Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add chaterm/terminal-skills --skill user-permissionsgit clone --depth 1 https://github.com/chaterm/terminal-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/chaterm/terminal-skills/user-permissions)<a href="https://agentmods.dev/skills/chaterm/terminal-skills/user-permissions"><img src="https://agentmods.dev/badge/skills/chaterm/terminal-skills/user-permissions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/chaterm/terminal-skills/user-permissions"><img src="https://agentmods.dev/badge/skills/chaterm/terminal-skills/user-permissions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00009 | $0.01232 |
| Opus 5 | $0.00005 | $0.00616 |
| Sonnet 5 | $0.00002 | $0.00246 |
| Haiku 4.5 | $0.00001 | $0.00123 |
Grade B, and why
user-permissions scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
Linux user management, group management, sudo configuration, ACL permissions and other skills. How it starts
The opening of the file, as written. The whole thing — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.
User and Permission Management
Overview
Linux user management, group management, sudo configuration, ACL permissions and other skills.
User Management
View Users
# Current user
whoami
id
# User information
id username
finger username
# All users
cat /etc/passwd
getent passwd
# Logged in users
who
w
last # Login history
User Operations
# Create user
useradd username
useradd -m -s /bin/bash username # Create home directory, specify shell
useradd -G group1,group2 username # Specify supplementary groups
# Modify user
usermod -aG groupname username # Add to group
usermod -s /bin/zsh username # Change shell
usermod -L username # Lock user
usermod -U username # Unlock user
# Delete user
userdel username
userdel -r username # Also delete home directory
# Change password
passwd username
passwd -l username # Lock password
passwd -u username # Unlock password
chage -l username # View password policy
Group Management
View Groups
# User's groups
groups username
id -Gn username
# All groups
cat /etc/group
getent group
# Group members
getent group groupname
Group Operations
# Create group
groupadd groupname
groupadd -g 1001 groupname # Specify GID
# Modify group
groupmod -n newname oldname # Rename
# Delete group
groupdel groupname
# Manage group members
gpasswd -a username groupname # Add user
gpasswd -d username groupname # Remove user
gpasswd -M user1,user2 groupname # Set member list
sudo Configuration
Basic Usage
# Execute as root
sudo command
sudo -i # Switch to root shell
sudo -u username command # Execute as another user
# View permissions
sudo -l
sudoers Configuration
# Edit sudoers (recommended method)
visudo
# Or edit files under /etc/sudoers.d/
visudo -f /etc/sudoers.d/username
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 230 lines · 9 tokens per session scan B 7ccc4908f623
user-permissions is a skill published in the GitHub repository chaterm/terminal-skills (59 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 9 tokens to every session and 1,232 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
skillci-guardrails
Use this skill whenever you create, edit, or review a Claude Skill — any SKILL.md file, or the eval cases/config next to one. Most SKILL.md files today are written or edited by an agent, not typed by hand, so this closes the loop by having the agent that just wrote the skill also author it defensively and verify it…
example-skill
Writes a single changelog entry summarizing a code change, given a short description of what changed.
clean-skill
A skill with no lint issues, used as a starting point for the lint-on-type test.
skill-with-referenced-issue
Has a clean SKILL.md but an unsafe referenced script.
council
Run one request through several skills in parallel, isolated subagents, then merge their answers or judge the single best one. Use when the user invokes /council (or /council manage), or uses clear multi-skill-comparison language like "try this with a few different skills", "compare how different skills answer this"…
council-lite
Run one request through several approaches or skills one at a time, keeping each pass as independent as possible, then merge the answers or pick the best one. The claude.ai-compatible version of Council. Use when the user says things like "try this a few different ways and compare", "run this through several of my…