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13%
The Swiss Army knife of fault management
30.11.2025
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© Dmitry Rukhlenko, 123RF.com
07 08 09 10 11
13%
Quick patches with Ansible
27.05.2025
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Lead Image © David Crockett, Fotolia.com
for YAML. Listing 1 YAML Inventory File 01 --- 02 servers: 03 children: 04 debian_servers: 05 hosts: 06 # Pi-hole 07 pihole: 08 ansible
13%
Touring the top Knoppix debugging and rescue tools
30.11.2025
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Rafal Olechowski, 123RF.com
="4096" 12 13 # Last offset to try 14 final_offset="$(du -b "$DEV" | cut -f 1)" 15 16 # A free loop device 17 LOOP="/dev/loop2" 18 19 # Start 20 offset=0 21 22 while [ "$offset" -lt "$final_offset" ]; do
13%
Managing virtual machines
30.11.2025
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© Igor Klimov, 123RF.com
the script results. Listing 1 clone-vm 01 #!/bin/sh 02 03 export LIBVIRT_DEFAULT_URI=qemu:///system 04 05 lastid=$(tail -1 vm-list.txt) 06 newid=$(($lastid+1)) 07 vmname=vm$newid 08 echo
13%
Server virtualization with VirtualBox
30.11.2025
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© Federico Caputo, 123RF.com
. Listing 1 Installing the Extension Pack $ vboxmanage -v 4.1.12r77245 $ wget http://download.virtualbox.org/virtualbox/4.1.12/Oracle_VM_Virtualbox_Extension_Pack-4.1.12-77245.vbox-extpack $ sudo
13%
Debugging the Linux kernel with the Qemu emulator
30.11.2025
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© Daniela Mangiuca, 123RF.com
08 default: 09 $(MAKE) -C $(KDIR) M=$(PWD) modules 10 endif 11 12 clean: 13 rm -rf *.ko *.o *.mod.c *.mod.o modules.order 14 rm -rf Module.symvers .*.cmd .tmp
13%
Building a port scanner in Python
28.07.2025
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Lead Image © Leo Blanchette, 123RF.com
_port(host, port): 06 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: 07 s.settimeout(1) 08 try: 09 s.connect((host, port)) 10 print(f"[+] Port {port} is open") 11 except
13%
Password protection with Phpass
30.11.2025
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© Michael Moeller, fotolia.com
doesn't just contain the hash itself; it also contains all the additional information that Phpass meets later to verify the password: $2a$08$zEIaPFIg... The two characters that follow the first dollar
13%
Checking password complexity with John the Ripper
30.11.2025
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/64 BS]... DONE 07 Many salts: 45898 c/s real, 45898 c/s virtual 08 Only one salt: 45108 c/s real, 45186 c/s virtual 09 10 Benchmarking: FreeBSD MD5 [32/64 X2]... DONE 11 Raw: 10995 c/s real, 10995
13%
Enforce secure workstation configurations
28.07.2025
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Photo by Barnabas Piper on Unsplash
': 07 ensure => running, 08 enable => true, 09 hasrestart => true, 10 require => Package['openssh-server'], 11 } 12 13 augeas { 'Set SSH Protocol to 2': 14 context

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