Understanding the Default Manifest

By -


Understanding the Default Manifest


When you create a JAR file, it automatically receives a default manifest file. There can be only one manifest file in an archive, and it always has the pathname
META-INF/MANIFEST.MF
When you create a JAR file, the default manifest file simply contains the following:
Manifest-Version: 1.0
Created-By: 1.6.0 (Sun Microsystems Inc.)
These lines show that a manifest's entries take the form of "header: value" pairs. The name of a header is separated from its value by a colon. The default manifest conforms to version 1.0 of the manifest specification and was created by the 1.6.0 version of the JDK.
The manifest can also contain information about the other files that are packaged in the archive. Exactly what file information should be recorded in the manifest depends on how you intend to use the JAR file. The default manifest makes no assumptions about what information it should record about other files.
Digest information is not included in the default manifest.

Thanks!!

Comments

Post a Comment

Popular posts from this blog

Kubernetes || Remove Namespace stuck in terminating state after delete

By -
Currently, we are getting some issues while deleting the namespace in Kubernetes(AKS). When we run " kubectl delete ns " command, it got stuck and after sometime, if we abort this it will remain in terminating state forever. Below is the kubernetes version we are using- $ kubectl version Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.0", GitCommit:"ddf47ac13c1a9483ea035a79cd7c10005ff21a6d", GitTreeState:"clean", BuildDate:"2018-12-03T21:04:45Z", GoVersion:"go1.11.2", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.5", GitCommit:"753b2dbc622f5cc417845f0ff8a77f539a4213ea", GitTreeState:"clean", BuildDate:"2018-11-26T14:31:35Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"} Here, we will see how we ...
Read more

How to take JVM Heap Dump using jmap

By -
We have different options for taking a heap dump of running JAVA process and then analyze those dump for any kind for memory leak. Today, We are going to do the same using " jmap " in-built utility provided with JDK. Using this you will get an advantage that you don't need to wait untill our JVM got crashed by using passing " -XX:+HeapDumpOnOutOfMemoryError " parameter to JVM process. We can capture current status using jmap as below: 1.) Find out the jmap location(only if your JAVA_HOME variable not defined)       #locate jmap 2.) After finding jmap location, move to that directory and run jmap to get live thread dump.       #./jmap -dump:live,format=b,file=[file location] [pid] For more details and options run the command with help option as below : # ./jmap -help Usage:     jmap [option] <pid>         (to connect to running process)     jmap [option] ...
Read more

How to reset mongodb rootadmin password ??

By -
Image
Sometimes we have to manage credentials for lots of things and its obvious that we can forget one of them. Here I am going to explain that how we can reset "rootadmin" password for running mongodb replica set. I am not going in details about installation, configuration or functionality detail. Instead, I'll directly jump to actual technical hacking stuff. Along with with we'll also learn some sed tricks that can be handy on many occasions. Things responsible for Authentication/Permissions with in mongodb replica set- security:   keyFile: "/data/mongo3.2/node3/mongo_3.2-keyfile"   authorization: "enabled" keyFile - This is the path to file that stores the shared secret that all MongoDB instances use to authenticate to each other in a sharded cluster or replica set. authorization - This will Enable or disable Role-Based Access Control (RBAC) to govern each user’s access to database resources and operations. By default, this wil...
Read more