Nitin Ramamurthy Blog

ssh Host key verification failed

admin — Wed, 20 Jul 2011 01:48:17 +0000

If you get the following error while trying to SSH into a server, the authorization key has probably changed on the server side:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
0d:dc:de:52:23:d0:05:92:0d:48:87:cb:0c:22:94:4a.
Please contact your system administrator.
Add correct host key in /Users/xxx/.ssh/known_hosts to get rid of this message.
Offending key in /Users/xxx/.ssh/known_hosts:67
RSA host key for test.server.com has changed and you have requested strict checking.
Host key verification failed.

To resolve this, you will need to clear the RSA fingerprint of the server on your client machine. The command to do this:

ssh-keygen -R test.server.com

Now, on trying to SSH into the server, your system will prompt you to confirm if you want to add this server’s RSA fingerprint on your client. Once you confirm, you will be able to connect to the server without any problem going forward.

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Resolving JVM related Eclipse IDE crashes and OutOfMemoryErrors on OSX

admin — Tue, 05 Apr 2011 11:14:14 +0000

Eclipse allocates 256 MB of Java heap memory by default. If you encounter frequent Eclipse IDE crashes, you might want to increase the Java heap memory Eclipse uses.

The Java heap memory options reside inside the eclipse.ini file in the Eclipse application bundle.

To access the eclipse.ini file and make modifications to the JVM settings:

Locate the Eclipse application
.
Right-click the Eclipse application and choose “Show Package Contents”
Locate the eclipse.ini file
Change the ‘launcher.XXMaxPermSize’ to a size greater than the default 265m
–launcher.XXMaxPermSize
256m
Save and relaunch Eclipse.

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How to disable startup items in Mac OSX

admin — Fri, 11 Mar 2011 03:15:22 +0000

To add or remove items during startup:

Under “System Preferences”, go into the “Accounts” section.
Select your login account
Under the “Login items” tab, you can now add or remove applications during login.

Fix for Mysql 5.5.8 start issues on MacOS 10.6 Snow Leopard

admin — Sat, 05 Feb 2011 07:54:24 +0000

On installing MySQL 5.5.8 on MacOS 10.6, the MySQL preference pane item does not start MySQL server.

To resolve the issue, the mysql.server file needs to be modified.

Open the mysql.server file
sudo vi /usr/local/mysql/support-files/mysql.server
Locate the basedir and datadir configuration strings:
# If you change base dir, you must also change datadir. These may get
# overwritten by settings in the MySQL configuration files.
basedir=
datadir=
Initialize them to:
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
Save the file.
Now you will be able to start MySQL server from the MySQL preference pane.

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