Posted on May 10, 2022
(Last modified on August 19, 2026)
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I have written about upgrading Growi before, but this time it is a major upgrade from 4.x to 5.x.
Assume that Growi is running on Docker with the configuration below
App Version Growi 4.5.19 mongodb 4.4 Note that if you are building it with docker for the first time, you can build it just as the official installation describes, so the work from here on is unnecessary
Get 4.x up to the latest version first If you are running it on docker, I think it is better to update 4.x to the latest version as far as you can, based on the official upgrade information below.
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Posted on March 30, 2022
(Last modified on August 19, 2026)
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After logging in to a certain Linux (Debian) machine, I ran into a symptom where I could not create files or directories.
Copy $ mkdir test mkdir: ディレクトリ `test' を作成できません: 許可がありません $ touch test touch: 'test' に touch できません: 許可がありません I tried various things
Logging in works normally Checked the UID and GID with the id command Checked the attributes of the home directory and its contents Tried changing the shell None of them showed a problem, and when I looked at the error log, there was an error like the one below
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Posted on March 30, 2022
(Last modified on August 19, 2026)
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I updated openssh with Homebrew on my Mac, and after the version went up I could no longer connect, with the error below.
Copy ERROR: Unable to negotiate with 192.168.1.10 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss The error did not appear for every destination; the ones I could no longer reach were those running relatively old operating systems.
SSH that can connect Copy $ ssh -V OpenSSH_8.4p1 Debian-5, OpenSSL 1.1.1k 25 Mar 2021 SSH that cannot connect Copy $ ssh -V OpenSSH_8.9p1, OpenSSL 1.1.1n 15 Mar 2022 Looking into it, the cause is that RSA keys with SHA-1 have been disabled since OpenSSH8.8
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Posted on March 22, 2022
(Last modified on August 19, 2026)
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At some point, somewhere around when I updated the CentOS7 kernel, it stopped booting properly.
When it boots, it gets stuck showing this screen and goes no further
Copy Wrning: /dev/centos_web/root does not exist Warning: /dev/mapper/centos_web-root does not exist Generating "/run/initramfs/sosreport.txt" Entering emergency mode. Exit the shell to continue. Type "journalctl" to view system logs. You might want to save "/run/initramfs/sosreport.txt" to a USB stick or /boot after mounting them and attach it to a bug report. dracut:/# I figured that something grub-related had probably broken or been misconfigured when the kernel was updated, so I googled it
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Posted on March 22, 2022
(Last modified on August 19, 2026)
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I first hit a case where the Esc key did nothing while editing with Vim in the web console of a guest OS on ESXi.
I could not leave insert mode, and of course the other keybindings did not work either.
I looked around the web in case others had seen the same thing.
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Posted on March 15, 2022
(Last modified on August 19, 2026)
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This article is a note on access restriction using Docker’s jwilder/nginx-proxy.
Incidentally, this is information that is also written in the official documentation
Basic authentication Create a .htpasswd folder inside the nginx-proxy folder Create a file named after the domain, in htpasswd format, under the .htpasswd folder Set .hpasswd as a volume in docker-compose.yml .htpasswd In the .htpasswd folder, create a file in htpasswd format named after the custom domain you want to protect with basic authentication
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Posted on March 14, 2022
(Last modified on August 19, 2026)
• Other languages:
日本語
It supports many social networks such as Facebook and Instagram, and acts as a hub-like fetching server that turns their updates into RSS.
If setting up a server sounds like too much trouble, or you just want to try it out, you might use one of the instances that anyone can access
RSS-Bridge on Docker I am building it with docker this time as well
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Posted on March 8, 2022
(Last modified on August 19, 2026)
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For about three years I had been running tinytinyRSS, or ttrss, on Docker.
There is still nothing wrong with it, but when updating it with docker-compose I also have to take dependencies such as mercury and opencc into account, and at this point FreshRSS has a simpler configuration and a good reputation, and FreeRSS came to be supported in Reeder5, the Mac app, as well, so I changed my RSS aggregator.
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Posted on March 4, 2022
(Last modified on August 19, 2026)
• Other languages:
日本語
Restrictions imposed by Twitter 2023/6/30 Because of Twitter's API restrictions and the restriction on viewing without logging in, fetching Twitter posts and so on through nitter is no longer possible
Building Nitter with Docker as described below is still possible, but it is of no use unless the restrictions on the Twitter side are lifted
Nitter is a Web client for Twitter, and
you can view it without having a Twitter account you can view it without logging in to Twitter no ads are inserted you can turn the timeline of a user or keyword you are interested in into RSS This time I build it myself with Docker, but Nitter has an official site and instances, and using those is fine, so there is no need to force yourself to build it
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Posted on March 4, 2022
(Last modified on August 19, 2026)
• Other languages:
日本語
I had a situation where I wanted to send SMTP from inside a Docker container, so I gave it a try using mailhog.
I based this almost entirely on the article above (in Japanese)
What I changed
Changed the Dockerfile image to almalinux Because centos8 is past EOL and an error came up when fetching packages
Added privileged: true to docker-compose.yml It did start with cap-add as well, but errors were being emitted
Send test
Once it has finished starting up, check inside the Docker container whether postfix can send on port 25.
Since relayhost uses mailhog’s port 1025, it is not actually sent to the real destination, so there is nothing to worry about
On the host side you can send on port 1025 as is
# telnet localhost 25Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 0d95f56f386c.example.com ESMTP Postfix
mail from: <[email protected]>
250 2.1.0 Ok
rcpt to: <[email protected]>
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
subject: mail testing
it is testing
.
250 2.0.0 Ok: queued as 367DF26008A
Leave the Docker container, access http://localhost:8025 in a browser on the host side, and if the mail has arrived you are done