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How do I force detach Screen from another SSH session?
... to type, but not entirely equivalent. It will attach the session a second time without detaching first, resulting in multi display mode.
– jlh
Jul 23 '16 at 8:27
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How do I kill background processes / jobs when my shell script exits?
I am looking for a way to clean up the mess when my top-level script exits.
13 Answers
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How to track child process using strace?
I used strace to attach to a process briefly. The process created 90 threads. When I found the offending thread, I had to tediously search for the parent thread, then the grandparent thread, and so on all the way to the root process.
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“unary operator expected” error in Bash if condition
... Someone bequeathed this bug to me in a build script. Saved me some time, thanks!
– Kyle
Aug 1 '18 at 19:05
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What is the difference between ports 465 and 587?
...nt services (with many behavior differences like requiring auth, different timeouts, different message modification rules, etc.) that happen to use a similar wire protocol.
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What is the purpose of using -pedantic in GCC/G++ compiler?
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I use it all the time in my coding.
The -ansi flag is equivalent to -std=c89. As noted, it turns off some extensions of GCC. Adding -pedantic turns off more extensions and generates more warnings. For example, if you have a string literal...
(grep) Regex to match non-ASCII characters?
On Linux, I have a directory with lots of files. Some of them have non-ASCII characters, but they are all valid UTF-8 . One program has a bug that prevents it working with non-ASCII filenames, and I have to find out how many are affected. I was going to do this with find and then do a grep to p...
Check if string contains only whitespace
How can I test if a string contains only whitespace?
11 Answers
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How to calculate age (in years) based on Date of Birth and getDate()
...e following method, see the update below:
try this:
DECLARE @dob datetime
SET @dob='1992-01-09 00:00:00'
SELECT DATEDIFF(hour,@dob,GETDATE())/8766.0 AS AgeYearsDecimal
,CONVERT(int,ROUND(DATEDIFF(hour,@dob,GETDATE())/8766.0,0)) AS AgeYearsIntRound
,DATEDIFF(hour,@dob,GETDATE())/8766 A...
PHP + curl, HTTP POST sample code?
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/**
* Get the response
* @return string
* @throws \RuntimeException On cURL error
*/
public function __invoke(array $post)
{
$ch = curl_init($this->url);
foreach ($this->options as $key => $val) {
curl_setopt($ch, $key, $val);
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