VirtualTam's bookmarks

1. oss-security - backdoor in upstream xz/liblzma leading to ssh server compromise 2024-03-31

   tags: compression/lzma, compression/xz, linux, programming/c, programming/shell/bash, security, security/backdoor

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   • XZ Utils backdoor
   • xz/liblzma: Bash-stage Obfuscation Explained
   • /r/Linux - XZ Utils backdoor
   • Debian Bug report logs - #1068024 revert to version that does not contain changes by bad actor
   • FAQ on the xz-utils backdoor
   • LWN - A backdoor in xz
   • Everything I Know About the Xz Backdoor
2. gg - Essential utilities missing from the Go standard library 2023-09-20

   tags: programming/go

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3. astpath: A command-line search utility for Python ASTs using XPath syntax. 2022-08-02

   tags: command-line, parser, programming/python

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4. bandwhich: Terminal bandwidth utilization tool 2022-03-14

   tags: command-line, network, programming/rust

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5. Reining in the thundering herd ⛈ Getting to 80% CPU utilization with Django 2021-08-19

   tags: framework/django, gunicorn, network/http, network/http-server/haproxy, network/http-server/nginx, network/reverse-proxy, programming/python, protocol/fastcgi, uwsgi, web, wsgi

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   • https://rachelbythebay.com/w/2020/03/07/costly/
   • https://docs.gunicorn.org/en/stable/faq.html#does-gunicorn-suffer-from-the-thundering-herd-problem
   • https://uwsgi-docs.readthedocs.io/en/latest/articles/SerializingAccept.html
   • https://uwsgi-docs.readthedocs.io/en/latest/Options.html
   • https://web.archive.org/web/20160117023812/http://cramer.io/2013/06/27/serving-python-web-applications
   • https://circus.readthedocs.io/en/latest/
6. GitHub Enterprise Backup Utilities 2019-09-19

   tags: backup, repository, source-code-management, source-code-management/git, source-code-management/github

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7. command line - ss - linux socket statistics utility output format - Unix & Linux Stack Exchange 2019-07-16

   tags: command-line, linux, network, network/socket, terminal

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8. pat: Prometheus Alert Testing utility 2018-10-22

   tags: notification, observability, observability/time-series/prometheus, programming/testing

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9. cookiecutter: A command-line utility that creates projects from cookiecutters (project templates) 2018-09-27

   tags: programming/python, project, repository, source-code-management/git, template

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10. iproute2/iproute2.git - Iproute2 routing commands and utilities 2018-09-03

    tags: command-line, ethernet, hardware, linux, network, network/ip, wifi

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    • https://en.wikipedia.org/wiki/Iproute2
    • https://wiki.archlinux.org/index.php/Network_configuration
    • https://www.digitalocean.com/community/tutorials/how-to-use-iproute2-tools-to-manage-network-configuration-on-a-linux-vps
11. The USE Method: Utilization, Saturation and Errors 2018-08-18

    tags: application, observability, observability/logging, performance, plot, resource, service

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    • https://twitter.com/LindsayofSF/status/692191001692237825
    • http://peter.bourgon.org/blog/2016/02/07/logging-v-instrumentation.html
    • http://www.brendangregg.com/USEmethod/use-rosetta.html
12. libGDX - DragAndDrop 2018-04-29

    tags: graphics, libgdx, programming/java, user-interface

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    • https://github.com/libgdx/libgdx/blob/master/tests/gdx-tests/src/com/badlogic/gdx/tests/DragAndDropTest.java
    • https://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/scenes/scene2d/utils/DragAndDrop.html
    • https://stackoverflow.com/questions/16287759/how-to-drag-and-drop-actors-on-libgdx-scene2d
    • https://stackoverflow.com/questions/21426845/libgdx-drag-and-drop
    • https://gamedev.stackexchange.com/questions/87378/drag-and-drop-in-libgdx-target-and-source
    • https://gamedev.stackexchange.com/questions/134666/how-to-drag-and-drop-objects-in-libgdx
    • http://www.java-gaming.org/index.php?topic=33266.0
    • http://www.badlogicgames.com/forum/viewtopic.php?t=3023
    • http://www.badlogicgames.com/forum/viewtopic.php?t=16932
    • https://www.reddit.com/r/gamedev/comments/24q3ms/drag_and_drop_inventory_tutorials_with_libgdx/
      • http://pixelscientists.com/wordpress/?p=15
      • http://pixelscientists.com/wordpress/?p=17
      • http://pixelscientists.com/wordpress/?p=19
      • http://pixelscientists.com/wordpress/?p=21
      • http://pixelscientists.com/wordpress/?p=23
13. Centos/RHEL 7 - Fix LVM boot issues after migration from ESXi to VirtualBox 2018-04-20

    tags: boot, bootloader/grub, filesystem, filesystem/lvm, fstab, linux, linux/centos, linux/kernel, linux/red-hat

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    Here are the steps I used to migrate a CentOS 7 VM from (presumably?) an ESXi server, to a local VirtualBox environment.

    The LVM volumes were not detected at boot, and after the boot timeout, the OS fell back to the Dracut emergency shell.

    • get a CentOS minimal installation CD
    • check the VM's resources and peripherals:
      • ensure there are no floppy drives (!)
      • setup CPU and RAM resources
      • check virtual drives
      • add an SCSI optical drive if needed
    • optional: convert the virtual drive images from VMDK to VDI
    • mount the CentOS installation disc
    • boot on the installation disc:
      • select "Troubleshooting", then "Rescue"
      • let the rescue utility detect filesystems and mountpoints
    • $ chroot to the detected environment
    • backup files:
      • /etc/fstab
      • /boot/grub/grub.cfg
    • under /boot, backup the initrd and initramfs for the current configuration (these will be overwritten)
    • compare the current /etc/fstab with the output of $ lsblk and $ blkid
    • if needed, manually edit /etc/fstab to use the appropriate block device UUIDs, identifiers and mountpoints
    • regenerate GRUB configuration:
      • $ grub2-mkconfig -o /boot/grub2/grub.cfg
    • if needed, reinstall GRUB:
      • $ grub-install /dev/sda
    • rebuild initrd:
      • $ mkinitrd --force /boot/<initrd_image> <kernel_version>
    • rebuild initramfs:
      • $ dracut --force <kernel_version>
    • exit the chroot
    • unmount the installation disc
    • reboot
    • optional but highly recommended: cross your fingers
    • ...
    • profit!
14. Sphinx, apidoc and Django 2018-01-28

    tags: documentation, documentation/sphinx, framework/django, programming/api, programming/html, programming/python

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    • https://stackoverflow.com/questions/34461088/sphinx-apidoc-on-django-build-html-failure-on-django-core-exceptions-appregistr
    • https://stackoverflow.com/questions/19037649/using-sphinxs-sphinx-apidoc-utility-to-autogenerate-documentation-from-python-c
    • https://stackoverflow.com/questions/46375983/sphinx-apidoc-strange-output-for-django-app-models-py
    • http://www.sphinx-doc.org/en/stable/man/sphinx-apidoc.html
    • https://github.com/sphinx-doc/sphinx/issues/2095
    • https://samnicholls.net/2016/06/15/how-to-sphinx-readthedocs/
    • http://www.sphinx-doc.org/en/stable/ext/napoleon.html
15. CSS Utility Classes and "Separation of Concerns" 2017-09-02

    tags: component, programming/css, programming/html, semantic, web

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    • http://getbem.com/introduction/
    • https://csswizardry.com/2014/11/when-to-use-extend-when-to-use-a-mixin/
    • http://bulma.io/
    • http://nicolasgallagher.com/about-html-semantics-front-end-architecture/
16. TechNet NTttcp Utility: Profile and Measure Windows Networking Performance 2017-04-24

    tags: linux, microsoft/windows, network, network/tcp, performance

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    • https://github.com/Microsoft/ntttcp-for-linux
    • https://msdn.microsoft.com/en-us/library/windows/hardware/dn567663(v=vs.85).aspx
17. OpenVPN/easy-rsa: easy-rsa - Simple shell based CA utility 2017-03-24

    tags: cryptography/certificate, cryptography/certificate-authority, cryptography/encryption, network/transport-layer-security, sysadmin

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    https://wiki.archlinux.org/index.php/Easy-RSA

18. How to set up Emacs as a PHP Editor - philnewton.net 2016-12-10

    tags: command-line, development, editor, editor/emacs, mode, programming/php, web

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    And more generally, "emacs as a <language> IDE":

    • code completion
    • snippet / templates
    • project view
    • syntax checking
    • test harness utilities

    See also:

    • https://www.philnewton.net/guides/emacs-extensions/
    • https://www.philnewton.net/blog/exploring-emacs-packages/
19. GitHub - pallets/click: Python composable command line utility 2016-09-14

    tags: command-line, development, interface, programming/python, terminal

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20. Enfin une réforme utile de l'orthographe et de la grammaire | HOP 2016-03-26

    tags: alcohol/beer, bière, code, français, grammaire, orthographe, pluriel

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