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18%
A smoke-jumping admin's best friend
09.04.2019
Home »  Archive  »  2019  »  Issue 50: Bpfilter  » 
Lead Image © Thomas Detert, Fotolia.com
. Figure 1: Ncurses-based menuconfig (Wikipedia, CC BY-SA 3.0). Another option is Newt [22], a programming library that focuses on color TUIs (Figure 2) and uses a widget approach, making programming
18%
Detect failures and ensure high availability
22.05.2023
Home »  Archive  »  2023  »  Issue 75: Teamwork  » 
Photo by Tim Foster on Unsplash
Note that if you are seeing the following error when changing node roles, $ sudo drbdadm secondary r0 0: State change failed: (-12) Device is held open by someone Command 'drbdsetup-84 secondary 0
18%
Virtual switching with Open vSwitch
28.07.2011
Home »  CloudAge  »  Articles  » 
 
10 [ ID] Interval Transfer Bandwidth 11 [ 3] 0.0 60.0 sec 5.80 GBytes 830 Mbits/sec You can now restrict the send performance. Note that the command expects you to enter the send
18%
Build secure IoT applications with open source
03.12.2015
Home »  Archive  »  2015  »  Issue 30: OpenD...  » 
Lead Image © Maksim Kabakou, 123RF.com
: Mbed TLS [4]: The new name of PolarSSL after the acquisition by ARM. It's an embedded-friendly TLS (DTLS since version 2.0) library. Implemented in C and easy to port to new targets. TinyDTLS [5
18%
Kubernetes clusters within AWS EKS
02.08.2021
Home »  Archive  »  2021  »  Issue 64: Bare...  » 
Lead Image © Zlatko Guzmic, 123RF.com
blown EKS cluster. You can minimize the costs by decreasing the number of worker nodes. The billing documentation states (at the time of writing, at least, so your mileage might vary): "You pay $0.10 per
18%
HPC Cloud Storage
20.11.2013
Home »  HPC  »  Articles  » 
_blocks.. ..symlink_targets.. ..names.. ..contents.. ..ext_attributes.. Compressing and uploading metadata... Wrote 0.00 MiB of compressed metadata. First, notice that I created the file as root. Second, the prefix
18%
HDF5 with Python and Fortran
21.03.2017
Home »  HPC  »  Articles  » 
   # =================== 09   # 10  if __name__ == '__main__': 11  12      f = h5py.File("mytestfile.hdf5", "w") 13  14      dset = f.create_dataset("mydataset", (100,), dtype='i') 15     16      dset[...] = np.arange(100) 17
18%
Protecting Samba file servers in heterogeneous environments
09.06.2018
Home »  Archive  »  2018  »  Issue 45: Autom...  » 
Photo by rawpixel on Unsplash
0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 192.168.56.210:445 0.0.0.0:* LISTEN tcp 0 0 192.168.56.210:139 0.0.0.0
18%
PowerDNS Authoritative server high availability with MariaDB Galera
02.08.2022
Home »  Archive  »  2022  »  Issue 70: Defen...  » 
Lead Image © Sergey Nivens, 123RF.com
A quick edit of your pristine MariaDB server's configuration file /etc/my.cnf.d/server.cnf (1) binds the MariaDB service to the localhost and (2) connects and (3) creates the database: Bind-address = 127.0.0
18%
Testing the Samsung MU-PA500B 500GB SSD
04.10.2018
Home »  Archive  »  2018  »  Issue 47: Findi...  » 
Lead Image © Lucy Baldwin, 123RF.com
statistics --- 3 requests completed in 623.9 us, 12 KiB read, 4.81 k iops, 18.8 MiB/s generated 4 requests in 3.35 s, 16 KiB, 1 iops, 4.77 KiB/s min/avg/max/mdev = 200.4 us / 208.0 us / 221.4 us / 9.51 us

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