Computer is miraculous!
Recently upgraded my DS1812+ memory, the backup job was stuck, but I don't know whether they are related. Because I was rebooting in the morning, but the backup was stuck at 4pm.
To fix the issue, run following command
sudo killall backupdSome people mentioned commands
sudo service com.apple.metadata.mds stop
sudo service com.apple.metadata.mds startBut there is no service command in my MacOS.
rmlintusageThe command rmlint can be used to dedup the files, which can support reflink.
I was using reflink dedup for BTRFS, but end up, I changed to hardlink. I think hardlink is more commonly used in Unix environment
rmlint -T df --config=sh:handler=hardlink /dedupThis will dedup the files in /dedup directory, and will generate a file called rmlint.sh in current directory. Run that shell script, will change duplicated files to hard link.
The -T df means dedup files.
The config=sh means generate shell script
The handler=hardlink means generate script using hardlink dedup
There are many options, but I don't use them.
I was changing harddisk in Synology DSM 7 in the volume with Docker package installed by recreating the volume, it requires docker package to be removed. I thought the docker folder (/volumeX/docker) might not removed, so backed up the container images into docker folder. But I was wrong, the docker folder was removed.
The docker folder was created by Docker package, which can be moved to other volume after stopped Docker package. I didn't see any data in it, and I don't know what the usage of this folder is and it is zero in size.
To trust self generated CA from client system, following steps can be used.
Click on lock icron beside address bar of browser, then view certificates.
The self generated CA certificate normally can be found in server, such as xxxx.ca.crt.
mmcIn Firefox, which has its own certificate store, the system certificates are not accepted. So use following steps to enable system certificates to be used for current user.
true by double click the line.Note: This only enable trust for current user
Got following error when starting VM
No 3D Support is available from the Host - The 3D features of the virtual machine will be disabledAdd following lines in .vmx file
mks.enableMTLRenderer = "0"
mks.enableGLRenderer = "1"Docker requires legacy iptables. If docker installation got network issue, following commands might fix the issue.
sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
apt remove apparmorUse environment variable RSYNC_PASSWORD to provide password to rsync command
export RSYNC_PASSWORD=$PASSWORD
rsync -zvr source destinationor
env RSYNC_PASSWORD=$PASSWORD rsync -zvr source destinationrsync --password-file=rsync_pass -zvr source destinationSuch as sshpass and public key.
How can I rsync without prompt for password, without using public key authentication?
Use docker pull command can get image digest
docker pull registry.example.com/image_path/image:tagIf it is daily build for container backup purpose, the tag can be in date format, such as YYYYMMDD. The output can be
20210624: Pulling from image_path/image
...
22b5d63ad977: Already exists
8e2e66517d7e: Pull complete
Digest: sha256:7535af1f65524f9200b901fc31b9c779819e45c0502ef99605666842a319908fThe digest is also printed when deleting it.
docker rmi registry.example.com/image_path/image:tagSample output as below
Untagged: registry.example.com/image_path/image:tag
Untagged: registry.example.com/image_path/image@sha256:e300ff463dc18c7b3bf3964dc5a9832f613d829285a0da49e5fd37519dc7d0fc
Deleted: sha256:35baba3d5948b5844b67adcd6a236905039e929f8647d4e4afc9e64e9460d557
Deleted: sha256:bd681f3956f55dc028bae7ca4c2657457824a0e356c59705302fb084660a669bNote: The Digest is the second tag, the sha256 in the first Deleted message is allowed to be deleted too, but the sha256 in the second Deleted message was not. Don't understand why
curl -v --silent -H "Accept: application/vnd.docker.distribution.manifest.v2+json" -X GET https://$USER:$PASSWORD@registry.example.com/v
2/image_path/image/manifests/tag 2>&1 | grep Docker-Content-Digest | awk '{print ($3)}'curl https://$USER:$PASSWORD@registry.example.com/v2/image_path/image/manifests/sha256:xxxxxxxxxxxxxxxxcurl -X DELETE https://$USER:$PASSWORD@registry.example.com/v2/image_path/image/manifests/sha256:xxxxxxxxxxxxxxxxdocker exec registry bin/registry garbage-collect --delete-untagged /etc/docker/registry/config.ymldocker restart registryNextCloud shows Internal Server Error on first page.
In docker log, shows following message
Class 'OCP\\User' not foundand it points to following file
/data/nextcloud/apps/epubreader/lib/Hooks.phpThere was an warning message pointing to epubreader app, shows untruested source, but after I reinstalled it, the message disappered.
Access docker
docker exec -it nextcloudpi bashMove the epubreader app to /tmp directory.
mv /data/nextcloud/apps/epubreader/ /tmp/Restart NextCloudPi docker container
After fixed, if try to install EPUB/CBZ/PDF ebook reader app again, following message appears.
Error: This app cannot be enabled because it makes the server unstableIf force install it, NextCloud will appear Internal Server Error again.
Today, got RockPro64 and 10 SATA ports PCI-E card. Will try it once got time.
