Ethtool - Linux Networking tool

ethtool

See ethtool for the details. Here are a few frequently used ones:

# Get general info and connectivity status

/sbin/ethtool eth0

# Get driver info

/sbin/ethtool -i eth0  

# Get offload info

/sbin/ethtool -k eth0

# Set offload params. Eg. disable tcp and udp checksumming

/sbin/ethtool -K eth0 tx off

# To check checksum status:

tcpdump -vv -n -i eth0

WebLogic - myrealm failed to load exception

For WebLogic myrealm errors like below, the following could be tried:

• Ensure hostname correctly resolves to the IP address in /etc/hosts
• Check you configuration and validate encrypted password by running from the domain folder:
  java -cp <path_to_weblogic.jar> weblogic.security.Encrypt
• If you are using database as the security store, try to run the script at $WLS_HOME\wlserver_10.3\server\lib\rdbms_security_store_oracle.sql on the database logged in as the weblogic user. 

<Error> <Security> <BEA-090870> <The realm "myrealm" failed to be loaded: weblogic.security.service.SecuritySe
rviceException: java.lang.ExceptionInInitializerError.
weblogic.security.service.SecurityServiceException: java.lang.ExceptionInInitializerError
        at weblogic.security.service.CSSWLSDelegateImpl.initializeServiceEngine(CSSWLSDelegateImpl.java:342)
        at weblogic.security.service.CSSWLSDelegateImpl.initialize(CSSWLSDelegateImpl.java:221)
        Truncated. see log file for complete stacktrace
Caused By: java.lang.ExceptionInInitializerError
        at com.octetstring.vde.util.guid.GuidGenerator.nextGuidInBytes(GuidGenerator.java:125)
        at com.octetstring.vde.util.guid.Guid.<init>(Guid.java:84)
        at com.octetstring.vde.backend.standard.BackendStandard.add(BackendStandard.java:379)
        at com.octetstring.vde.backend.BackendHandler.add(BackendHandler.java:460)
        at com.octetstring.vde.util.LDIF.importLDIF(LDIF.java:279)
        Truncated. see log file for complete stacktrace