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Efficiently test if a port is open on Linux?
...mp;6
I'm using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes used by Bash for child processes, so 3,4,6,7,8, and 9 should be safe.
As per the comment below, to test for listening on a local server in a script:
exec 6<>/dev/tcp/127.0.0.1/445 || echo "N...
Using openssl to get the certificate from a server
...certificate of a remote server, which I can then use to add to my keystore and use within my java application.
11 Answers
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Git on Bitbucket: Always asked for password, even after uploading my public SSH key
...ollowing:
open your config file in your current repo ..
vim .git/config
and change the line with the url from
[remote "origin"]
fetch = +refs/heads/*:refs/remotes/origin/*
url = https://Nicolas_Raoul@bitbucket.org/Nicolas_Raoul/therepo.git
to
[remote "origin"]
fetch =...
How to replace strings containing slashes with sed?
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@MaxWaterman it's standard operating procedure when using sed that the regex command is put in double quotes. I didn't use them in my answer because I wasn't showing the whole sed command line but just the sed regex command string as the OP had ...
How to get the max of two values in MySQL?
...
Use GREATEST()
E.g.:
SELECT GREATEST(2,1);
Note: Whenever if any single value contains null at that time this function always returns null (Thanks to user @sanghavi7)
s...
How to pass an array within a query string?
...)
Form Examples
On a form, multi-valued fields could take the form of a select box set to multiple:
<form>
<select multiple="multiple" name="cars[]">
<option>Volvo</option>
<option>Saab</option>
<option>Mercedes</option...
Disable double-tap “zoom” option in browser on touch devices
...tion does not appear to work in iOS Safari v12+. I will update this answer and delete this note once I find a clear solution that covers iOS Safari.
CSS-only solution
Add touch-action: manipulation to any element on which you want to disable double tap zoom, like with the following disable-dbl-tap-z...
Code snippet or shortcut to create a constructor in Visual Studio
...a C# project.
So how to make a constructor
Press Ctrl+K and then Ctrl+X
Select Visual C#
Select ctor
Press Tab
Update: You can also right-click in your code where you want the snippet, and select Insert Snippet from the right-click menu
...
Convert JavaScript String to be all lower case?
...
what is time and space complexity of toLowerCase() function?
– Ramzan Chasygov
Apr 4 '18 at 17:41
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Is there a way to squash a number of commits non-interactively?
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@sebnukem - That's when we try to push the branch and the remote is configured to reject force pushes.
– avmohan
Feb 17 '16 at 10:47
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