Blog of spblinux

Backup with rsync on qnap nas (architecture armel). Inside a private protected local network rsync (3.2.7) is running in daemon mode. Together with btrkbk to store snapshots. Debian 12 is the latest version of debian which supports my nas (qnap trs219p).

Having updated debian os, 2026-07, rsync stopped working with files bigger than 2GB – rsync error: file too large.
(dpkg -l | grep rsync shows: rsync_3.2.7-1+deb12u6)

Going back to version rsync_3.2.7-1+deb12u4 removed this error. (Possible background: debian maintainers backported the patches described here.)

Steps to downgrade from rsync patch version u6 to u4:

• as root user:
  • apt-get install build-essential fakeroot devscripts
  • apt build-dep rsync
• as normal user build deb package for rsync:
  • mkdir src; cd src
  • mkdir rsync3271u4; cd rsync3271u4
  • look up url of dsc file for rsync_3.2.7-1+deb12u4.dsc here (snapshot.debian.org)
  • dget DSC_URL
  • cd rsync-3.2.7
  • debuild -b -uc -us
• as root user:
  • tell debian apt to pin version u4 of rsync
  • create file /etc/apt/preferences.d/rsync
  • content of this file:
    Package: rsync
    Pin: version 3.2.7-1+deb12u4
    Pin-Priority: 1000
  • finally install rsync u4 from local deb package
  • dpkg -i rsync3271u4/rsync_3.2.7-1+deb12u4_armel.deb

Environment: Tablet (Android 11, 4GB RAM, 8 cores + keyboard with touchpad),
IDE VS Code (code-server 4.7+Volar+Vetur Extended, displayed by Chrome 104) running inside Termux

Steps to get the web browser based IDE VS Code with code-server up and running:

• Install Termux from F-Droid (terminal emulator and Linux environment app)
  • due to permission issues since android 10 the Termux app on Google Play Store is outdated (reference)
  • security settings on Android: allow installation of apk
  • open Termux console and run shell command pkg update to update all components of termux
• Install NodeJS inside Termux:
  • pkg install nodejs-lts
    • in my case I got EACCESS errors in /data/data/com.termux […] cacache/tmp which were resolved by temporarily switching from nodejs-lts to nodejs and back again:
      pkg uninstall nodejs-lts
      pkg install nodejs
      • a true solution would be to chown files in tmp dir of npm to the current user:
        • npm get tmp shows the tmp directory of npm
        • id shows user and group id of current user (uid, gid)
        • chown -R 12345:12345 PATH_TO_TMP/tmp/
          chown -R 12345:12345 tmp/
      • but Termux runs as restricted user and cannot change ownership
    • code-server, currently (2022-09), requires nodejs-lts
• Install dependencies to be able to build code-server
  • pkg install build-essential binutils python libsecret (reference, reference2)
• Use npm to install on global scope code-server
  • npm install -g code-server –unsafe-permissions (reference)
  • if code-server got installed but does not run because of missing modules (minimist, yauzl, yazl) then cd into /data/data/com.termux/files/usr/lib/node_modules/code-server/lib/vscode and run npm install –legacy-peer-deps (reference)
• Run code-server
  • code-server
    • either edit $HOME/.config/code-server/config.yaml and set your password
    • or run code-server –auth none (reference)
  • open http://localhost:8080 with your web browser
  • install extensions Volar and Vetur extended from code-server web interface
• Create a NuxtJS example app (reference)
  • use second session in Termux
    • open a second terminal inside Termux (keyboard shortcuts)ctrl+alt+c creates a new session
      • ctrl+alt+p or ctrl+alt+down arrow goes to previous session
      • ctrl+alt+n or ctrl+alt+up arrow goes to next session
      • ctrl+alt+right arrow opens session menu
      • (left arrow closes it; up/down switches sessions)
  • run yarn create nuxt-app hello-nuxt
    • this command does automatically install required packages
    • when asked:
      use java-script/packager yarn/no UI framework/no modules/no linting/no testing
      render universal (SSR / SSG)/deploy static/jamstack/no version control
    • cd into project directory hello-nuxt and run yarn dev
    • (later use yarn build and yarn start for production version;
      these commands are defined in the scripts section of file package.json.)
  • open http://localhost:3000
  • open project directory $HOME/hello-nuxt with explorer of code-server
    • edit pages/index.vue and save the changes
  • these changes, when saved, are immediately shown at http://localhost:3000
  • use copy and paste to replace index.vue by code of the NuxtJS hello world example code
  • open left pane of code sandbox at hello world example code and copy code of about.vue
  • create file about.vue inside explorer of code-server, paste code and save file

simple-code-editor is another example

• goto home directory and generate the nuxt framework with command
  yarn create nuxt-app nuxt-example2
  • accept defaults when asked, just press enter, except Deployment target: use Static and no Version control
• cd into this directory, cd nuxt-example2
• run npm install simple-code-editor
• with VS Code
  • hamburger menu on top left corner: File / Open Folder
    use folder nuxt-example2
  • open nuxt.config.js and add the line
    “simple-code-editor/nuxt”,
    inside the square brackets of modules: section
  • save nuxt.config.js
  • open pages/index.vue and edit the template section:
    • replace <Tutorial/> by
      <client-only>
      <CodeEditor value=”console.log(13)” width=”95%”
      :language_selector=”true” :languages=”[[‘cpp’,’C++’], [‘c’, ‘C’]]”></CodeEditor>
      </client-only>
    • save this file
    • use right click to delete Components/Tutorial.vue
• go back to Termux console and run yarn dev
• watch result with web browser, http://localhost:3000
• to compile the final version run
  • yarn build
  • yarn generate
• to show the content of folder dist/ at http://localhost:3000 run
  • yarn start
• to Download the contents of the dist folder use VS Code
  • click on refresh in explorer “…”
  • right click on dist folder and select Download (only available with desktop browser; see ssh port forwarding below)
  • choose the target folder and confirm
• to copy the dist folder to Android Documents folder (reference)
  • run termux-setup-storage
  • cp -R dist /sdcard/Documents/
  • mv /sdcard/Documents/dist/ /sdcard/Documents/code-editor2
• this folder may be delivered by almost any simple webserver, e.g. Simple HTTP Server app on Android

Sometimes it is more comfortable to use a desktop web browser, which is possible by port forwarding with ssh.

• open Termux console and install ssh by running pkg install openssh
• edit /data/data/com.termux/files/usr/etc/ssh/sshd_config, e.g. with editor nano
  • add the line
    AllowTcpForwarding yes
• use command whoami to display the linux user name used by android, e.g. u0_a250
• set a password for this user with command passwd
• make sure the android tablet is connected to local wifi and display the ip address with ifconfig
• start sshd with command sshd (sshd of Termux listens on port 8022)
• on the desktop pc run
  • ssh -p8022 -L3000:localhost:3000 -L8080:localhost:8080 u0_a123@192.168.123.123
    (replace u0_a123 with correct username and 192.168.123.123 with correct ip address)
  • open http://localhost:8080 and http://localhost:3000 with web browser

As a customer without cloud products volume licensing was done with a “normal” account of my organization: user@mydomain.xyz. Meanwhile a work or school account (WSA) is required. Reference.

Steps required, in my case, to change the existing account into a WSA account:

• Use what is called by microsoft Internal admin takeover (reference)
• (maybe the steps below depend on my first try to create a new account user@mydomainxyz.onmicrosoft.com account)
• open https://powerbi.com/ and create an account with the same email address as the existing account
• use this newly created account to open https://admin.microsoft.com/admintakeover (if asked during login wether private or business account use business account)
• the next steps cause that the newly created account, user@mydomain.xyz, is assigned to mydomain.xyz and to the role global admin
• you are instructed to create a dns txt entry at mydomain.xyz to verify your ownership of mydomain.xyz. (This txt dns entry can be removed after verification)
• logged in at admin.microsoft.ch at settings/domains mydomain.xyz should be displayed as standard domain
• now open microsoft volume licensing center, https://www.microsoft.com/Licensing/servicecenter/default.aspx and choose sign in with your work account, user@mydomain.xyz. Single sign on should work (if already logged in at admin.microsoft.com).
• Existing licenses should be displayed. Message to upgrade account to WSA should be gone. Done!