Leak is a unix text utility that leaks n lines of stdin to stderr before sending the rest to stdout.
In particular, this is intended when using "grep" use with commands like "df" and "ps" that include a header. By default, leak sends just the first line (the header) to stderr so that you can see it and the remainder to stdout so that grep can chew on it.
Syntax: your_command | leak -n X -c | your_other_commands Options: -n X : ignore X lines (default 1) -c : colorize the stderr lines -v : Display version information
$ps |leak -c |grep bash
PID PPID PGID WINPID TTY UID STIME COMMAND
50992 49132 50992 50944 pty1 1001 15:52:27 /usr/bin/bash
15872 6836 15872 30840 pty0 1001 Oct 30 /usr/bin/bash
42672 15872 49736 42672 pty0 1001 15:56:00 /usr/bin/bash
$df |leak -c | grep cygdrive
Filesystem 1K-blocks Used Available Use% Mounted on
N: 61702208 26518080 35184128 43% /cygdrive/n
C: 487053316 380786512 106266804 79% /cygdrive/c
H: 3906983932 756543076 3150440856 20% /cygdrive/h
M: 5860389884 998796732 4861593152 18% /cygdrive/m
GPLv3
leak for Linux: g++ -o leak leak.cpp
leak for OSX: g++ -o leak leak.cpp