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What is the correct file extension for GLSL shaders? [closed]
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@FrederikSlijkerman: No, it doesn't. MacOS X is a Unix at its core and file extensions were never used there for identifying thing. Yes, standard types get standard file extensions, but that's only a human readability thing. Maybe the Finder may rely on file extensions as he...
How to replace an entire line in a text file by line number
...ter setting capabilities you may want to have a look at this: grymoire.com/Unix/Sed.html#uh-2 It says the first character behind the s determines the delimiter. So to change your command to use for example the # it would be like this: sed -i '7s#.*#<param-value>http://localhost:8080/ASDF/serv...
What is the 
 character?
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It's the ASCII/UTF code for LF (0A) - Unix-based systems are using it as the newline character, while Windows uses the CR-LF PAIR (OD0A).
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Open file in a relative location in Python
...Edit:
As mentioned by kindall in the comments, python can convert between unix-style and windows-style paths anyway, so even simpler code will work:
with open("2091/data/txt") as f:
<do stuff>
That being said, the path module still has some useful functions.
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What is a stream?
... the box performs some transformation on the data (zipping it, or changing UNIX linefeeds to DOS ones, or whatever). Pipes are another thorough test of the metaphor: that's where you create a pair of streams such that anything you write into one can be read out of the other. Think wormholes :-)
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What algorithm gives suggestions in a spell checker?
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Spell checker is very easy to implement as in Unix spell program. The source code is available in public. The correction can be involved, one technique is to do edits and again check if this new word is in the dictionary. Such new edits can be grouped and shown to the us...
Check to see if python script is running
...hen the function exits
get_lock._lock_socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
try:
# The null byte (\0) means the socket is created
# in the abstract namespace instead of being created
# on the file system itself.
# Works only in Linux
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Execution time of C program
... "everywhere". There are system-specific functions, such as getrusage() on Unix-like systems.
Java's System.currentTimeMillis() does not measure the same thing. It is a "wall clock": it can help you measure how much time it took for the program to execute, but it does not tell you how much CPU time...
Is there a way for non-root processes to bind to “privileged” ports on Linux?
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Back in the day, port < 1024 was used in UNIX to UNIX protocols to prove the code running on the other end was running as root. This functioned reasonably well for a set of UNIX servers with common security.
– Joshua
Feb 2 '14 ...
Why do you need ./ (dot-slash) before executable or script name to run it in bash?
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Because on Unix, usually, the current directory is not in $PATH.
When you type a command the shell looks up a list of directories, as specified by the PATH variable. The current directory is not in that list.
The reason for not having...