$ zsh -c "ps aux | tee >(grep syslog) | awk 'NR == 1'" USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 954 0.0 0.0 30180 476 ? Ssl Sep01 0:02 /sbin/rsyslogd -n -c 5 k 5479 0.0 0.0 4624 784 pts/0 S+ 16:32 0:00 grep syslog $ bash -c "ps aux | tee >(grep syslog) | awk 'NR == 1'" USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND $