One could just as easily say this is AT LEAST a useless use of head and grep because one could replace both with a single POSIX command: awk "NR < 999 && /

One could just as easily say this is AT LEAST a useless use of head and grep because one could replace both with a single POSIX command: awk "NR < 999 && /$WANT/" $LOG | ... ...but such pedantry should only be unleashed on someone pointing out a UUOC.