February 5, 2022 in Tips and Tricks
To solve it (on Windows) just do the following:
Open the Task Manager
Find the process CoreSync.exe and right click > Open file location
Delete the file
Find the process CCXProcess.exe and right click > Open file location
Delete the file
Note: backup it before deleting
January 25, 2022 in Tips and Tricks, Ubuntu
grep "session opened" /var/log/auth.log
cat /var/log/auth.log | grep "session opened"In order to display extra information about the failed SSH logins, issue the command as shown in the below example.
egrep "session opened|successful" /var/log/auth.logJanuary 25, 2022 in Tips and Tricks, Ubuntu
grep "Failed password" /var/log/auth.log
cat /var/log/auth.log | grep "Failed password"In CentOS or RHEL, the failed SSH sessions are recorded in /var/log/secure file. Issue the above command against this log file to identify failed SSH logins.
egrep "Failed|Failure" /var/log/auth.logA slightly modified version of the above command to display failed SSH logins in CentOS or RHEL is as follows.
# grep "Failed" /var/log/secure
# grep "authentication failure" /var/log/secure
January 23, 2022 in Tips and Tricks
1.Find “Call forwarding”
January 22, 2022 in Php, Tips and Tricks
<?php
$min=1;
$max=20;
echo rand($min,$max);
?>$min=1;
$max=20;
echo mt_rand($min,$max);January 21, 2022 in Php, Tips and Tricks
HTML forms provide three methods of encoding.
application/x-www-form-urlencoded (the default)multipart/form-datatext/plainWork was being done on adding application/json, but that has been abandoned.
(Other encodings are possible with HTTP requests generated using other means than an HTML form submission. JSON is a common format for use with web services and some still use SOAP.)
The specifics of the formats don’t matter to most developers. The important points are:
text/plain.When you are writing client-side code:
multipart/form-data when your form includes any <input type="file"> elementsmultipart/form-data or application/x-www-form-urlencoded but application/x-www-form-urlencoded will be more efficientWhen you are writing server-side code:
Most (such as Perl’s CGI->param or the one exposed by PHP’s $_POST superglobal) will take care of the differences for you. Don’t bother trying to parse the raw input received by the server.
Sometimes you will find a library that can’t handle both formats. Node.js’s most popular library for handling form data is body-parser which cannot handle multipart requests (but has documentation that recommends some alternatives which can).
If you are writing (or debugging) a library for parsing or generating the raw data, then you need to start worrying about the format. You might also want to know about it for interest’s sake.
application/x-www-form-urlencoded is more or less the same as a query string on the end of the URL.
multipart/form-data is significantly more complicated but it allows entire files to be included in the data. An example of the result can be found in the HTML 4 specification.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>upload</title>
</head>
<body>
<form action="http://localhost:8000" method="post" enctype="multipart/form-data">
<p><input type="text" name="text1" value="text default">
<p><input type="text" name="text2" value="aωb">
<p><input type="file" name="file1">
<p><input type="file" name="file2">
<p><input type="file" name="file3">
<p><button type="submit">Submit</button>
</form>
</body>
</html>January 21, 2022 in Jobs, Only Happened In India, Tips and Tricks
Cost to Company (CTC) is the yearly expenditure that a company spends on an employee. Each employee spend depends on their salary and variable. CTC is calculated by adding salary and additional benefits that an employee receives such as EPF, gratuity, house allowance, food coupons, medical insurance, travel expense and so on. CTC in colloquial terms is the cost an employer bears to hire and sustain its employees.
Formula: CTC = Gross Salary + Benefits.
If an employee’s salary is ₹40,000 and the company pays an additional ₹5,000 for their health insurance, the CTC is ₹45,000. Employees may not directly receive the CTC amount as cash.
January 17, 2022 in Php, Tips and Tricks
RewriteRule ^mr-upload?$ index.php?page=mr-upload [L,QSA]RewriteRule ^tagged/([^/]+)/page-(\d+)/?$ index.php?TagSearchResults&TagName=$1&Page=$2 [L,QSA]
RewriteRule ^tagged/([^/]+)/?$ index.php?TagSearchResults&TagName=$1&Page=1 [L,QSA]January 17, 2022 in Technology, Tips and Tricks
When you ssh to a server, you have 2 minutes to login. If you don’t successfully login within 2 minutes, ssh will disconnect. 2 minutes time to login successfully is too much. You should consider changing it to 30 seconds, or may be 1 minute.
January 17, 2022 in Tips and Tricks
lastb only shows login failures. Use last to see successful logins.
It shows people trying to upload or download content. The “notty” part means no tty (where tty is short for teletype) which these days means no monitor or gui, and the ssh indicates port 22, which taken together mean something like scp or rsync.
So not hacking or login attempts, but wrong or mistyped passwords. It might be some content was located via google, but required a password which someone tried to guess.
Actually, on reflection, the above is not right. They could be failed login attempts via ssh, as the questioner suspected; and (as I missed first time) they are at regular 21 or 22 minute intervals which suggests a degree of automation, but lastb shows failures by definition, so these results would need to be compared against last to see if any were successful.
Lastb is the same as last, except that by default it shows a log of the file /var/log/btmp, which contains all the bad login attempts.
