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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » Symbolic link

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mreddington
PostPosted: Tue Nov 28, 2006 7:33 am    Post subject: Symbolic link Reply with quote

Voyager

Joined: 14 Aug 2006
Posts: 78

Hi all,
What does it mean to create a symbolic link to /usr/bin/true

I am trying to install CSD12 on MQ manager 5.3 and i am getting an error saying that Failed to clean System V IPC resources. In order to solve this error, i have to go through some steps as advised by IBM. The IBM site says that i must create a symbolic link to /usr/bin/true and then rename amqiclen. I don't understand what it means by symbolic link or how to create it. Please advise.
Thank you all...
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Gaya3
PostPosted: Tue Nov 28, 2006 7:37 am    Post subject: Reply with quote

Jedi

Joined: 12 Sep 2006
Posts: 2493
Location: Boston, US

Hi

yes, it happens sometimes

Step 1: copy the amqiclen , use cp -p option
Step 2: ln -s /usr/bin/true /opt/mqm/bin/amqiclen
Step 3: Start installing
after the installation it will automatically go off.

This will help you

Thanks and Regards
Gaythri
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mreddington
PostPosted: Tue Nov 28, 2006 7:39 am    Post subject: Thank you Reply with quote

Voyager

Joined: 14 Aug 2006
Posts: 78

Thank you Gayatri for your reply.
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Vitor
PostPosted: Tue Nov 28, 2006 7:40 am    Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

Simplistically:

A symlink is a UNIX construct - a fake directory that points to another location. Like a Windows shortcut but far more sophisticated & useful. Created with the ln command. Many possible options.

Less simplistically:

Ask your UNIX admin to explain it, with diagrams.
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mreddington
PostPosted: Tue Nov 28, 2006 7:45 am    Post subject: Still getting this error Reply with quote

Voyager

Joined: 14 Aug 2006
Posts: 78

I get the following error when i try to create a symbolic link. Please see below:

$ ln -s /usr/bin/true /opt/mqm/bin/amqiclen
ln: cannot create /opt/mqm/bin/amqiclen: File exists


Why is it so? Am i missing something here...
I actually copied the amqiclen from /opt/mqm/bin directory using cp -p command and saved it in /var/mqm (i guess i can copy it anywhere, am i correct?)
then i tried to run the above command and i receive this error...
please advise
thanks
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Gaya3
PostPosted: Tue Nov 28, 2006 7:49 am    Post subject: Reply with quote

Jedi

Joined: 12 Sep 2006
Posts: 2493
Location: Boston, US

Hey

Sorry one option i forgot to add

amqiclen file has to be removed before converting it to a link to /usr/bin/true

Please do the above one and let us know the status

Thanks and Regards
Gayathri
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Gayathri
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Vitor
PostPosted: Tue Nov 28, 2006 7:54 am    Post subject: Re: Still getting this error Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

mreddington wrote:
(i guess i can copy it anywhere, am i correct?)


You just need it somewhere safe in case the installer doesn't put it back for some bizarre reason and you need to copy it back yourself.
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bruce2359
PostPosted: Fri Dec 01, 2006 7:43 am    Post subject: Reply with quote

Guest




Actually, a symbolic link is a file that contains the real path to a file. Think of it as an alias to the real path to a file.
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