[SOLVED] Synchronization of date between server and apache webserver, grep and sed instructions.

1s440 · 12-05-2018, 08:13 AM

Quote:

Originally Posted by michaelk

The date command -u option (date -u "+%H") displays the hours as UTC which is the same as GMT which should match the header time. In your code your forgot the "$" in your if statement variables and you should use [[ instead of ((.

Code:

if [[ $Date == $VAR ]]; then
   echo "Hours match"
else 
   echo "Hours not match"
fi

Code:

#!/bin/bash

wtime=$(curl -i http://google.com/ 2>/dev/null | grep Date | sed 's/Date: //')
t3=$(cut -d' ' -f5 <<< "$wtime")
hr=$(cut -d':' -f1 <<< "$t3")
ltime=$(date -u "+%H:%M:%S")
lhr=$(date -u "+%H")
echo "Web Server time=$t3, Server time=$ltime"
if [[ $lhr == $hr ]]; then
   echo "Hours match"
else
   echo "Hours not match"
fi

I've added additional output to display the web server HTML header time and your server time as a visual display.

hmm. this works. Thanks a lot but with GMT timings.

michaelk · 12-05-2018, 08:24 AM

Code:

VAR=$(curl -i http://server_url/ 2>/dev/null | awk 'BEGIN{FS="[ :]"} /Date: /{print $7}')

Oops, in addition to what I posted above since the VAR is basically a string that contains a line feed character using (( )) in your if statement fails.

Quote:

Thanks a lot but with GMT timings.

Not quite. The linux system clock is referenced to UTC (GMT) and it is the timezone setting that converts it to local time that is displayed on the desktop and via the date command.

pan64 · 12-05-2018, 08:40 AM

I would rather convert the time into long int format (date %s) and check based on that.

1s440 · 12-10-2018, 08:57 AM

is it also possible to display with other timezones

l0f4r0 · 12-10-2018, 09:33 AM

Quote:

Originally Posted by 1s440

is it also possible to display with other timezones

You can play with "TZ" environment variable

1s440 · 12-20-2018, 03:04 AM

on the nagios monitoring it shows me the wrong output

Quote:

user@nagios:/usr/local/nagios/plugins# ./check_date.sh -H www.myserver.com
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 980 100 980 0 0 20736 0 --:--:-- --:--:-- --:--:-- 20851
Today date is we, 19 Dec 2018
Output is
Date is wrong

l0f4r0 · 12-20-2018, 03:56 AM

^ Please provide us with check_date.sh script content

1s440 · 12-20-2018, 04:03 AM

Quote:

Originally Posted by l0f4r0

^ Please provide us with check_date.sh script content

But on the server it displays correct when i use it on the nagios and check it shows me wrong. confused

Code:

#!/bin/bash 
myDate=$(date "+%a, %d %b %Y")
VAR=$(curl -i http://myserver.com/sample.htm | sed -n '/Date/s/Date: //p')
echo "Today date is $myDate"
echo "Output is $VAR"
if [[ ${VAR%% [[:digit:]][[:digit:]]:*} == $myDate ]]; then
echo "Date is correct"
else
echo "Date is wrong"
fi

l0f4r0 · 12-20-2018, 04:28 AM

In check_date.sh, did you replace the following bogus instruction?

Code:

curl -i http://myserver.com/sample.htm

Plus, why are you using switch -H when you are calling your script? And why are you specifying a parameter as your script doesn't deal with any (the URL is hard-coded inside the script itself)?

1s440 · 12-20-2018, 04:51 AM

Quote:

Originally Posted by l0f4r0

In check_date.sh, did you replace the following bogus instruction?

Code:

curl -i http://myserver.com/sample.htm

Plus, why are you using switch -H when you are calling your script? And why are you specifying a parameter as your script doesn't deal with any (the URL is hard-coded inside the script itself)?

Hi I wanted to run a script on the host from nagios server thats why i am specifiying hostname where the script should be tested. I placed my script under /usr/local/nagios/plugins/ and executing on hostname www.myserver.com with the help of -H

michaelk · 12-20-2018, 04:53 AM

Quote:

Today date is we, 19 Dec 2018
Output is

$VAR is empty. I assume you are using the same website as previously? Is the format different i.e sed is failing to find the string Date:? Running from the nagios server isn't working the same.

1s440 · 12-20-2018, 05:26 AM

Quote:

Originally Posted by michaelk

$VAR is empty. I assume you are using the same website as previously? Is the format different i.e sed is failing to find the string Date:? Running from the nagios server isn't working the same.

yes the output is empty, I am using the same website.
sorry seems my fault the script is placed on nagios plugins not on the host plugins. i think i should add service config

pan64 · 12-20-2018, 05:36 AM

the script you posted does not accept -H <server> arguments, therefore hard to say anything.
From the other hand you need to save stderr and check if there was anything in it. This would be the best place to find the reason.

1s440 · 12-21-2018, 02:35 AM

Quote:

Originally Posted by pan64

the script you posted does not accept -H <server> arguments, therefore hard to say anything.
From the other hand you need to save stderr and check if there was anything in it. This would be the best place to find the reason.

Hi modified the script curl command and now i am able to match.

Quote:

curl -v --silent "http://myserver.com/sample.htm/" 2>/dev/null \ | grep Date | sed -e 's/< Date: //'); date "+%a, %d %b %Y"