Tcpdump stop ungracefully
I am looking for a reliable solution to do package capture for test automation.
Right now, tcpdump has been used with the following command.
sudo tcpdump -i ens160 -w filename.pcap -G 60 -W 1
I stop tcpdump with:
kill -s SIGINT <pid>
1 out of 20 time tcpdump fails to exit properly, and the pcap file will be damaged.
Is there any way to make sure tcpdump will exit properly?
networking wireshark tcpdump
asked Dec 12 '18 at 14:55
Krisz
143115
add a comment |
I am looking for a reliable solution to do package capture for test automation.
Right now, tcpdump has been used with the following command.
sudo tcpdump -i ens160 -w filename.pcap -G 60 -W 1
I stop tcpdump with:
kill -s SIGINT <pid>
1 out of 20 time tcpdump fails to exit properly, and the pcap file will be damaged.
Is there any way to make sure tcpdump will exit properly?
networking wireshark tcpdump
asked Dec 12 '18 at 14:55
Krisz
143115
Why not never issue thekillcommand? The tcpdump command will terminate gracefully after a maximum of one minute anyhow, with a complete and not corrupted pcap file.
– Doug Smythies
Dec 12 '18 at 15:45
The time is a secondary defense level only to make sure, tcpdump will be terminated even if someone terminate the test execution. I do not know all the time how long the test will run, only know what is the worst case.
– Krisz
Dec 12 '18 at 16:03
add a comment |
I am looking for a reliable solution to do package capture for test automation.
Right now, tcpdump has been used with the following command.
sudo tcpdump -i ens160 -w filename.pcap -G 60 -W 1
I stop tcpdump with:
kill -s SIGINT <pid>
1 out of 20 time tcpdump fails to exit properly, and the pcap file will be damaged.
Is there any way to make sure tcpdump will exit properly?
networking wireshark tcpdump
asked Dec 12 '18 at 14:55
Krisz
143115
I am looking for a reliable solution to do package capture for test automation.
Right now, tcpdump has been used with the following command.
sudo tcpdump -i ens160 -w filename.pcap -G 60 -W 1
I stop tcpdump with:
kill -s SIGINT <pid>
1 out of 20 time tcpdump fails to exit properly, and the pcap file will be damaged.
Is there any way to make sure tcpdump will exit properly?
networking wireshark tcpdump
networking wireshark tcpdump
asked Dec 12 '18 at 14:55
Krisz
143115
asked Dec 12 '18 at 14:55
Krisz
143115
asked Dec 12 '18 at 14:55
Krisz
143115
asked Dec 12 '18 at 14:55
Krisz
143115
asked Dec 12 '18 at 14:55
Krisz
143115
143115
Why not never issue thekillcommand? The tcpdump command will terminate gracefully after a maximum of one minute anyhow, with a complete and not corrupted pcap file.
– Doug Smythies
Dec 12 '18 at 15:45
The time is a secondary defense level only to make sure, tcpdump will be terminated even if someone terminate the test execution. I do not know all the time how long the test will run, only know what is the worst case.
– Krisz
Dec 12 '18 at 16:03
add a comment |
Why not never issue thekillcommand? The tcpdump command will terminate gracefully after a maximum of one minute anyhow, with a complete and not corrupted pcap file.
– Doug Smythies
Dec 12 '18 at 15:45
The time is a secondary defense level only to make sure, tcpdump will be terminated even if someone terminate the test execution. I do not know all the time how long the test will run, only know what is the worst case.
– Krisz
Dec 12 '18 at 16:03
Why not never issue the
kill command? The tcpdump command will terminate gracefully after a maximum of one minute anyhow, with a complete and not corrupted pcap file.– Doug Smythies
Dec 12 '18 at 15:45
Why not never issue the
kill command? The tcpdump command will terminate gracefully after a maximum of one minute anyhow, with a complete and not corrupted pcap file.– Doug Smythies
Dec 12 '18 at 15:45
The time is a secondary defense level only to make sure, tcpdump will be terminated even if someone terminate the test execution. I do not know all the time how long the test will run, only know what is the worst case.
– Krisz
Dec 12 '18 at 16:03
The time is a secondary defense level only to make sure, tcpdump will be terminated even if someone terminate the test execution. I do not know all the time how long the test will run, only know what is the worst case.
– Krisz
Dec 12 '18 at 16:03
add a comment |
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1100347%2ftcpdump-stop-ungracefully%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Ask Ubuntu!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1100347%2ftcpdump-stop-ungracefully%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Why not never issue the
killcommand? The tcpdump command will terminate gracefully after a maximum of one minute anyhow, with a complete and not corrupted pcap file.– Doug Smythies
Dec 12 '18 at 15:45
The time is a secondary defense level only to make sure, tcpdump will be terminated even if someone terminate the test execution. I do not know all the time how long the test will run, only know what is the worst case.
– Krisz
Dec 12 '18 at 16:03