Run journalctl -u ssh.
journalctl -u ssh
Mission 90
Auth log review
Search training SSH activity for accepted and denied attempts.
Security administrationjournalctlgrep
Lesson 90 of 360
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Security administration · 8 minutes
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learner@clairos:/home/learner $
Unix ops lab: type a command, press Enter
Instructions
8 minutes
Click any instruction for the command details, the why, and the common mistake to avoid.
Run grep denied /var/log/auth.log.
grep denied /var/log/auth.log
Run grep accepted /var/log/auth.log.
grep accepted /var/log/auth.log
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Lesson support
What to notice while you play.
Find successful and denied SSH events.
Use journalctl -u ssh and grep accepted or denied.
Security review starts with knowing who got in and who failed.
- Only checking failed attempts.
- Ignoring accepted access.
Reference
Commands in this lesson.
grep [-i] <text> <file>
Find literal text inside a file.
journalctl -u <service>
Read simulated service journal entries.