100 lines
3.1 KiB
Markdown
100 lines
3.1 KiB
Markdown
# Misc Tips, TroubleShooting
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## Sending commands to LXD containers
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Use `bash -c "<command>"` for commands with wildcards. i.e.
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```bash
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for machine in $(lxc list | grep RUNNING | awk '{print $2}') ;\
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do lxc exec "${machine}" -- bash -c "cat /etc/apt/apt.conf.d/02*" ; done
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```
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fish shell is actually a little bit cleaner
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```fish
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for machine in (lxc list | grep RUNNING | awk '{print $2}') ; \
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lxc exec $machine -- bash -c "cat /etc/apt/apt.conf.d/02*" ; end
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```
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```fish
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# change all their time zones
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for machine in (lxc list | grep RUNNING | awk '{print $2}') ; \
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lxc exec $machine -- bash -c "timedatectl set-timezone America/Los_Angeles" ; end
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# check to see if anyone is logged in before rebooting
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for machine in (lxc list | grep RUNNING | awk '{print $2}') ; echo ; \
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echo $machine ; lxc exec $machine -- bash -c "who" ; end
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```
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## Move LXD container to another Server
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```bash
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# stop the container
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lxc stop <container name>
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# publish image of container to local *storage*
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lxc publish <container name> --alias <image name>
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# export the new image to tarball
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lxc image export <image name>
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# scp tarball to other box
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scp a4762b114fecee2e2bc227b9032405642c5286c02009babef7953e011e597bfe.tar.gz server:
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# on other box import the image
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lxc image import <tarball file name> --alias <image name>
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# launch container
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lxc launch <image name> <container name>
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# assign profile to container
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lxc profile assign <container name> <profile name>
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```
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Shell into the new running container, update any network interface
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configurations that you need to, and then restart the container.
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See also
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[LXD Container Home Server Networking For Dummies](lxd_container_home_server_networking_for_dummies.md)
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## Ubuntu-Mate-Welcome-Center doesn't work for some repos
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Perhaps your apt-cacher-ng proxy server isn't configured to allow
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traffic through from https sources. Make sure the following is
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uncommented. This applies for all PPA's that use https.
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```conf
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# /etc/apt-cacher-ng/acng.conf
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PassThroughPattern: .*
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```
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## Quitting Mosh
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The key combination to quit mosh it `ctrl+6+.`
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Also, WTF?
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## Updating Caddy Server
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You update Caddy Server with a new Go Binary, try to restart caddy.service, and it fails.
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Maybe you get an error message such as the following `listen tcp :80: bind: permission denied` and/or
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`listen tcp :443: bind: permission denied`.
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Fix this error with the following command `sudo setcap CAP_NET_BIND_SERVICE=+eip /path/to/caddy`
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## ZFS Disc Error Disc Identification
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You created a zpool using /dev/disk-by-id to specify the devices, and now you want to figure out
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which disks are causing you trouble. For instance, your system log, `journalctl | grep -i fail`
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shows read error on /dev/sdc.
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You can use `lsblk -o MODEL,SERIAL` to match the information generated by `zpool status`.
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## Byobu/Tmux copy mode
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1. Enter Copy Mode
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* in byobu use key `F7`
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* in tmux use `<prefix> [`
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2. Navigate around less/copy buffer using `h,j,k,l`
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3. Select text
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* `<space>` begins text selection
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* move cursor around using `h,j,k,l`
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* `<enter>` ends text selection
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4. Paste selection in any tmux/byobu window
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* in byobu use `alt+insert`
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* in tmux use `<prefix> ]`
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