Get info about a web server cert openssl s_client -showcerts -connect registry.nexgen-poc.lan:5010 </dev/null Validate a crt against a CA crt openssl verify -CAfile rootCA.crt registry.nexgen-poc.lan.crt Thanks @Deep for spotting the error!

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I was writing a script to scrub a server prior to decommissioning, something simple that would just make the disks unusbale enough that someone couldnt boot the OS or easily read the data. This is by no stretch a comprehensive disk wipe, if someone is lookign to recover data from these disks what were are doing here is …

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To view the contents of a fiule but remove comments and new lines you can use this excellent little command. It will remove all lines that start with # or a new line, this is particulaly useful for viewing a config file that has 99% comments and a handful of actual values(E.G OpenStack config files) grep -v -e …

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1Failed to build and run instance: libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor: 2022-08-05T12:05:46.630755Z qemu-system-x86_64: -device vfio-pci,host=0000:c3:00.0,id=hostdev0,bus=pci.0,addr=0x5: vfio 0000:c3:00.0: group 15 is not viable 2Traceback (most recent call last): 3 File …

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If you want to diagnose HTTP traffic it's sometime usefull to use tcpfump to dump the packets either on the console or to a tile Here is a nice litte command I found to run a dump of all http traffic on a defined port tcpdump -A -s 0 'src 10.10.110.254 and tcp port 5000 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - …

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I was writing a script to interact with all local disks and i needed a simplied list of local disks, not partitions and not the loopback mounts..This is what I came up with lsblk -d | cut -f 1 -d" " | tail -n +2 | grep -v loop Which will give you a nice parseable output something like this 1sda 2sdb 3nvme0n1 …

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The MaaS CLI documentation is a bit trash Login to MaaS maas login admin http://10.10.110.250:5240/MAAS/api/2.0/ 5HvxATpW5487XmkSjZ:CXfC3McdvV9U9aefbp:wB9jGT8AJ4DUYArJ8dDqeRVczBwJEXMk Set the IPMI Cipher Suite ID to 'freeipmi-tools default' maas admin machine update bfyq3e power_parameters_cipher_suite_id='' Commission …

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Sometimes it's a necessary evil to make a bootable windows USB using your Ubuntu\Linux machine. If that terrible day ever arrives, you now have the tools to help. sudo bash woeusb-5.2.4.bash --device Win10_21H2_English_x64.iso /dev/sdb --target-filesystem NTFS For eveyrthing other than a Windows USB I normally use …

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I'm lazy and i dont like typing 3 different git commands just to perform a commit, so a quick Google search led me to this great little nugget https://stackoverflow.com/questions/19595067/git-add-commit-and-push-commands-in-one Add this function to the bottom of your ~/.bashrc file then hit 'source ~/.bashrc' and you …

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We know we shouldnt do it and we should all embrace IPv6 and move the the future yada yada yada. Dont get me wrong, I'm a hge fan of IPv6 and i think life would be unicorns and rainbows if we were all 100% ipv6, but the nasty realisty is that even in 2022 there are quite a few reason why we cant use it. If you find …

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