About

Imported from chaterm/terminal-skills (linux/process-management/SKILL.md). Install upstream with npx skills add chaterm/terminal-skills --skill process-management. Copyright stays with the author.

Process Management

Name: process-management
Author: chaterm

Overview

Linux process viewing, signal handling, resource limiting and other management skills.

Process Viewing

ps Command

# Common formats
ps aux                              # All process details
ps -ef                              # Full format
ps -eo pid,ppid,cmd,%mem,%cpu       # Custom columns

# Find specific process
ps aux | grep nginx
ps -C nginx                         # By command name

# Process tree
ps auxf
pstree
pstree -p                           # Show PID

top/htop

# top interactive commands
top
# P - Sort by CPU
# M - Sort by memory
# k - Kill process
# q - Quit

# htop (more user-friendly)
htop

Other Tools

# Sort by resource
ps aux --sort=-%cpu | head -10      # Highest CPU
ps aux --sort=-%mem | head -10      # Highest memory

# View process details
cat /proc/PID/status
cat /proc/PID/cmdline
ls -la /proc/PID/fd                 # Open file descriptors

Signal Handling

Common Signals

# Signal list
kill -l

# Common signals
# SIGTERM (15) - Graceful termination (default)
# SIGKILL (9)  - Force termination
# SIGHUP (1)   - Reload configuration
# SIGSTOP (19) - Pause process
# SIGCONT (18) - Continue process

kill Command

# Terminate process
kill PID                            # Send SIGTERM
kill -9 PID                         # Force terminate
kill -HUP PID                       # Reload config

# Terminate by name
pkill nginx
pkill -9 -f "python script.py"

# Terminate all processes of a user
pkill -u username

# killall
killall nginx
killall -9 nginx

Background Tasks

Job Control

# Run in background
command &
nohup command &                     # Ignore hangup signal
nohup command > output.log 2>&1 &

# Job management
jobs                                # View jobs
fg %1                               # Foreground
bg %1                               # Background
Ctrl+Z                              # Pause current process

screen/tmux

# screen
screen -S session_name              # Create session
screen -ls                          # List sessions
screen -r session_name              # Resume session
Ctrl+A D                            # Detach session

# tmux
tmux new -s session_name
tmux ls
tmux attach -t session_name
Ctrl+B D                            # Detach session

Resource Limits

ulimit

# View limits
ulimit -a

# Set limits
ulimit -n 65535                     # Max file descriptors
ulimit -u 4096                      # Max processes
ulimit -v unlimited                 # Virtual memory

# Permanent settings /etc/security/limits.conf
# * soft nofile 65535
# * hard nofile 65535

cgroups

# View cgroup
cat /proc/PID/cgroup

# Limit CPU (systemd)
systemctl set-property service.service CPUQuota=50%

# Limit memory
systemctl set-property service.service MemoryLimit=512M

Common Scenarios

Scenario 1: Find and Kill Zombie Processes

# Find zombie processes
ps aux | awk '$8=="Z" {print}'

# Find parent process
ps -o ppid= -p ZOMBIE_PID

# Kill parent process
kill -9 PARENT_PID

Scenario 2: Find Process Using Port

# Find process using port 80
lsof -i :80
ss -tlnp | grep :80
netstat -tlnp | grep :80

# Kill process
fuser -k 80/tcp

Scenario 3: Monitor Process Resources

# Real-time monitor single process
top -p PID
watch -n 1 "ps -p PID -o %cpu,%mem,cmd"

# View files opened by process
lsof -p PID

Troubleshooting

Problem	Solution
Process unresponsive	`strace -p PID` to view system calls
CPU 100%	`top`, `perf top` to analyze hotspots
Memory leak	`pmap -x PID`, `/proc/PID/smaps`
Zombie process	Find parent process, restart or kill parent
Process OOM killed	`dmesg

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

yaml

targets:
  - https://api.opensmartroute.ai/api/v1/registry/chaterm-terminal-skills-process-management/manifest   # or paste the manifest below

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

chaterm-terminal-skills-process-management.ocm.jsonjson

{
  "ocm": "1",
  "id": "chaterm-terminal-skills-process-management",
  "kind": "skill",
  "name": "process-management",
  "description": "Linux process management and control",
  "publisher": "chaterm",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "general"
    ],
    "tags": [
      "skill-md",
      "linux",
      "process",
      "kill",
      "signal",
      "jobs",
      "skills-sh"
    ],
    "languages": [
      "en"
    ]
  },
  "quality_prior": 0.6,
  "examples": [
    "Linux process management and control"
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "skills.sh",
      "repository": "https://github.com/chaterm/terminal-skills",
      "path": "linux/process-management/SKILL.md",
      "ref": "HEAD",
      "url": "https://github.com/chaterm/terminal-skills/blob/HEAD/linux/process-management/SKILL.md",
      "key": "chaterm/terminal-skills/linux/process-management/SKILL.md"
    }
  },
  "instructions": "# Process Management\n\n## Overview\nLinux process viewing, signal handling, resource limiting and other management skills.\n\n## Process Viewing\n\n### ps Command\n```bash\n# Common formats\nps aux                              # All process details\nps -ef                              # Full format\nps -eo pid,ppid,cmd,%mem,%cpu       # Custom columns\n\n# Find specific process\nps aux | grep nginx\nps -C nginx                         # By command name\n\n# Process tree\nps auxf\npstree\npstree -p                           # Show PID\n```\n\n### top/htop\n```bash\n# top interactive commands\ntop\n# P - Sort by CPU\n# M -",
  "cost": {
    "context_tokens": 962
  }
}

Fetch it by URL: GET /api/v1/registry/chaterm-terminal-skills-process-management/manifest?version=1.0.0

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