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

1s440 · 11-27-2018, 04:42 AM

Hello all,

I wanted to check the date from the URL and here is my script below. Please let me know if its correct

Code:

date=`date +%Y-%m-%d`;
URL="http://google.com-$date";
while read var value
do
    "$var"= curl -XPUT 'http://google.com-'$date'
done

l0f4r0 · 11-27-2018, 05:17 AM

If you want to verify/debug your script, maybe you could start by displaying variables progressively so you see as soon as a problem arises

You can also add

Code:

set -xv

at the beginning

berndbausch · 11-27-2018, 06:04 AM

Quote:

Originally Posted by 1s440

Hello all,

I wanted to check the date from the URL and here is my script below. Please let me know if its correct

date=`date +%Y-%m-%d`;
URL="http://google.com-$date";
while read var value
do
"$var"= curl -XPUT 'http://google.com-'$date'
done

I don’t understand what the script is supposed to do, but here are a few comments.

You never use variable URL. You can get rid of it.
You never use variable value. You can get rid of it.
You read var, then try to assign something to var. This is not illegal but doesn’t make sense.
To assign something to var, don’t use the dollar or quote signs.
To assign the output of the curl command to var, use var=$(curl ....)
Toassign the return value of the curl command, run the curl command, then immediately var=$!.
Putting single quotes around $date has the effect that the date variable is not evaluated. Instead, the value of this expression is a literal $date.
There is an unclosed quote character in the curl command.

BW-userx · 11-27-2018, 06:34 AM

this hopefully will give you some insight on this.

https://stackoverflow.com/questions/...g-shell-script

1s440 · 11-27-2018, 06:48 AM

Quote:

Originally Posted by berndbausch

I don’t understand what the script is supposed to do, but here are a few comments.

You never use variable URL. You can get rid of it.
You never use variable value. You can get rid of it.
You read var, then try to assign something to var. This is not illegal but doesn’t make sense.
To assign something to var, don’t use the dollar or quote signs.
To assign the output of the curl command to var, use var=$(curl ....)
Toassign the return value of the curl command, run the curl command, then immediately var=$!.
Putting single quotes around $date has the effect that the date variable is not evaluated. Instead, the value of this expression is a literal $date.
There is an unclosed quote character in the curl command.

Thanks for the reply. Curl doesnot show the date from the url, would wget is the best option to fetch data from URL? The date varies everyday.

pan64 · 11-27-2018, 07:35 AM

I would suggest you to use www.shellcheck.net to check your script.

Quote:

Originally Posted by 1s440

Thanks for the reply. Curl doesnot show the date from the url, would wget is the best option to fetch data from URL? The date varies everyday.

Would be nice to explain what did you try, what's happened and what do you want to achieve.

I don't think this is valid: http://google.com-'$date'

1s440 · 11-27-2018, 08:05 AM

Quote:

Originally Posted by pan64

I would suggest you to use www.shellcheck.net to check your script.

Would be nice to explain what did you try, what's happened and what do you want to achieve.

I don't think this is valid: http://google.com-'$date'

Hi,

Thanks for the reply. I am trying to fetch the current date from URL ex: http://www.google.com/ and I would like to do a script such that if the URL doesnot display the current date then there should be an error.

pan64 · 11-27-2018, 08:07 AM

Sorry, but I do not understand. What do you mean by "to fetch the current date from URL"? URL usually does not contain date.
see for example: https://www.linuxquestions.org/quest...pt-4175643169/

berndbausch · 11-27-2018, 08:21 AM

Quote:

Originally Posted by 1s440

Thanks for the reply. Curl doesnot show the date from the url, would wget is the best option to fetch data from URL? The date varies everyday.

I don’t know how to show the current date using Google. However, you can show thw current date with the date command.

1s440 · 11-27-2018, 08:23 AM

Quote:

Originally Posted by berndbausch

I don’t know how to show the current date using Google. However, you can show thw current date with the date command.

yes with date command its possible but when i want to check for a website then its complicated

pan64 · 11-27-2018, 08:34 AM

so what do you want to check?

l0f4r0 · 11-27-2018, 08:39 AM

^ +1. Yes, please be specific. It will prevent misunderstandings (hence inappropriate advice) from happening.

1s440 · 11-28-2018, 02:27 AM

Hi we have configured apache such that when you browse the web server you see a welcome date for example if you have logged in today it shows today date. but I need to implement a monitoring check for this. whenever you login via the apache webserver you see a date if you login tomorrow it shows tommorrow date. last week I had a issue with that where it was not updating the current date. so I am trying now to implement a check. So I thought once I develop a script it would be easy to create monitoring check.

berndbausch · 11-28-2018, 03:35 AM

Quote:

Originally Posted by 1s440

Hi we have configured apache such that when you browse the web server you see a welcome date for example if you have logged in today it shows today date. but I need to implement a monitoring check for this. whenever you login via the apache webserver you see a date if you login tomorrow it shows tommorrow date. last week I had a issue with that where it was not updating the current date. so I am trying now to implement a check. So I thought once I develop a script it would be easy to create monitoring check.

So you don't trust the date command, and you want to use Google's date instead? If you explain to me how to show the current date with Google, we can help with your script.

It's probably better to fix your time management though. Ensure NTP is configured correctly and that you have access to one or more working NTP servers.

1s440 · 11-28-2018, 03:53 AM

Quote:

Originally Posted by berndbausch

So you don't trust the date command, and you want to use Google's date instead? If you explain to me how to show the current date with Google, we can help with your script.

It's probably better to fix your time management though. Ensure NTP is configured correctly and that you have access to one or more working NTP servers.

Hi I took google as an example, As said we use date command on the server to get the current date but when you wanted to develop some monitoring checks its complicated and doesnot work.when I try to execute the script i am getting errors. Ofcourse NTP is configured correctly