Packages and Binaries:

0trace

Traceroute tool that can run within an existing TCP connection
The package is traceroute tool that can be run within an existing, open TCP connection, therefore bypassing some types of stateful packet filters with ease.

Installed size: 43 KB
How to install: sudo apt install 0trace

0trace.sh

root@kali:~# 0trace.sh -h
Usage: /usr/bin/0trace.sh iface target_ip [ target_port ]

sendprobe

root@kali:~# sendprobe -h
Usage: sendprobe src_ip dst_ip sport dport seq ack

usleep

Suspend execution for microsecond intervals

root@kali:~# man usleep
usleep(3)                   Library Functions Manual                  usleep(3)

NAME
     usleep - suspend execution for microsecond intervals

LIBRARY
     Standard C library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int usleep(useconds_t usec);

 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

     usleep():
         Since glibc 2.12:
             (_XOPEN_SOURCE >= 500) && ! (_POSIX_C_SOURCE >= 200809L)
                 || /* glibc >= 2.19: */ _DEFAULT_SOURCE
                 || /* glibc <= 2.19: */ _BSD_SOURCE
         Before glibc 2.12:
             _BSD_SOURCE || _XOPEN_SOURCE >= 500

DESCRIPTION
     The  usleep()  function  suspends  execution of the calling thread for (at
     least) usec microseconds.  The sleep may be  lengthened  slightly  by  any
     system  activity or by the time spent processing the call or by the granu-
     larity of system timers.

RETURN VALUE
     The usleep() function returns 0 on success.  On  error,  -1  is  returned,
     with errno set to indicate the error.

ERRORS
     EINTR  Interrupted by a signal; see signal(7).

     EINVAL
            usec  is  greater than or equal to 1000000.  (On systems where that
            is considered an error.)

ATTRIBUTES
     For an explanation of the terms used in this section, see attributes(7).
     +----------------------------------------------+---------------+---------+
     | Interface                                    | Attribute     | Value   |
     +----------------------------------------------+---------------+---------+
     | usleep()                                     | Thread safety | MT-Safe |
     +----------------------------------------------+---------------+---------+

STANDARDS
     None.

HISTORY
     4.3BSD,  POSIX.1-2001.   POSIX.1-2001  declares  it  obsolete,  suggesting
     nanosleep(2) instead.  Removed in POSIX.1-2008.

     On  the  original  BSD  implementation, and before glibc 2.2.2, the return
     type of this function is void.  The POSIX version returns int, and this is
     also the prototype used since glibc 2.2.2.

     Only the EINVAL error return is documented by SUSv2 and POSIX.1-2001.

CAVEATS
     The interaction of this function with the SIGALRM signal, and  with  other
     timer  functions  such  as alarm(2), sleep(3), nanosleep(2), setitimer(2),
     timer_create(2), timer_delete(2),  timer_getoverrun(2),  timer_gettime(2),
     timer_settime(2), ualarm(3) is unspecified.

SEE ALSO
     alarm(2),  getitimer(2),  nanosleep(2), select(2), setitimer(2), sleep(3),
     ualarm(3), useconds_t(3type), time(7)

Linux man-pages 6.18               2026-02-08                         usleep(3)