How to use wget through proxy

To get wget to use a proxy, you must set up an environment variable before using wget. Type this at the command prompt / console:

For Windows:
set http_proxy=http://proxy.example.com:8080

For Linux/Unix:
export http_proxy="http://proxy.example.com:8080"

Replace proxy.example.com with your actual proxy server.
Replace 8080 with your actual proxy server port.

You can similarly use ftp_proxy to proxy ftp requests. An example on Linux would be:
export ftp_proxy="http://proxy.example.com:8080"

Then you should specify the following option in wget command line to turn the proxy behavior on:
–proxy=on

Alternatively you can use the following to turn it off:
–proxy=off

You can use –proxy-username="user name" –proxy-passwd="password" to set proxy user name and password where required.
Replace user name with your proxy server user name and password with your proxy server password. Another alternative is to specify them in http_proxy / ftp_proxy environment variable as follows:
export http_proxy="http://username:password@proxy.example.com

For more info read the following article: How to use wget through proxy

How to debug ACLs in squid

If ACLs are giving you problems and you don't know why they aren't working, you can use this tip to debug them.
In squid.conf enable debugging for section 33 at level 2. For example:
debug_options ALL,1 33,2
Then restart or reconfigure squid.
From now on, your cache.log should contain a line for every request that explains if it was allowed, or denied, and which ACL was the last one that it matched.
If this does not give you sufficient information to nail down the problem you can also enable detailed debug information on ACL processing
debug_options ALL,1 33,2 28,9
Then restart or reconfigure squid as above.
From now on, your cache.log should contain detailed traces of all access list processing. Be warned that this can be quite some lines per request.

How to install Dell Open Manage Server in vMA appliance

- Login to vMA using vi-admin account
- Enter the follwing commands
sudo bash -l
export dist_base=el
export dist_ver=5
export dist=el5
- Optionally configure a proxy server to use: (assuming our proxy is proxy.mydomain.com listening to port 3128)
export http_proxy="http://proxy.mydomain.com:3128"
export ftp_proxy="http://proxy.mydomain.com:3128"
- Download and run bootstrap.cgi from Dell:
wget http://linux.dell.com/repo/hardware/latest/bootstrap.cgi
sh bootstrap.cgi
- Modify dell repository finding all lines starting with mirrorlist and setting osname=el5, for example:
vi /etc/yum.repos.d/dell-omsa-repository.repo
changed line: mirrorlist=http://…/mirrors.cgi?osname=el5&basearch=…
- Install and start omsa web server:
yum install srvadmin-webserver
sudo service dsm_om_connsvc start
- Open port 1311 in vMA's firewall entering the utility:
system-config-securitylevel-tui
- Try Open Manage Server opening in a browser the address:
https://vma.ipaddress.com:1311
where vma.ipaddress.com is vMA's IP address
- Remember to select Manage Remote Node in web interface and before you login check Ignore certificate warnings in the same page

For more information go to the Dell OM 6.5.1 Linux repository.
You can also read these articles:
http://www.liquidstate.net/2010/12/07/using-dell-openmanage-with-vmware-esxi-4-x/
http://techontip.wordpress.com/2011/07/27/dell-open-manage-server-administrator-for-esxi-4-1/
http://www.md3v.com/dell-openmanage-on-centos-5x

Windows PowerShell help link in Technet

Just open the following link.

How to speed-up the execution of the first PowerCLI cmdlet

Please read the following blog post.

Hyper-V Certificate Will Expire within 30 Days Event log message

Please read the following article to resolve this problem.

USN and USN Rollback

Please read the following articles from Microsoft:
USN and USN Rollback
How to detect and recover from a USN rollback in Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2
Force Domain Controller Removal
Clean Up Server Metadata