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26%
Prepare, analyze, and visualize data with R
07.06.2019
Home »  Archive  »  2019  »  Issue 51: Self-...  » 
Lead Image © Buchachon Petthanya, 123RF.com
: Estimate Std. Error t value Pr(>|t|) (Intercept) 517.340 18.270 28.316 < 2e-16 *** wdayThursday -31.046 16.119 -1.926 0.0545 . wdayFriday -116.981 16.122 -7.256 1.08e-12 *** wday
26%
Monitor Your Nodes with collectl
28.03.2012
Home »  HPC  »  Articles  » 
and modified one line in /etc/collectl.conf by adding a little to the default statistics monitored. The line in /etc/collectl.conf is: DaemonCommands = -f /var/log/collectl -r00:00,7 -m -F60 -s+YZCD --iosize
26%
Sort out your SSH configs
07.10.2014
Home »  Archive  »  2014  »  Issue 23: 10 Ti...  » 
Lead Image © saniphoto, fotolia.com
, you should see the client config file ssh_config, which I'll get to a little later. If you've just installed the SSH server and want to be sure that it's listening, you can use the command lsof -i :22
26%
Endlessh and tc tarpits slow down attackers
02.02.2021
Home »  Archive  »  2021  »  Issue 61: Secur...  » 
Lead Image © Yewkeo, 123RF.com
. As surely as night follows day, automated attacks will target the default Secure Shell port (TCP port 22), so I will use SSH as the guinea pig test case with the knowledge that I can move the real SSH service
25%
Generate VM Images with virt-builder
15.04.2014
Home »  Articles  » 
 
the following command when you get there: wget http://libguestfs.org/download/builder/fedora-19.xz The image is only 164MB in size, so the download is done quickly. Back in the main directory of the libguestfs
25%
Virt-builder generates VM images in a flash
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Petris, fotolia.com
you get there: wget http://libguestfs.org/download/builder/fedora-19.xz The image is only 164MB in size, so the download is done quickly. Back in the main directory of the libguestfs distribution, you
25%
Backups using rdiff-backup and rsnapshot
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © Dmitry Pichugin, Fotolia.com
DestinationSizeChange 41943106 (40.0 MB) Another view of the file statistics lists which file effected the change: # gunzip -c /mnt/backup/rdiff-backup-data/file_statistics.\ 2015-03-15T10\:44\:06+01\:00.data.gz | awk '$2
25%
What's left of TLS
18.07.2013
Home »  Archive  »  2013  »  Issue 15: What’...  » 
Maria Dryfhout, 123RF
SHA1. A basic distinction is made in encryption between block ciphers and stream ciphers. A block cipher encrypts only a first block of a fixed length, for example 256 bits. A stream cipher can
25%
Setting up SSL connections on Apache 2
18.07.2013
Home »  Archive  »  2013  »  Issue 15: What’...  » 
pnphoto, 123RF
cryptography), in which each party has two keys. To create a certificate, you must first generate a private key for the server: openssl genrsa -aes256 -out privaterschluessel.pem 2048 The key length is 2048
25%
Cloud protection with Windows Azure Backup
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Oleksiy-Mark, 123RF.com
change the settings for the backup at any time, of course. You can also use Properties/Bandwidth Throttling to limit the bandwidth available to the online backup. You can enter data from 256Kbps to 1Gbps

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