making IT happen - Latest Comments

Re: Setting up a CentOS repository

Khandakershahi — Thu, 03 May 2012 05:10:47 -0000

I have tested it in VMWare 8 workstation.

First put the dvd in to the cdrom.

Then make a directory like this:

#[root@localhost ~] mkdir
/home/centos6.2

Then mount the cdrom into the directory /home/centos6.2

Type this command:

#[root@localhost ~] mount /dev/cdrom /home/centos6.2

Then the dvd will be mounted as read only.

Then go to the mounted directory and type the following
command for mediaid. We will need it to make repo file.

Type this commands:

#[root@localhost ~] cd /home/centos6.2

#[root@localhost centos6.2
] cat .discinfo

xxxxxxxxxx.xxxxxx

6.2

i386

Please write that number with “xxxxxxxxxx.xxxxxx” into
notepad or somewhere else. We will need it later.

Then go the yum.repos.d directory. Type the followings:

#[root@localhost centos6.2] cd /etc/yum.repos.d/

Then type ls command. You will see three repo files. We need
to rename them. Use the command below to rename them.

[root@localhost yum.repos.d]
ls

[root@localhost
yum.repos.d] mv CentOS-Base.repo CentOS-Base.repo.disabled

[root@localhost yum.repos.d]
mv CentOS-Base.repo CentOS-Debuginfo.repo.disabled

[root@localhost
yum.repos.d] mv CentOS-Base.repo CentOS-Media.repo.disabled

Now we need to create a local repo file. So type the
following command:

[root@localhost
yum.repos.d] vi centos.repo

Now press i from the keyboard for insert text.

Then type the followings:

[Centos6.2]

mediaid=”xxxxxxxxxx.xxxxxx”
{the discinfo will be typed here}

name=Centos6.2

baseurl=file:///home/centos6.2

enabled=1

gpgcheck=0

Press Esc and type
:wq to save the file.

Now we need to go the /etc/yum/pluginconf.d/ directory to
edit the fastestmirror.conf file.

Type the following commands:

[root@localhost
yum.repos.d] cd /etc/yum/pluginconf.d/

[root@localhost pluginconf.d]
ls

[root@localhost
pluginconf.d] vi fastestmirror.conf

Press i from the keyboard to edit the file

And make change under the main section the following.

enabled=1

enabled=0

Press Esc and type :wq for save the file

Now we are almost ready.

To update yum repository type the following commands:

[root@localhost pluginconf.d]
yum clean all

[root@localhost
pluginconf.d] yum update

[root@localhost
pluginconf.d] yum list

To test type the following commands:

[root@localhost
pluginconf.d] yum intall httpd*

It will ask your permission to run :y/n

Type : y

If it run successfully then everything is ok.

Good luck to all.

Re: SMTP error 553, RFC 822, and Barracuda Spam Firewall

Mark Pippin — Fri, 03 Feb 2012 18:27:11 -0000

I also want to thank you for this post. A customer's Barracuda suddenly started blocking all external email or nearly all.

I was nearly at a loss until I found this via Google. I was born 2 yrs after that RFC was released and I have never seen any reference to the requirement of enclosing mail from / rcpt to in <>.

In fact, numerous reference websites with instructions for testing smtp from telnet omit the <>: http://www.yuki-onna.co.uk/ema...

Apparently Gmail and many other mail providers omit the <>. An email from a gmail account getting bounced is why I was looking at the issue to begin with.

Re: SMTP error 553, RFC 822, and Barracuda Spam Firewall

Tom K — Thu, 19 Jan 2012 03:38:50 -0000

Allan,

Glad the site had the info you needed. Thanks for posting the info on disabling RFC822 compliance.

Tom

Re: SMTP error 553, RFC 822, and Barracuda Spam Firewall

Allan — Wed, 18 Jan 2012 19:57:02 -0000

Thanks for posting this. Was trying to figure out why I was getting this error with a new Barracuda and found the answer here :)

FYI if anyone's looking at disabling the RFC822 (it's actually recommended by Barracuda) you can do this from Advanced > Email Protocol > Enforce RFC 821 Compliance

Cheers,
Allan

Re: Setting up a CentOS repository

Pete — Wed, 18 Jan 2012 19:31:53 -0000

Nice configuration, I got it all to work except for the Addons rsync portion for Centos 6 which fails to retrieve any data. Is the path wrong or isn't there anything there?

Re: Setting up a CentOS repository

Tom K — Wed, 28 Dec 2011 16:38:56 -0000

Good catch. I've fixed the path in the mkdir. Thanks!

Re: Setting up a CentOS repository

Byrnejb — Wed, 28 Dec 2011 11:58:30 -0000

Is the script and the directory structure created previous meant to work with each other? The mkdir says '/repo/6/. . .' but the script defines local as /repo/Centos which would make '$rsync $remote $local/$ver/$base/$arch/' expand to '/repo/CentOS/6/. . .' if I am reading things aright. Should one or the other be corrected? or, am I missing something obvious?

Re: Disabling caching on a primary stgpool and deleting the volumes in TSM

Tom K — Wed, 07 Dec 2011 02:42:43 -0000

Hi Mauro,

In this case, I wasn't able to free the space with migration, since the cached data had previously been migrated. Using "move data" on the volume deletes cached data.

I don't believe it's necessary to vary the volume offline, since you are deleting the volume from the storage pool. It certainly couldn't hurt, though. Either way, I always query to verify that the volume is no longer defined; I probably could have included that step in my example. To be ~~paranoid~~ thorough, system utilities like fuser and lsof can be used.

Thanks for the comment!

Re: Disabling caching on a primary stgpool and deleting the volumes in TSM

Mauro_caldeira — Sun, 04 Dec 2011 07:15:48 -0000

just worndering..... why you didn't use migration process instead of "move data". On the other hands, that volume should be marked as offline before you remove it from aix system, right?

Re: Enabling deduplication on a primary storage pool in TSM 6.2

Tom K — Mon, 28 Nov 2011 02:00:13 -0000

Agreed, this is not something I would do or recommend doing with data that did not also exist in another location(s). I've used it in only one situation - to dedupe virtual volumes on a remote server when we word came down that we needed to retain all backups indefinitely, starting immediately. Oh, and additional capacity was not going to be an option anytime soon. The local TSM server had a fair amount of capacity in its tape library, but the remote server only had local storage and was almost full. They lifted the requirement a few weeks later, and let us know a few weeks after that. As you can imagine, it got pretty messy: there's a reason you don't do dedupe on RAID5 with very few spindles!
Thanks for sharing your experiences!

Re: Enabling deduplication on a primary storage pool in TSM 6.2

Not — Mon, 28 Nov 2011 01:18:41 -0000

Gutsy move. Personally, we have experienced data loss due to TSM's deduplication algorithm not being solid enough. We got duplicate hash-id's generated for separate pieces of data. Sure it's rare, but it's already happened to us, so I would never set "DedupRequiresBackup" to "no".
BTW, we are running on TSM 6.2.3, and this problem still applies - IBM have said they are in no hurry to change the product to any other hash that will avoid this problem. Even though TSM does double-hashing to make certain there aren't duplicates created, it's not a guarantee - as we found out the hard way.
Basically you're playing Russian roulette with your data.

Re: Top 10 Reasons to go to Work Every Day

Online contest — Tue, 22 Nov 2011 07:56:39 -0000

Great entry dude!! I
appreciate IT work sector because their have many enjoyment issue beside work boring
and therefore this job can be able to touch any stuff heart easily. Thanks mate
:)

Re: TSM 6.2.3 released

Aaron N Martin — Sun, 13 Nov 2011 03:24:26 -0000

Hi Tom,
This server is experincing hardware problems and still is ... The problems with 6.2 are still very DB2 based and the main issues still go back to design you have to build it in so that server does have extended disk que wait's. I can send you the macro of the tables to run the reorg's from the command line if it's Windows please reboot or you will earn yourself a lot of off-line archiving and backup clean up.

Re: TSM 6.2.3 released

Tom K — Tue, 23 Aug 2011 21:42:37 -0000

Aaron, can you elaborate? Do you have a PMR open?

Re: TSM 6.2.3 released

Aaron N Martin — Tue, 23 Aug 2011 19:50:21 -0000

Don't it does not fix it I have to run it from the db2 command line processer.

Re: Oracle and TSM for Databases: Part 1

H8mmer — Tue, 17 May 2011 08:17:04 -0000

Cool, look forward to reading it Tom.
Many thanks...

Re: Oracle and TSM for Databases: Part 1

Tom K — Thu, 05 May 2011 12:56:22 -0000

Good question! I had written up a draft but lost it somehow. I'll rewrite and post soonish.

Thanks!

Re: Oracle and TSM for Databases: Part 1

H8mmer — Thu, 05 May 2011 04:58:41 -0000

A good informative start but wheres part2?

Re: Chrysler F-bomb Twitterer blames his software

The Director — Sun, 20 Mar 2011 08:30:41 -0000

They had an employee doing that? I thought submitting official Twitter thoughts was relegated to interns along with the rest of the real work.