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31%
TCP Stealth hides open ports
10.04.2015
Home »  Archive  »  2015  »  Issue 26: OpenS...  » 
Lead Image © momo5287, 123RF.com
is then establishment of a totally normal connection. If you want to try this out yourself, you can check out previous articles in Linux Magazine [4]-[6]. Alternatively, you can start with the Knockd [7] project
31%
Migrating CentOS to Rocky Linux with migrate2rocky
06.10.2022
Home »  Archive  »  2022  »  Issue 71: Kuber...  » 
Photo by Ray Hennessy on Unsplash
corresponds to RHEL 8 (with 4.x kernels), of which multiple minor versions have been released since. Rocky Linux 8.4 appeared over a month after RHEL 8.4, whereas 8.5 and 8.6 were released less than a week
31%
Visualizing time series data
21.08.2014
Home »  Archive  »  2014  »  Issue 22: OpenS...  » 
Lead Image © Maxim Kazmin, 123RF.com
_port = 2003; 10 11 # create Socket 12 my $socket = IO::Socket::INET -> new(PeerAddr => $remote_host, 13 PeerPort => $remote_port, 14 Proto => "tcp", 15 Type => SOCK_STREAM) 16 or die "Couldn
31%
Baselines are more important than  the  benchmark
06.10.2022
Home »  Archive  »  2022  »  Issue 71: Kuber...  » 
Lead Image © Lucy Baldwin, 123RF.com
, as opposed to what theory predicts. The OpenSSL project incorporates two useful benchmarks: openssl speed [6], which tests cryptographic performance in abstract on the local machine without any network access
31%
Managing Storage with LVM
07.11.2023
Home »  HPC  »  Articles  » 
                5.3M  8.2k  5.3M   1% /run/lock /dev/nvme1n1p1       1.1T  488G  468G  52% /home /dev/nvme0n1p1       536M  6.4M  530M   2% /boot/efi /dev/sda1            6.0T  3.4T  2.4T  60% /home2 tmpfs
31%
Programming with OpenMP
07.11.2011
Home »  HPC  »  Articles  » 
     #pragma omp parallel for shared (sum) private (i) 12     for ( i=0; i < 1000000; i++) { 13         #pragma omp critical (sum_total) 14         sum = sum + a[i]; 15     } 16     printf("sum=%lf\n",sum); 17
31%
File Compression for HPC
10.11.2021
Home »  HPC  »  Articles  » 
. As the level of compression increases, the amount of time to perform the compression increases and the amount of memory used increases. Compress level -6 is the default and is a reasonable trade-off between
31%
Real-World HPC: Setting Up an HPC Cluster
04.11.2011
Home »  HPC  »  Articles  » 
on enterprise-grade rack hardware, there is no reason one cannot follow along at home with a few beige boxes and an 10Mb hub, as long as the servers are capable of booting from the network with PXE [6]. PXE
31%
Managing containers with Podman
05.12.2019
Home »  Archive  »  2019  »  Issue 54: NVMe...  » 
Lead Image © sandrobrezger, photocase.com
Container $ podman images REPOSITORY TAG IMAGE ID CREATED SIZE localhost/nmap latest 53890e393585 34 seconds ago 425 MB ** $ podman run --rm localhost
31%
Warewulf 4 – Time and Resource Management
17.01.2023
Home »  HPC  »  Articles  » 
is working, boot the compute node and run timedatectl : $ ssh n0001 [laytonjb@n0001 ~]$ timedatectl                Local time: Sat 2022-12-17 11:31:26 EST            Universal time: Sat 2022-12

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