Package: linux-base Version: 4.6 Severity: minor File: /usr/bin/perf Observed behavior: $ perf /usr/bin/perf: line 13: exec: perf_5.10: not found Expected behavior: $ perf /usr/bin/perf: line 14: exec: perf_5.10: not found E: linux-perf-5.10 is not installed.