Linux Errors and Solutions

Error:
Package kit error

Solution
kill the pid in the list

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Error:
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle


GPG key retrieval failed: [Errno 14] Could not open/read file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle

Solution
rpm --import http://oss.oracle.com/ol6/RPM-GPG-KEY-oracle

rpm -q gpg-pubkey-ec551f03-4c2d256a