System · Ubuntu Setup Notes, Secondary

Aug 9, 2025 | Archived Work Software System

Notes

for a set of primary Ubuntu Setup Notes, see System · Ubuntu Setup Notes
for a set of Local File Copies, see here

ROS-2

Jazzy (Ubuntu 24.04) Ubuntu deb packages official install guide

if curl freezes during Enable required repositories, try proxychains

Humble (Ubuntu 22.04) Ubuntu deb packages official install guide
Using colcon to build packages official tutorial
- sudo apt install python3-colcon-common-extensions
ament_cmake user documentation official tutorial, CSDN post
ROS-2 commands cheatsheet
Online Robot URDF Viewer

VsCode

Official download page
See also in Local File Copies, Version: 1.96.2-1734607745, Architecture: amd64

VsCode Settings

Remote development using SSH, see official tutorial and official extension
Example settings in ~/.ssh/config to configure single-stage or multiple-stage SSH connections:

Configure C/C++ IntelliSense to find missing headers:
- press ctrl + shift + p, search for C/C++: Edit Configurations (UI), add paths to section Include path

Fold/Unfold code blocks:
- press ctrl + shift + p, search for Fold or Unfold, look for Fold/Unfold All, Fold Level X, ...
- press ctrl + shift + [, or ctrl + shift + ] to fold/unfold code blocks individually

Install ruby-rubocop dependency:

sudo apt install ruby-dev
sudo gem install rubocop

Wrap/unwrap opened file tabs:

press ctrl + ,, search for workbench.editor.wrapTabs, then check/uncheck to apply changes

Change tab and indent size:

press ctrl + shift + p, search for Preferences: Open User Settings, search for Editor: Tab Size, and apply changes
press ctrl + shift + p, search for Editor: Indent Size, apply changes to make it different from Editor: Tab Size if desirable

SMPlayer

Official download page
See also in Local File Copies, Version: 24.5.0-1~ubuntu-jammy, Architecture: amd64

WindTerm

Official github page
See also in Local File Copies, Version: 2.6.1, Linux Portable x86_64

To fix the reimport the Shell sessions issue, modify
vim ~/personal/apps/WindTerm_2.6.1/.wind/profiles/default.v10/user.config
or wherever config file is placed to include

Make a .desktop file for an app icon

Note the absolute paths with username in .desktop files, change them via
vim ~/.local/share/applications/windterm.desktop
and update applications discovery settings accordingly.

Proxy and Chains

If you use Qv2ray, it most likely uses socks5 proxy with a UDP local IP and port at 127.0.0.1:1089; you can setup and use proxychains as follows; for reference, see proxychains github repository, CSDN post, StackOverflow post

To enable proxy globally and test connections

Official download page
See also in Local File Copies, Version: 15.2.0.63064, Architecture: amd64

Ubuntu Realtime Kernel (22.04)

Pre-Commit and Virtualenv (22.04)

IBus Pinyin

Settings > Region & Language > Manage Installed Languages

Install / Remove Languages > Chinese (simplified) [✓]
Keyboard input method system > IBus
Apply System-Wide

Log Out

Settings > Keyboard > + Add Input Source...

Chinese > Chinese (Intelligent Pinyin) > Add

super + space > 中 > Preferences

Pinyin mode > Cloud Input Option > [✓] Enable Cloud Input

Sogou Pinyin (22.04)

Official download page
Official installation guide
See also in Local File Copies, Version: 4.2.1.145, Architecture: amd64

Settings > Region & Language > Manage Installed Languages

Install / Remove Languages > Chinese (simplified) [✓]
Keyboard input method system > Fcitx 4
Apply System-Wide

Log Out

Google Pinyin (22.04)

Lei Mao's post

Zsh and Oh My Zsh

Qv2ray

See also in Local File Copies, AppImage v2.7.0
See also in Local File Copies, icon png
See also in Local File Copies, Subscription Tutorial

Note that Qv2ray requires libfuse, Ubuntu 24.04 doesn't have it installed by default, in that case, you need to install it via:
- sudo apt install libfuse-dev
- otherwise, you will see the error message for missing libfuse if you run Qv2ray executable from terminal.

Make a .desktop file for an app icon

Note the absolute paths with username in .desktop files, change them via
vim ~/.local/share/applications/qv2ray.desktop
and update applications discovery settings accordingly.

Find and Wildcards

Some useful find commands, where /path and file can take wildcard characters *, ?, and []

Purpose	Command	Notes
Find by name	`find /path -name "file" 2>/dev/null`	Case-sensitive name matching
Case-insensitive find	`find /path -iname "file" 2>/dev/null`	Matches FILE, File, file, etc.
Recently modified files (days)	`find /path -mtime -7 2>/dev/null`	Files modified in last 7 days
Recently modified files (minutes)	`find /path -mmin -30 2>/dev/null`	Files modified in last 30 minutes
Find large files	`find /path -size +100M 2>/dev/null`	Files >100MB
Find regular files only	`find /path -type f -name "*.txt" 2>/dev/null`	`-type f` indicates regular files
Find directories	`find /path -type d -name "dir" 2>/dev/null`	`-type d` indicates directories
Find symbolic links	`find /path -type l 2>/dev/null`	`-type l` indicates symbolic links
Find sockets	`find /path -type s 2>/dev/null`	`-type s` indicates socket files

Basic wildcard characters explained

Wildcard	Function	Example
`*`	Matches any number of characters (including zero)	`*.txt` → all .txt files
`?`	Matches exactly one single character	`file?.log` → file1.log, fileA.log
`[]`	Matches any one character within the brackets; supports character lists `[abc]`, ranges `[a-z]`, and exclusion `[!abc]`	`image[1-3].jpg` → image1.jpg, image2.jpg, image3.jpg `[!0-9]*` → files not starting with a digit