Change hostname in Linux

change hostname on rhel5
#vi /etc/sysconfig/network
hostname:
save and exit
# vi /etc/hosts
edit
save and exit
#service network restart
#service xinetd restart
___________________________________________
++++++++++++++++++++++++++++++++++++++++
========================================

Change hostname in Linux

First you need to find out your hostname, you can do this with

$ hostname

localhost.localdomain

$

Edit /etc/hosts

You need to edit /etc/hosts and add a line for your host name

$ cat /etc/hosts

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1               localhost.localdomain localhost

$

My new server IP is 72.232.196.90, i need to assign it hostname server12.hosthat.com, to do this, i have edited /etc/hosts as follows.

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1               localhost.localdomain localhost

72.232.196.90           server12.hosthat.com server12

Edit /etc/sysconfig/network

First lets see what is in the file

$ cat /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=localhost.localdomain

$

To change servers hostname to server12.hosthat.com, change the file as follows.

$ cat /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=server12.hosthat.com

$

Now you need to reboot the server to change the hostname.

Manually Remove Exchange 2007

Avoid reinstalling the OS so I tried removing exchange manually.

1. Run setup /m:uninstall
2. Stop and disable all the Exchange 2007 services
3. Use Registry Editor (Start->Run->Regedit) to remove these Exchange related registry keys:
• HKLM\SOFTWARE\Microsoft\Exchange
• HKLM\SYSTEM\CurrentControlSet\Services\MSExchange* (all the keys starting with “MSExchange”)
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft Exchange
4. Remove the entire Web Server role (don’t forget to reinstall afterwards as it’s a prerequisite for E2K7!)
5. Remove the Exchange 2007 server from Active Directory. I ended up deleting the entire “Microsoft Exchange” branch from ADSIEdit (Configuration Container > Services > Microsoft Exchange) as my Org only counts one server.
6. Use Windows Explorer to delete:
• C:\Program Files\Microsoft\Exchange Server
• C:\ExchangeSetupLogs
7. Use Windows Installer CleanUp Utility to remove all the exchange related info from the installer database.
8. Remove the security groups created by Exchange setup from AD

Note: Manually removing Exchange 2007 is not supported by Microsoft! Official guidance for removing Exchange 2007 can be found in this TechNet article. 

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