Force DNS refresh for ping in CentOS7
I came across an issue where I updated /etc/resolv.conf but name resolution wasn’t working in Cent7. nslookup & host both returned results, but ping did not. After some digging, I found this post...
View ArticleProxmox Ceph storage configuration
These are my notes for migrating my VM storage from NFS mount to Ceph hosted on Proxmox. I ran into a lot of bumps, but after getting proper server-grade SSDs, things have been humming smoothly long...
View ArticleFix no internet in KVM/QEMU VMs after installing docker
I ran into a frustrating issue where my KVM VMs would lose network connectivity if I installed docker on my Arch Linux system. After some digging I finally discovered the cause (thanks to anteru.net)...
View ArticleFix cron output not being sent via e-mail
I had an issue where I had cron jobs that output data to stdout, yet mail of the output was never delivered. Everything showed fine in cron.log : Aug 3 21:21:01 mail CROND[10426]: (nicholas) CMD (echo...
View ArticleFix makemkv not compiling in Arch
I’ve had my Arch Linux desktop system for several years now. Over that time, cruft has built up. It bit me today when I tried to install makemkv. No matter what I tried I could not get it to compile....
View ArticleReplace unavail disk in ZFS
I had an issue where I removed a drive in my ZFS array and replaced it with a new drive which the OS gave the same device name (/dev/sdd). I had a hard time getting zfs to replace the drive until I...
View ArticleDigitize old photos and videos
Here is a list of hardware and software that I use to digitize old home movies, tapes, and family pictures: Hardware 35mm film scanner: Pacific Image PowerFilm Plus 35mm Film Scanner Document / picture...
View ArticleSSH through SOCKS5 proxy
I learned a neat trick to connect to ssh to a box over a SOCKS 5 proxy (ssh -D argument) thanks to this post. where <host> is the desired host and localhost:9999 is the address and port of your...
View ArticleConfigure Zimbra live replication
I’ve recently configured live active replication from my Zimbra e-mail server to a backup server. This is really slick – in the event of primary server failure, I can bring up my secondary in a matter...
View ArticleSaltstack gitfs ‘Failed to authenticate SSH session: Callback returned error’...
I lost several days of productivity with this one. I wanted to connect my Cent 7 salt master’s salt & pillar data to a gitfs backend. I configured /etc/salt/master per the docs but kept getting...
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