1)
On utilise la commande	ncat -u -l -v -p 50000

Ncat: Version 7.94 ( https://nmap.org/ncat )
Ncat: Listening on [::]:50000
Ncat: Listening on 0.0.0.0:50000

sur un autre terminal on utilise la commande ss -lnu

UNCONN     0    0   0.0.0.0:50000   0.0.0.0:*


2)

dd if=/dev/zero of=ft-file.dat bs=1K count=9

9+0 records in
9+0 records out
9216 bytes (9.2 kB, 9.0 KiB) copied, 0.0083619 s, 1.1 MB/s


ls -lh ft-file.dat
-rw-r--r-- 1 solar students23 9.0K Mar 12 14:52 ft-file.dat



II)

1)
which traceroute
which: no traceroute in (/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/opt/android-sdk/platform-tools:/opt/android-sdk/tools:/opt/android-sdk/tools/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl)

which tracepath
/usr/bin/tracepath

cela signifie que tracepath existe et non traceroute

2)
tcpdump -vvv -i eno1 -f "host 172.16.3.198 and not tcp and not udp and not arp" -w tracepath-trace.txt

 tracepath 8.8.8.8

tcpdump -r tracepath-trace.txt

3)
-n permet d'afficher les ip numériques

4)
tcpdump -r tracepath-trace.txt |sed '/UDP.*$/a \\'

a)