philfreo's questions -server

philfreo

Asked: 2015-05-12 05:34:32 +0800 CST

EC2 Ubuntu 14.04 instances: running `apt-get update` results in "Hash Sum mismatch"

2

Every time I create a new AWS EC2 instance with Ubuntu 14.04 (using ami-a182b391, as found from here) and then immediately run sudo apt-get -y update, it gives me an error.

Here's the OS info:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

Here's the failing apt command:

$ sudo apt-get -y update
Ign http://us-west-2.ec2.archive.ubuntu.com trusty InRelease
Ign http://us-west-2.ec2.archive.ubuntu.com trusty-updates InRelease
Hit http://us-west-2.ec2.archive.ubuntu.com trusty Release.gpg
Hit http://us-west-2.ec2.archive.ubuntu.com trusty-updates Release.gpg
Hit http://us-west-2.ec2.archive.ubuntu.com trusty Release
Hit http://us-west-2.ec2.archive.ubuntu.com trusty-updates Release             
Get:1 http://us-west-2.ec2.archive.ubuntu.com trusty/main Sources [1,064 kB]   
Get:2 http://us-west-2.ec2.archive.ubuntu.com trusty/universe Sources [6,399 kB]
Ign http://security.ubuntu.com trusty-security InRelease                       
Get:3 http://security.ubuntu.com trusty-security Release.gpg [933 B]           
Get:4 http://security.ubuntu.com trusty-security Release [63.5 kB]             
Hit http://us-west-2.ec2.archive.ubuntu.com trusty/main amd64 Packages         
Hit http://us-west-2.ec2.archive.ubuntu.com trusty/universe amd64 Packages
Hit http://us-west-2.ec2.archive.ubuntu.com trusty/main Translation-en
Hit http://us-west-2.ec2.archive.ubuntu.com trusty/universe Translation-en     
Get:5 http://us-west-2.ec2.archive.ubuntu.com trusty-updates/main Sources [196 kB]
Get:6 http://us-west-2.ec2.archive.ubuntu.com trusty-updates/universe Sources [114 kB]
Hit http://us-west-2.ec2.archive.ubuntu.com trusty-updates/main amd64 Packages 
Hit http://us-west-2.ec2.archive.ubuntu.com trusty-updates/universe amd64 Packages
Hit http://us-west-2.ec2.archive.ubuntu.com trusty-updates/main Translation-en
Hit http://us-west-2.ec2.archive.ubuntu.com trusty-updates/universe Translation-en
Ign http://us-west-2.ec2.archive.ubuntu.com trusty/main Translation-en_US     
Ign http://us-west-2.ec2.archive.ubuntu.com trusty/universe Translation-en_US 
Get:7 http://security.ubuntu.com trusty-security/main Sources [80.3 kB]       
Get:8 http://security.ubuntu.com trusty-security/universe Sources [21.9 kB]  
Get:9 http://security.ubuntu.com trusty-security/main amd64 Packages [267 kB]  
Get:10 http://security.ubuntu.com trusty-security/universe amd64 Packages [101 kB]
Hit http://security.ubuntu.com trusty-security/main Translation-en
Hit http://security.ubuntu.com trusty-security/universe Translation-en    
Fetched 8,308 kB in 4s (1,678 kB/s)               
W: Failed to fetch http://us-west-2.ec2.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/source/Sources  Hash Sum mismatch

W: Failed to fetch http://us-west-2.ec2.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/source/Sources  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.

I've literally done nothing else on the box besides boot it and run this command, and I've tried with multiple instances and it always happens.

I've found a workaround:

$ sudo rm -rf /var/lib/apt/lists/
$ sudo apt-get -y update
Ign http://us-west-2.ec2.archive.ubuntu.com trusty InRelease
Ign http://us-west-2.ec2.archive.ubuntu.com trusty-updates InRelease
Get:1 http://us-west-2.ec2.archive.ubuntu.com trusty Release.gpg [933 B]
Get:2 http://us-west-2.ec2.archive.ubuntu.com trusty-updates Release.gpg [933 B]
...
Get:23 http://security.ubuntu.com trusty-security/main Translation-en [136 kB]
Get:24 http://security.ubuntu.com trusty-security/universe Translation-en [56.8 kB]
Fetched 21.9 MB in 5s (3,724 kB/s)                                 
Reading package lists... Done

But 1) why is this error happening, 2) is this workaround "OK" to do?

philfreo

Asked: 2015-05-08 13:07:12 +0800 CST

How to combine multiple disks to act as one larger one?

1

In EC2 the i2.2xlarge (or i2.4xlarge) instance type come with 2x800 GB SSD (or 4x800 GB SSD) for instance storage.

Is there a way (using RAID?) to make these separate disks be treated as a single larger 1600 GB (or 3200 GB) disk? How? And are there any important reason not to do this?

philfreo

Asked: 2010-12-08 17:34:59 +0800 CST

How do I monitor memcached evictions?

7

How do I monitor memcached to know if / how many evictions are occurring, and how much memory is used/free.

philfreo

Asked: 2010-05-12 13:39:49 +0800 CST

Rewritten URLs with parameter length > 255 don't work

13

I'm using mod_rewrite to rewrite URLs like this:

http://example.com/1,2,3,4/foo/

By doing this in .htaccess:

RewriteEngine On
RewriteRule ^([\d,]+)/foo/$ /foo.php?id=$1 [L,QSA]

It works fine, except for when "1,2,3,4" turns into a string longer than 255 characters, Apache returns a "403 Forbidden".

There is no problem visiting foo.php?id=1,2,3,4 directly, even with a very long id string, however this isn't an option for me.

Is there some Apache or other setting I should tweak?

UPDATE: I turned RewriteLog on with RewriteLogLevel 9. With a short id string, I get several lines in my log file. But when the id string is greater than 255 chars., nothing is logged (seems as though mod_rewrite isn't even executing?).

If you find this question interesting/helpful, please upvote it.

philfreo

Asked: 2010-02-03 06:44:21 +0800 CST

Please explain my VPS's Mail Queue Manager

0

On my VPS in WebHost Manager I have an area called Mail Queue Manager. I frequently have a few messages built up in there that seem to contain viruses and other problems.

What are these messages, exactly? Are they messages that are attempted to be delivered TO my domain? Or are they messages that somehow are attempted to by sent FROM my domain?

I'm worried that somehow my server is insecure and spammers are using it. Does this message confirm or deny this?

Note: I forward my [email protected] to [email protected], and I send mail from Gmail but using my MYDOMAIN.com SMTP servers.

1NbSMG-0005mN-Ul-H
mailnull 47 12
<>
1264915708 0
-ident mailnull
-received_protocol local
-body_linecount 230
-max_received_linelength 80
-allow_unqualified_recipient
-allow_unqualified_sender
-frozen 1264915709
-localerror
XX
1
[email protected]

144P Received: from mailnull by vps.MYDOMAIN.com with local (Exim 4.69)
    id 1NbSMG-0005mN-Ul
    for [email protected]; Sun, 31 Jan 2010 00:28:28 -0500
040  X-Failed-Recipients: [email protected]
029  Auto-Submitted: auto-replied
060F From: Mail Delivery System <[email protected]>
022T To: [email protected]
059  Subject: Mail delivery failed: returning message to sender
049I Message-Id: <[email protected]>
038  Date: Sun, 31 Jan 2010 00:28:28 -0500

1NbSMG-0005mN-Ul-D
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email protected]
    (ultimately generated from [email protected])
    SMTP error from remote mail server after end of data:
    host gmail-smtp-in.l.google.com [209.85.221.42]:
    552-5.7.0 Our system detected an illegal attachment on your message. Please
    552-5.7.0 visit http://mail.google.com/support/bin/answer.py?answer=6590 to
    552 5.7.0 review our attachment guidelines. 8si6597260qyk.56

------ This is a copy of the message, including all the headers. ------

Return-path: <[email protected]>
Received: from dyncable-72-159-38-204.bardstown.com ([72.159.38.204])
    by vps.MYDOMAIN.com with esmtp (Exim 4.69)
    (envelope-from <[email protected]>)
    id 1NbSMF-0005kn-3O
    for [email protected]; Sun, 31 Jan 2010 00:28:27 -0500
Received: from 72.159.38.204 by mail.rowzie.com; Sun, 31 Jan 2010 00:27:12 -0500
Message-ID: <000d01caa236$0a893ba0$6400a8c0@gullyj>
From: "Erma Cornelius" <[email protected]>
To: <[email protected]>
Subject: You've received a postcard
Date: Sun, 31 Jan 2010 00:27:12 -0500
MIME-Version: 1.0
Content-Type: multipart/mixed;
  boundary="----=_NextPart_000_0006_01CAA236.0A893BA0"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.2180
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180

This is a multi-part message in MIME format.

------=_NextPart_000_0006_01CAA236.0A893BA0
Content-Type: text/plain;
    format=flowed;
    charset="Windows-1252";
    reply-type=original
Content-Transfer-Encoding: 7bit

Good day.

Your family member has sent you an ecard

Send free ecards from  with your choice of colors, words and music. 

Your ecard will be available with us for the next 30 days. 

If you wish to keep the ecard longer, you may save it on your computer or take a
print. 

To view your ecard, open zip attached file.

------=_NextPart_000_0006_01CAA236.0A893BA0
Content-Type: application/zip;
    name="ecard.zip"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
    filename="ecard.zip"

(attachment data here)

EC2 Ubuntu 14.04 instances: running `apt-get update` results in "Hash Sum mismatch"

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