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Increasing the maximum number of TCP/IP connections in Linux
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The ephermal port range defines the maximum number of outbound sockets a host can create from a particular I.P. address. The fin_timeout defines the minimum time these sockets will stay in TIME_WAIT state (unusable after being used once).
Usual system defaults are:
net.ipv4.ip_local_port_range = ...
Bash: infinite sleep (infinite blocking)
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BSD (or at least OS X) doesn't understand sleep infinity either, though it was a cool thing to learn about for Linux. However, while true; do sleep 86400; done ought to be an adequate substitute.
– Ivan X
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how to prevent “directory already exists error” in a makefile when using mkdir
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"Generally, stick to the widely-supported (usually posix-specified) options and features of these programs. For example, don't use ‘mkdir -p’, convenient as it may be, because a few systems don't support it at all and with others, it is not safe for parallel execution. " ...
Why is SCTP not much used/known
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Indeed, SCTP is used mostly in the telecom area. Traditionally, telecom switches use SS7 (Signaling System No. 7) to interconnect different entities in the telecom network. For example - the telecom provider's subscriber data base(HLR), with a swi...
Copy folder recursively in node.js
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As an amazing bonus, one can use ncp in a cross platform npm run scripts.
– Ciantic
Mar 5 '16 at 9:56
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Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
...Greenfield's book Two scoops of Django.
I resolved the issue by setting
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "project_name.settings.local")
in manage.py and wsgi.py.
Update:
In the above solution, local is the file name (settings/local.py) inside my settings folder, which holds the...
Replace spaces with dashes and make all letters lower-case
...re at the beginning, they won't be replaced
– Bonjour123
Aug 1 '19 at 21:13
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How to write URLs in Latex? [closed]
... This does not work correctly for me. For example, \url{https://asdfg.com\#123} produces # in text, however, the actual link it produces is https://asdfg.com%23123.
– MaxPowers
Aug 2 at 13:23
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C# convert int to string with padding zeros?
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Simply
int i=123;
string paddedI = i.ToString("D4");
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How to convert list to string [duplicate]
...pace between the quotes). Otherwise, you end up with a contiguous string ("123" instead of "1 2 3"). This is OK if that was the intention, but needs to be mentioned in the response.
– Bogdan
May 9 '16 at 19:43
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