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Finding the fastest SD cards for the Raspberry Pi
03.08.2023
Home »  Archive  »  2023  »  Issue 76: Energ...  » 
Lead Image © Lucy Baldwin, 123RF.com
with the hdparm [7] tool as: sudo hdparm -t /dev/mmcblk0 Sequential writes is a large continuous write, forcing filesystem sync to ignore caching effects. Run with the dd [8] tool as: sudo dd if=/dev/zero of
9%
TKperf – Customized performance testing for SSDs and HDDs
18.07.2013
Home »  Archive  »  2013  »  Issue 15: What’...  » 
Orcea David, 123RF
-compressible test data. TKperf requires Fio 2.0.3 or higher. In older versions of Fio, some terse output information is missing; this is minimal output that can be easily processed by other programs [4
9%
News for Admins
07.10.2025
Home »  Archive  »  2025  »  Issue 89: Autom...  » 
 
on YouTube (https://www.youtube.com/watch?v=GfH4QL4VqJ0), features accounts from Guido van Rossum, Travis Oliphant, Barry Warsaw, and many others. It tells "the story of Python's rise, its community
9%
High-performance Python – compiled code and C interface
01.08.2019
Home »  Archive  »  2019  »  Issue 52: Stop...  » 
Lead Image © Konrad Bak, 123RF.com
]. It was run in a Jupyter notebook to get the timings. Listing 1 Python First Run Without Numba import numpy def sum(x): total = 0 for i in range(x.shape[0]): total +=x[i] return
9%
The RADOS object store and Ceph filesystem
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Brigida Soriano, Fotolia.com
/ceph/$name.keyring 04 [mon] 05 mon data = /srv/mon.$id 06 [mds] 07 [osd] 08 osd data = /srv/osd.$id 09 osd journal = /srv/osd.$id.journal 10 osd journal size = 1000 11 [mon.a] 12 host = alice 13 mon
9%
Port Knocking
07.10.2014
Home »  Archive  »  2014  »  Issue 23: 10 Ti...  » 
Lead Image © rasslava, 123RF.com
services, # as decided by the '/usr/sbin/tcpd' server. # SSHD: 12.34.56.78, 78.56.43.12 I should mention that I've been caught out in the past when adding TCP Wrappers to a server already running
9%
Credential management with HashiCorp Vault
09.10.2017
Home »  Archive  »  2017  »  Issue 41: Kuber...  » 
. Listing 1 HCL Configuration File backend "file" { path = "/opt/vault/store.db" } listener "tcp" { address = "0.0.0.0:8200" tls_cert_file = "/opt/vault/server.pem" tls_key_file = "/opt
9%
Kubernetes StatefulSet
05.02.2023
Home »  Archive  »  2023  »  Issue 73: Datab...  » 
Photo by Ashley Light on Unsplash
). In such an environment, a "dedicated" MariaDB container could be run as a replacement for a MariaDB VM: podman run --name maria --volume /var/pods/maria:/var/lib/mysql:Z --net pub_net --ip 192.168.1.10 --mac-address 12
9%
Security in the AWS cloud with GuardDuty
09.04.2019
Home »  Archive  »  2019  »  Issue 50: Bpfilter  » 
Lead Image © xcfoto, 123RF.com
"guardduty:*" 08 ], 09 "Resource": "*" 10 }, 11 { 12 "Effect": "Allow", 13 "Action": [ 14 "iam:CreateServiceLinkedRole" 15 ], 16 "Resource": "arn:aws:iam
9%
File access optimization discovery and visualization
27.05.2025
Home »  Archive  »  2025  »  Issue 87: Light...  » 
Photo by Barnabas Davoti on Unsplash
classifies each pair into self-defined optimization categories. Category 0 means it cannot be optimized. Category 1 means it can easily be optimized. Category 2 means that although one or more other

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