Mdthbs

What does "spinning upon the shoals" mean?

What is the highest level of accuracy in motion control a Victorian society could achieve?

How to have a filled pattern

How do I explain that I don't want to maintain old projects?

My professor has told me he will be the corresponding author. Will it hurt my future career?

Does anyone have a method of differentiating informative comments from commented out code?

Examples of fluid (including air) being used to transmit digital data?

Tesco's Burger Relish Best Before End date number

Sorting a list according to some pre-specified rules

How can I reset Safari when Safari is broken?

How was the website able to tell my credit card was wrong before it processed it?

What is this burst transmission sequence across the entire band?

How can I use my cell phone's light as a reading light?

How to deal with account scam and fraud?

Is this car delivery via Ebay Motors on Craigslist a scam?

Can a wizard use the spell Levitate on a target and shoot him with attacking spells that don't require concentration?

Is it ok for parents to kiss and romance with each other while their 2- to 8-year-old child watches?

What does "frozen" mean (e.g. for catcodes)?

What are the effects of abstaining from eating a certain flavor?

Who goes first? Person disembarking bus or the bicycle?

Can you create a free-floating MASYU puzzle?

Need a non-volatile memory IC with near unlimited read/write operations capability

I'm feeling like my character doesn't fit the campaign

Ping failure monitor

Ping failure monitor

OpenVPN, Server 12.04, connect to machines in home LAN behind VPN serverx230 tablet , realtek 8192ce connects to router but no internet12.04 - Extra default route breaks internetip netns monitor not working in a scriptWifi connected but no internet access (Lubuntu 14.04)Ubuntu machine not responding to ping from Windows machine on same network -2Ping yes, Internet noUbuntu server 16.04 can't ping outside IP's or domains or do updatesPC (Ubuntu 18.04.01 Server Edition) and laptop (VMware Ubuntu 18.04.01 Server Edition) linked via cable: ping works only one-wayCan't ping my ubuntu 18.04 from Windows machines using FQDN

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

1

the network frequently fails and I would like to monitor the output. I tried to makeshift a command like:

ping www.google.fr | while read pong; do echo "$(date): $pong"; done 1>/dev/null && 2> ~/ping_err.log

but the STDERR is still redirected to STDOUT instead ping_err.log

note:
I want only STDERR in the file (not 2>&1)

Thanks!

networking

share|improve this question

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I can't test it right now, but shouldn't it work if you omit the &&?
  
  – danzel
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  actually, the && was added but the stderr is still on the screen
  
  – Brad Thompson
  8 hours ago
  

  
  
  
  

add a comment | 

1

the network frequently fails and I would like to monitor the output. I tried to makeshift a command like:

ping www.google.fr | while read pong; do echo "$(date): $pong"; done 1>/dev/null && 2> ~/ping_err.log

but the STDERR is still redirected to STDOUT instead ping_err.log

note:
I want only STDERR in the file (not 2>&1)

Thanks!

networking

share|improve this question

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I can't test it right now, but shouldn't it work if you omit the &&?
  
  – danzel
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  actually, the && was added but the stderr is still on the screen
  
  – Brad Thompson
  8 hours ago
  

  
  
  
  

add a comment | 

the network frequently fails and I would like to monitor the output. I tried to makeshift a command like:

ping www.google.fr | while read pong; do echo "$(date): $pong"; done 1>/dev/null && 2> ~/ping_err.log

but the STDERR is still redirected to STDOUT instead ping_err.log

note:
I want only STDERR in the file (not 2>&1)

Thanks!

networking

share|improve this question

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

ping www.google.fr | while read pong; do echo "$(date): $pong"; done 1>/dev/null && 2> ~/ping_err.log

share|improve this question

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

share|improve this question

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

asked 8 hours ago

Brad ThompsonBrad Thompson

4888 bronze badges

2 Answers
2

active

oldest

votes

2

Rather than answer your stderr redirection question, I'll suggest a better (IMHO) way:

In https://github.com/waltinator/net-o-matic.git - Watch for (WiFi) network going down, then do a user-specified thing to fix it.

There's a way to monitor your connection:

  ip monitor address | 

    egrep --line-buffered 

    '^Deleted [[:digit:]]+: [[:alnum:]]+[[:space:]]+inet[[:space:]].* scope global ' | 

    while read line ; do

       ...

My net-o-matic script also contains a way to ask once:

function netstate () {

    # Return network state as "UP" or "DOWN"

    #Adjust how you decide net is UP/DOWN

    ip link show | egrep -q 'UP,LOWER_UP.* state UP'

    if [[ $? -eq 0 ]] ; then

        echo "UP"

    else

        echo "DOWN"

    fi

}

share|improve this answer

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

add a comment | 

0

Using your code, this seems to work:

$ ping www.google.fr 2>&1 > /dev/null | while read pong; do echo "$(date): $pong" ; done 2>&1 > ping_err.log

[no output]

$ cat ping_err.log



vie jul  5 15:56:09 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:10 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:11 -...

share|improve this answer

edited 8 hours ago

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges

add a comment | 

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
});


}
});

draft saved

draft discarded

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

Name

Email

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1156228%2fping-failure-monitor%23new-answer', 'question_page');
}
);

Post as a guest

Name

Email

Required, but never shown

2

Rather than answer your stderr redirection question, I'll suggest a better (IMHO) way:

In https://github.com/waltinator/net-o-matic.git - Watch for (WiFi) network going down, then do a user-specified thing to fix it.

There's a way to monitor your connection:

  ip monitor address | 

    egrep --line-buffered 

    '^Deleted [[:digit:]]+: [[:alnum:]]+[[:space:]]+inet[[:space:]].* scope global ' | 

    while read line ; do

       ...

My net-o-matic script also contains a way to ask once:

function netstate () {

    # Return network state as "UP" or "DOWN"

    #Adjust how you decide net is UP/DOWN

    ip link show | egrep -q 'UP,LOWER_UP.* state UP'

    if [[ $? -eq 0 ]] ; then

        echo "UP"

    else

        echo "DOWN"

    fi

}

share|improve this answer

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

add a comment | 

2

Rather than answer your stderr redirection question, I'll suggest a better (IMHO) way:

In https://github.com/waltinator/net-o-matic.git - Watch for (WiFi) network going down, then do a user-specified thing to fix it.

There's a way to monitor your connection:

  ip monitor address | 

    egrep --line-buffered 

    '^Deleted [[:digit:]]+: [[:alnum:]]+[[:space:]]+inet[[:space:]].* scope global ' | 

    while read line ; do

       ...

My net-o-matic script also contains a way to ask once:

function netstate () {

    # Return network state as "UP" or "DOWN"

    #Adjust how you decide net is UP/DOWN

    ip link show | egrep -q 'UP,LOWER_UP.* state UP'

    if [[ $? -eq 0 ]] ; then

        echo "UP"

    else

        echo "DOWN"

    fi

}

share|improve this answer

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

add a comment | 

Rather than answer your stderr redirection question, I'll suggest a better (IMHO) way:

In https://github.com/waltinator/net-o-matic.git - Watch for (WiFi) network going down, then do a user-specified thing to fix it.

There's a way to monitor your connection:

  ip monitor address | 

    egrep --line-buffered 

    '^Deleted [[:digit:]]+: [[:alnum:]]+[[:space:]]+inet[[:space:]].* scope global ' | 

    while read line ; do

       ...

My net-o-matic script also contains a way to ask once:

function netstate () {

    # Return network state as "UP" or "DOWN"

    #Adjust how you decide net is UP/DOWN

    ip link show | egrep -q 'UP,LOWER_UP.* state UP'

    if [[ $? -eq 0 ]] ; then

        echo "UP"

    else

        echo "DOWN"

    fi

}

share|improve this answer

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

  ip monitor address | 

    egrep --line-buffered 

    '^Deleted [[:digit:]]+: [[:alnum:]]+[[:space:]]+inet[[:space:]].* scope global ' | 

    while read line ; do

       ...

function netstate () {

    # Return network state as "UP" or "DOWN"

    #Adjust how you decide net is UP/DOWN

    ip link show | egrep -q 'UP,LOWER_UP.* state UP'

    if [[ $? -eq 0 ]] ; then

        echo "UP"

    else

        echo "DOWN"

    fi

}

share|improve this answer

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

answered 8 hours ago

waltinatorwaltinator

23.6k77 gold badges4242 silver badges7272 bronze badges

0

Using your code, this seems to work:

$ ping www.google.fr 2>&1 > /dev/null | while read pong; do echo "$(date): $pong" ; done 2>&1 > ping_err.log

[no output]

$ cat ping_err.log



vie jul  5 15:56:09 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:10 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:11 -...

share|improve this answer

edited 8 hours ago

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges

add a comment | 

0

Using your code, this seems to work:

$ ping www.google.fr 2>&1 > /dev/null | while read pong; do echo "$(date): $pong" ; done 2>&1 > ping_err.log

[no output]

$ cat ping_err.log



vie jul  5 15:56:09 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:10 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:11 -...

share|improve this answer

edited 8 hours ago

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges

add a comment | 

Using your code, this seems to work:

$ ping www.google.fr 2>&1 > /dev/null | while read pong; do echo "$(date): $pong" ; done 2>&1 > ping_err.log

[no output]

$ cat ping_err.log



vie jul  5 15:56:09 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:10 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:11 -...

share|improve this answer

edited 8 hours ago

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges

$ ping www.google.fr 2>&1 > /dev/null | while read pong; do echo "$(date): $pong" ; done 2>&1 > ping_err.log

[no output]

$ cat ping_err.log



vie jul  5 15:56:09 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:10 -03 2019: ping: sendmsg: La red es inaccesible

vie jul  5 15:56:11 -...

share|improve this answer

edited 8 hours ago

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges

answered 8 hours ago

guillermo chamorroguillermo chamorro

19399 bronze badges