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How can I split a shell command over multiple lines when using an IF statement?
...ndows/WSL/Cygwin etc users:
Make sure that your line endings are standard Unix line feeds, i.e. \n (LF) only.
Using Windows line endings \r\n (CRLF) line endings will break the command line break.
This is because having \ at the end of a line with Windows line ending translates to
\ \r \n.
As M...
Capturing Groups From a Grep RegEx
...on the delimiter _, and returns just field 2 (field numbers start at 1)).
Unix philosophy is to have tools which do one thing, and do it well, and combine them to achieve non-trivial tasks, so I'd argue that grep + sed etc is a more Unixy way of doing things :-)
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How to get the seconds since epoch from the time + date output of gmtime()?
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If you got here because a search engine told you this is how to get the Unix timestamp, stop reading this answer. Scroll down one.
If you want to reverse time.gmtime(), you want calendar.timegm().
>>> calendar.timegm(time.gmtime())
1293581619.0
You can turn your string into a time tu...
Is mongodb running?
I have installed mongodb and the php drivers on my unix server.
9 Answers
9
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Timeout function if it takes too long to finish [duplicate]
...se an exception once that timer expires.
Note that this will only work on UNIX.
Here's an implementation that creates a decorator (save the following code as timeout.py).
from functools import wraps
import errno
import os
import signal
class TimeoutError(Exception):
pass
def timeout(seconds...
How can I get the list of files in a directory using C or C++?
...boost!).
The author of the windows compatibility layer is Toni Ronkko. In Unix, it is a standard header.
UPDATE 2017:
In C++17 there is now an official way to list files of your file system: std::filesystem. There is an excellent answer from Shreevardhan below with this source code:
#include <...
Do you need to use path.join in node.js?
as everyone knows Windows does paths with backslashes where Unix does paths with forward slashes. node.js provides path.join() to always use the correct slash. So for example instead of writing the Unix only 'a/b/c' you would do path.join('a','b','c') instead.
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How do I use the nohup command without getting nohup.out?
...s any and all HUP signals, no matter how they are sent.)
Explanation:
In Unixy systems, every source of input or target of output has a number associated with it called a "file descriptor", or "fd" for short. Every running program ("process") has its own set of these, and when a new process starts...
Converting datetime.date to UTC timestamp in Python
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For unix systems only:
>>> import datetime
>>> d = datetime.date(2011,01,01)
>>> d.strftime("%s") # <-- THIS IS THE CODE YOU WANT
'1293832800'
Note 1: dizzyf observed that this applies localized ...
How to validate IP address in Python? [duplicate]
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Note that this is a unix-only answer
– cowlinator
Feb 23 '18 at 20:40
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