There
are many cases where we need to execute a java command providing specific jars
to the class path, but there are some specific differences while providing jars
on the class path in linux and windows env.
Consider
a scenario where we need to encrypt a password in JBoss As.We use
java
-cp client/jboss-logging-spi.jar;common/lib/jbosssx.jar
org.jboss.resource.security.SecureIdentityLoginModule jagadesh
Encoded
password: 7b228572f1d62ebcdf8592078de921bc
The
above command is executed on a windows env, which is successful. But when we
run the same command on linux systems it fails giving ,
-bash:
/software/jboss/as/5.0/common/lib/jbosssx.jar: cannot execute binary file
It is
unable to execute the binary file.
Solution: the reason for this is, when we provide the class path, we provide them by using a separator ‘;’ on windows env. But the same ‘;’ is used a statement separator in bash shell (or other shells).We cannot use the same ‘;’ separator for the java command in both the env.In order to execute the same command in linux, we need to provide a different separator which linux can understand. We use ‘:’
We
can execute now as,
java
-cp client/jboss-logging-spi.jar:common/lib/jbosssx.jar
org.jboss.resource.security.SecureIdentityLoginModule jagadesh
Encoded
password: 7b228572f1d62ebcdf8592078de921bc
Happy
learning , More To Come
