Openfire with Smack disconnects with error : You acknowledged stanzas that we didn’t send

  Problem: After connecting, openfire servers disconnects from Smack client giving an exception as below – Connection XMPPTCPConnection[dhee@dheeyantra.com/bot] (0) closed w ith error org.jivesoftware.smack.XMPPException$StreamErrorException: undefined-condition You can read more about the meaning of this stream error at http://xmpp.org/rfcs/rfc6120 .html#streams-error-conditions <stream:error><undefined-condition xmlns=’urn:ietf:params:xml:ns:xmpp-streams’/><text>You acknowledged stanzas that we didn&apos;t send. Your Ack h: 11, our last stanz a: […]

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Fix : /boot disk has no space ( on Ubuntu)

Problem : /boot disk has no space, thus blocking installation or removal of any package using apt-get Fix : In terminal – cd /boot ls sudo rm -r abi-4.4.0-89-generic abi-4.4.0-92-generic config-4.4.0-89-generic config-4.4.0-92-generic initrd.img-4.4.0-89-generic initrd.img-4.4.0-92-generic System.map-4.4.0-89-generic System.map-4.4.0-92-generic vmlinuz-4.4.0-89-generic vmlinuz-4.4.0-92-generic (From the listed files, remove least two versions of every file)   This command searches of kernel […]

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