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Efficiently test if a port is open on Linux?
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To determine if someone is listening, attempt to connect by loopback. If it fails, then the port is closed or we aren't allowed access. Afterwards, close the connection.
Modify this for your use case, such as sending an email, exiting the script on failure, or starting the required service.
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XSD: What is the difference between xs:integer and xs:int?
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The difference is the following:
xs:int is a signed 32-bit integer.
xs:integer is an integer unbounded value.
See for details https://web.archive.org/web/20151117073716/http://www.w3schools.com/schema/schema_dtypes_numeric.asp
For example, XJC (Java) generates Integer for xs:int ...
Calling JMX MBean method from a shell script
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The following command line JMX utilities are available:
jmxterm - seems to be the most fully featured utility.
cmdline-jmxclient - used in the WebArchive project seems very bare bones (and no development since 2006 it looks like)
Groovy script and JMX - prov...
How to set the environmental variable LD_LIBRARY_PATH in linux
...s is to add a custom .conf file to /etc/ld.so.conf.d, for example
sudo gedit /etc/ld.so.conf.d/randomLibs.conf
inside the file you are supposed to write the complete path to the directory that contains all the libraries that you wish to add to the system, for example
/home/linux/myLocalLibs
re...
Comparing object properties in c# [closed]
This is what I've come up with as a method on a class inherited by many of my other classes. The idea is that it allows the simple comparison between properties of Objects of the same Type.
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How can I get a JavaScript stack trace when I throw an exception?
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Edit 2 (2017):
In all modern browsers you can simply call: console.trace(); (MDN Reference)
Edit 1 (2013):
A better (and simpler) solution as pointed out in the comments on the original question is to use the stack property ...
git mv and only change case of directory
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You are in a case insensitive environment. Further, adding with out the -A will not take care of the remove side of the mv as Git understands it. Warning! Ensure that no other changes or untracked files are around when you do this or they will get c...
How should I log while using multiprocessing in Python?
... multiple processes using the Python 2.6 multiprocessing module . Because it uses multiprocessing , there is module-level multiprocessing-aware log, LOG = multiprocessing.get_logger() . Per the docs , this logger has process-shared locks so that you don't garble things up in sys.stderr (or wha...
convert string array to string
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edited Jan 30 '11 at 6:58
jmort253
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Code for Greatest Common Divisor in Python [closed]
... divisor (GCD) of a and b is the largest number that divides both of them with no remainder.
20 Answers
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