? I know I am logged in via ssh right now, so I know sshd is working correctly. Lets do a little investigation shall we? Lets see what is listing on port 22.

[server][root][~]# netstat -an | grep 22
tcp        0      0 :::22                      :::*                        LISTEN

[server][root][~]# lsof -i | grep 22
sshd        3449     root    3u  IPv6   7505       TCP *:22 (LISTEN)

Ahhhh HA! Just as I suspected, IPv6 is listening on port 22 so IPv4 can’t listen on port 22. Whew. I thought there might be something really serious going on.

Open up /etc/ssh/sshd_config in your favorite text editor and slap this snippet (or uncomment it if it is already there) into it.

ListenAddress 0.0.0.0

If you have this in your sshd_config, make sure that it is commented like so, by putting a hash (#) in front of it.

#ListenAddress ::

That should do it… restart sshd and that should take care of that little error… errrrr I mean jewel :-)

You can also disable IPv6 instead, but that's taking things a little bit far if you ask me.

echo "alias net-pf-10 off" >> /etc/modprobe.conf

If you do disable IPv6, don’t forget to restart your server.

SCALE 7x - Southern California Linux Expo

Sunday 7 Dec 2008 by tracphil | No Comments
Filed under: Linux

Scale 7.x will be February 20th - 22nd, 2009 at the Westin LAX Hotel and tickets are on sale now.

SCALE will co-op with LOPSA to make Linux training available at the Linux Expo. SCALE University will again convene at SCALE 7x!

Introduction to Virtualized Storage
Disaster Recovery: Will you survive?
Internal documentation for SysAdmins
Saving the World with Fedora Directory Server

See you there… Be there or be square.

How to view the contents of a CSR

Sunday 16 Nov 2008 by tracphil | 1 Comment
Filed under: FreeBSD, Linux Tags: csr, ssl

If you generate quite a few CSR’s that are used to generate SSL certificates, you might have the need to view the contents of the CSR itself to see if it has valid information in it.

To do that, save your CSR to a file… I will call mine, hostvelocity.com.www.csr (yeah, I know its long... but if you have ton of certs and csr's lying around, it helps to be able to identify them)

Here is my CSR:

Now to view the contents of it, just issue the following command

[server][root][~]# openssl req -text -noout -in hostvelocity.com.www.csr

and this is the output

Certificate Request:
Data:
Version: 0 (0x0)
Subject: C=US, ST=CA, L=Oceanside, O=Hostvelocity, OU=IT Dept, CN=www.hostvelocity.com
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
RSA Public Key: (1024 bit)
Modulus (1024 bit):
00:b2:c7:18:58:cf:83:73:7a:b2:ad:fd:7b:d7:25:
ea:81:b3:db:5e:20:fd:38:10:5b:8c:07:c3:19:42:
d0:72:c4:82:83:1d:8e:34:5e:ca:68:13:61:4f:2b:
b0:6d:e4:26:0a:31:18:ce:73:77:ec:06:80:6c:eb:
97:32:8a:d3:a7:de:a7:88:07:1f:64:0a:60:fb:e0:
bf:33:54:a5:92:ac:4a:64:02:ee:b0:ae:f1:59:01:
82:66:53:18:0c:75:85:0d:98:8b:d2:54:4f:cb:38:
5a:37:53:45:80:eb:77:46:52:3a:71:b9:d3:8a:66:
11:ac:c3:67:0a:72:b1:1d:51
Exponent: 65537 (0x10001)
Attributes:
a0:00
Signature Algorithm: md5WithRSAEncryption
32:a0:04:24:b2:17:70:5d:19:e2:b8:d7:4a:49:3d:f9:a3:e9:
9f:b4:4c:fb:06:bb:8e:88:59:f7:07:c5:bf:3b:99:a5:de:92:
eb:86:66:14:1e:83:81:a4:c6:f9:d0:7e:b4:e5:0b:96:0b:06:
18:02:b8:5f:49:d1:5b:0a:68:cd:7e:36:84:aa:98:54:78:71:
b9:1d:1c:da:31:dc:a9:e8:89:a2:ed:92:54:a7:9f:eb:0c:68:
35:21:d7:fe:e6:fe:73:af:90:30:09:56:e3:90:f3:cb:24:42:
67:be:3a:67:f9:75:be:ff:9a:4e:8e:85:72:99:ea:d0:fe:ad:
9a:1d

This is a good way to see if your customers have all the valid info required to order an SSL certificate. Things to look for:

C=Country ST=State L=City O=Organization OU=Department CN=Common Name

You can see that I have that info in the output of the CSR above.

List all cron jobs for all users

Thursday 13 Nov 2008 by tracphil | No Comments
Filed under: Linux Tags: cron, cronjobs, Linux, passwd, tips

You need to run this as root:

[server][root][~]# for user in $(cut -f1 -d: /etc/passwd); do crontab -u $user -l; done

that will loop over each user in /etc/passwd listing out their crontab. The crontabs are owned by the respective users so you will not be able to see another user's crontab without doing this as root.

GMail Video Chat: VoIP to the masses

Tuesday 11 Nov 2008 by tracphil | No Comments
Filed under: Technology Tags: google, skype, video, voip

Looks like Google has thrown Skype (Yahoo) a curve ball by introducing video chat.. right inside your browser. All you have to do is download and install a plugin and enable it in your gtalk from within gmail.

Now that is what I call bringing VoIP to the masses.
Chat anyone?

Obama To Be Next President

Tuesday 4 Nov 2008 by tracphil | No Comments
Filed under: Politics Tags: barack obama, john mccain, president

Well there you have it. Barack Obama will be the next president of the United States of America.

Barack Obama Wins in '08

Hopefully we will see the change Senator Obama has talked about for the last 21 months. By change, I mean change in the way that our federally elected officials work at a fundamental level. I think Washington has forgotten "Of the people, by the people" and they think of it more as "Of the party, by the party".

Google breaks OpenID?

Friday 31 Oct 2008 by tracphil | No Comments
Filed under: Technology Tags: authentication, google, identity, microsoft, openid

Is Google breaking OpenID by not adhering to the already established standards?
OpenID

I am glad they are embracing OpenID, the problem I have is how they are going about it. To make OpenID work, everyone needs to be on the same sheet of music. Google's new way is to have you enter your email address instead of your OpenID provider URL.

With that said, I do like the concept of your email provider being your OpenID provider as well, one less thing to remember (not that its hard to remember a URL), and after all OpenID was created to help consolidate the multitude of authentications that you already have to remember.

I am not a big fan of "embrace and extend" when it breaks the system down. If they wish to extend the way OpenID works, there should be a consensus within the OpenID community.

How to speed up OpenOffice.org

Wednesday 29 Oct 2008 by tracphil | No Comments
Filed under: Windows Tags: ooo, openoffice, speed, tips, Windows

Just in case you are using OpenOffice.org (OOo) and are looking for ways to speed it up, here is a tip that makes it open very quickly.

Tools -> Options -> Memory

Under Graphics cache:

Use for OpenOffice.org increase to 64MB "Memory per object" increase to 8MB

then under Java -> Java Options

Unselect Use a Java runtime environment

Close OOo and reopen it. See, how fast she goes now?

Climbing in Southern California

Monday 27 Oct 2008 by tracphil | No Comments
Filed under: Rock Climbing Tags: bouldering, california, film, Rock Climbing, socal

Having moved from Tennessee back in Feb 2008 it took me a couple of months to realize that I was now living in Southern California and that I was in a climbing mecca.

Previously, I had all but given up climbing... I just didn't have the time, or so I thought. I am going to make time this go around.

I was surfing YouTube earlier and came across this video that looks pretty good:

I went bouldering over the Memorial Day weekend and although I didn't get much bouldering in (My tips learned what the term "course granite" really means), I had a great time just being out again.

As my good friend Rob Piper used to say, "Thanks rock!"

What's wrong with what we eat?

Monday 27 Oct 2008 by tracphil | No Comments
Filed under: Big Thoughts Tags: what we eat is killing us

In this fiery and funny TED talk, New York Times food writer Mark Bittman weighs in on what's wrong with the way we eat now (too much meat, too few plants; too much fast food, too little home cooking), and why it's putting the entire planet (and health) at risk.

I thought I was eating better by cutting the beef out of my diet and eating only fish and chicken. Hey Sushi is healthy right?

My wife and I have been trying to incorporate more raw foods into our diet along with milling grains for breads. This is a good read by Michael Pollan that gets you thinking more about big agra and that the FDA has sold us out.

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