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Skip to main content scripts, configs, fixes Main navigation Home About CV (Résumé) Neil Grant Uphills Bash'isms Howto change the extension of multiple files Howto iterate through an input stream without a subshell or a read. Howto loop based on some iterator Howto use arrays in bash to store indexed information iptohex (convert an ipaddress into hexadecimal) pingmany sshdel delete ssh key by line number update_machine (update the config files on a machine) Books Mastering Puppet Second Edition Troubleshooting Puppet Puppet Cookbook Third Edition Mastering Puppet Puppet 5 Cookbook Narrabilis uphillian Talks puppet modulepath problem "Resource type not found" While setting up some cluster machines to run masterless I ran into this bug. I had a directory structure like this: code module1 manifests module2 modules module3 manifests When running puppet apply with the modulepath code:code/module1/modules I ran into this error, specifically using the logrotate module. Error: Evaluation Error: Resource type not found Logrotate::Size (file: code/modules/logrotate/manifests/conf.pp, line: 32, column:12) ssh public key / private key mismatch I updated my private key and added the public key to the authorized_keys on my target hosts and it didn't work. I ran a few verbose connections to see that the key was being sent, but not accepted. Turns out the old version of ssh on this server doesn't generate the public key from the private key, it reads the id_rsa.pub file to send the public key. Since this public key doesn't match what's in authorized_keys, I was denied. The solution was to delete the public key. Alternatively, you can generate the public key with ssh-keygen. Linux System Troubleshooting Slides from LISA 2019 Linux systems troubleshooting # LISA2019 https://www.slideshare.net/ThomasHowardUphill/linux-system-troubleshooting Process (ps) display shortcuts in bash I gave a talk on processes and made some simple shortcuts to show processes matching patterns. psg ps - grep, grep the process listing for something and show the parent pid, sort by pid. Grub2 Dual Boot EFI Secure Boot Linux / Windows I just got a new laptop with Secure Boot and was having trouble getting Windows and Fedora installed in a dual boot configuration. I read a few posts on how to do it by changing the bios to Legacy mode but that didn't seem like much fun. Fedora 30 installed to secure with no problem, so I knew it was possible. I started by paritioning the disk with a GPT partition table and the following partitions: Virtualbox Headless Command Line Hacks For reasons I'm running vagrant with VirtualBox inside a docker container. Most of the time this goes great and no problems, but when it fails it's difficult to see what's happening on the machine. I've tried and failed to get VNC going on the vm running inside the container. I should note that my problem is with Windows VMs, with Linux VMs it's never a problem to get console. My workaround for Windows is to use screenshots and send keystrokes to the vm via vboxmanage. First step is to get the uuid or name of the vm Nokogiri install on MacOSX Getting nokogiri to install was failing for me. I'm using bundler and needed nokogiri. Gem is trying to compile it and failing on libxml2. At first I tried using the libxml from brew, that that didn't work, so specified where to find XCode's version of libxml in my bundle config. HTML email with plain mailer plugin on Jenkins We build our Jenkins from a docker container, setting up that with code requires setting up the plugin from groovy. I didn't want to figure out how to translate our config for the plain mailer plugin to the email-ext plugin. I started using the plain mailer plugin but decided I'd like to send the email in HTML format. Once again, Jenkins docs were terrible, but reading the code, it looked like mimetype was supported. I came up with the following code to send an HTML email from the Jenkinsfile git sparse checkout within Jenkinsfile I needed to checkout some code from another repository into my project, but I only wanted a specific directory within the other repository. As usual with Jenkins, the docs are lacking, but reading the source for a bit I came up with the following: Linux System Troubleshooting Talk I gave at #LISA2018 . I've given this talk as a half day tutorial, at LISA2018 I gave it in 90minutes. The bulk of the talk is laying a solid foundation on how Linux works. Slides Pagination Current page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 … Next page Next › Last page Last » Subscribe to Follow @uphillian github.com/uphillian LinkedIn/in/thomasuphill amazon.com/author/uphillian Books: - Puppet 5 Cookbook - Fourth Edition - Mastering Puppet Second Edition - Mastering Puppet - Puppet Cookbook 3rd Edition - Troubleshooting Puppet Springdale Linux I published a Thing on @thingiverse! https://t.co/xK6XzN7Cbh #thingalert Fri Jun 12 17:08:46 +0000 2020 Slides from LISA 2019 Linux systems troubleshooting #LISA2019 https://t.co/D4dMKflK6R Tue Oct 29 05:59:30 +0000 2019 https://t.co/AGeihMALAv configuring grub2 with EFI Fri Sep 13 05:20:01 +0000 2019 I published a Thing on @thingiverse! https://t.co/IYpRyEb7Hz #thingalert Tue Jul 23 19:27:57 +0000 2019 Nokogiri install on MacOSX https://t.co/v3An0miW9L Fri Jul 12 15:06:49 +0000 2019 Copyright 2019 - All Rights Reserved...