pw: pw (view data passing through a pipe) pw: pw: pw stands for Pipe Watch, a utility that continuously reads lines pw: of text from a pipe or pipe-like source, passes them through a FIFO pw: buffer, and maintains a display based on occasionally sampling the pw: contents of the FIFO buffer, with useful features such as triggering pw: and filtering. pw: pw: pw can monitor anything that produces textual output. tail -f pw: /var/logfile, tcpdump, strace, ... pw: