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51%
Saving Storage Space with Reduced Precision
19.06.2023
Home »  HPC  »  Articles  » 
="unformatted")     write(2) b     close(2)       end program The compiled code outputs the value of element (5,5)  for both the double-precision and real arrays: ./fortran_test1 a(5,5) = 9.9179648655938202 b(5,5) = 9
51%
Security without firewalls
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© rukanoga, 123RF.com
software, Postfix [2]. The story goes that the talented Venema needed to keep track of attacks on workstations at a university and wrote a piece of software capable of limiting port access by rules
51%
Script utilities in depth: grep, awk, and sed
30.11.2025
Home »  Archive  »  2011  »  Issue 4: Secure...  » 
© jirkaejc, 123RF.com
, appearing in alphabetical order but allowing intervening letters, you can use the search expression: "a.*e.*i.*o.*u" This would match lines 1, 2, and 3. If you want lines containing all five vowels in order
51%
Multiprocessing in Python with Fortran and OpenMP
22.12.2017
Home »  Archive  »  2017  »  Issue 42: Secur...  » 
Lead Image Photo by Zachary Young on Unsplash
wall clock time = ', wtime ! ! Terminate. ! write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'HELLO_OPENMP' write ( *, '(a)' ) ' Normal end of execution.' !stop end For testing, I used f2py to build
51%
Modern Fortran – Part 1
20.10.2016
Home »  HPC  »  Articles  » 
), has to be specified. Here is a simple example of the declaration:       INTEGER, TARGET :: a(3), b(6), c(9)       INTEGER, DIMENSION(:), POINTER :: pt2 Another quick example of multidimension arrays
51%
Secure Your Server with TCP Wrappers
02.10.2012
Home »  Articles  » 
 
addresses to connect /etc/hosts.allow , the file would simply look like this: sshd: 10.10.10.10, 1.2.3.4, 21.21.21.21 TCP Wrappers works nicely, even if you change the standard SSH port (it’s usually TCP
51%
Warewulf 4 – Python and Jupyter Notebooks
13.04.2023
Home »  HPC  »  Articles  » 
Interactive HPC applications written in languages such as Python play a very important part today in high-performance computing. We look at how to run Python and Jupyter notebooks on a Warewulf 4 ... spider" to find all possible modules and extensions. Use "module keyword key1 key2 ..." to search for all possible modules matching any of the "keys". [laytonjb@warewulf ~]$ module load anaconda.22.9
51%
What Is an Inode?
23.03.2022
Home »  HPC  »  Articles  » 
        Inodes    IUsed     IFree IUse% Mounted on udev            32968052      916  32967136    1% /dev tmpfs           32983590     1409  32982181    1% /run /dev/nvme0n1p2  31227904   814030  30413874    3% / tmpfs           32983590
51%
Process, Network, and Disk Metrics
26.02.2014
Home »  HPC  »  Articles  » 
:    import re                 # Needed for regex except ImportError:    print "Cannot import re module - this is needed for this application.";    print "Exiting..."    sys.exit();       def bytes2human(n
51%
Aligning filesystem partitions
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Lucy Baldwin, 123RF.com
to the minimum file allocation size a filesystem manages and effectively represent the smallest possible disk allocation for a file. (A smaller file would be padded with slack space to that minimum allocation

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