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Tracing applications with OProfile and SystemTap

30.11.2025

Home » Archive » 2010 » Issue 1: System... »

686 oprofile-0.9.5-4.fc12.i686 To profile the kernel, you need to tell OProfile where the kernel image is located with the --vmlinux option: opcontrol --setup --vmlinux=/usr/lib/debug/lib/ modules

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Machine learning and security

02.02.2021

Home » Archive » 2021 » Issue 61: Secur... »

Lead Image © Vlad Kochelaevskiy, 123RF.com

.sin(periods * 2 * np.pi * t) 12 return max(value, 0.0) 13 else: 14 value = np.sin(periods * 2 * np.pi * t) 15 return max(value, 0.0) 16 17 # building the data vector 18 my_data = [] 19 i = 0 20 while

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How to configure and use jailed processes in FreeBSD

14.03.2013

Home » Archive » 2013 » Issue 13: IPv6... »

/sbin/named ... 774 ?? SsJ 0:00,12 /usr/sbin/sshd ... 781 ?? IsJ 0:00,87 /usr/sbin/cron -s ... The jls command lets you view all the currently active jails, as shown in Listing 6. Listing 6 Active Jails

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Detecting malware with Yara

09.10.2017

Home » Archive » 2017 » Issue 41: Kuber... »

Lead Image © Mohamad Razi Bin Husin, 123RF.com

= "A pdf file that contains a bad link" 10 11 strings: 12 $pdf_magic = {68 47 77 22} 13 $s_anchor_tag = "s_uri = /$http.+$/ ascii" 15 16 condition: 17 $pdf_magic at 0 and (#s

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Network monitoring with Icinga and Raspberry Pi

17.02.2015

Home » Archive » 2015 » Issue 25: Safe... »

service_description PING 11 check_command check_ping!100.0,20%!500.0,60% 12 } 13 define service{ 14 use generic-service ; Name of service template to use 15

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Managing Linux Filesystems

13.06.2016

Home » Archive » 2016 » Issue 33: IPv6... »

Standard Filesystems Distribution Filesystem Debian (from v7.0 wheezy) ext4 Ubuntu (from v9.04) ext4 Fedora (from v22) XFS SLES (from v12

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Build a honeypot with real-world alerts

01.08.2019

Home » Archive » 2019 » Issue 52: Stop... »

. The takeaway is the -j LOG option (line 12), which logs port scanning behavior to a logfile with the iptables: prefix. Listing 1 iptable Rules 01 *filter 02 *filter 03 :INPUT ACCEPT [0:0] 04

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Supercharge your software upgrade routine

05.08.2024

Home » Archive » 2024 » Issue 82: Sover... »

install topgrade Updating crates.io index Downloaded topgrade v14.0.1 Downloaded 1 crate (4.4 MB) in 1.52s Installing topgrade v14.0.1 Updating crates.io index Downloaded async-io v1.13.0 Downloaded async

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Warewulf 4 – Python and Jupyter Notebooks

13.04.2023

Home » HPC » Articles »

=jupyter-notebook-%j.log module load anaconda.22.9.0 source activate shared_env node=$(hostname -s) user=$(whoami) port=9001 # print tunneling instructions to the jupyter-log echo -e " ====================== Command to create

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Managing virtual machines

30.11.2025

Home » Archive » 2012 » Issue 09: Windo... »

/sysconfig/network-scripts/ifcfg-eth0-e "s///" You need a similar approach with the Udev rules mentioned earlier. In this way, you can also replace the hostname so that it matches the name assigned during

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