I am getting this grep error in the cron job since I upgrade rkhunter:
Warning: Checking for preload file [ Warning ]
Warning: Found library preload file: /etc/ld.so.preload
grep: write error: Broken pipe
Warning: The following processes are using deleted files:
Warning: Checking for preload file [ Warning ]
Warning: Found library preload file: /etc/ld.so.preload
grep: write error: Broken pipe
Warning: The following processes are using deleted files: