---
title: xargs — pass results as arguments to execute
date: 2026-10-18
time: 12:00
model: admin
category: programs
author_type: human
summary: A tool that passes piped results as arguments to the next command for batch processing.
tags: program, Automation and scheduled tasks, xargs
---

**💬 "xargs command"**

xargs **converts standard input into command arguments**. It is essential when combined with find to process large numbers of files.

Use -n/-P to control batch size and parallel execution.

- **Concept**: Passes input lines as command arguments to execute.
- **-n**: Specifies the number of arguments to pass at once.
- **-P**: Specifies the number of parallel processes.
- **-I**: Specifies a position with a placeholder.
## Frequently used options

| Option | Description |
| --- | --- |
| -n <count> | Number of arguments to pass at once |
| -P <count> | Number of parallel executions |
| -I {} | Use a placeholder |
| -0 | Use NUL delimiter (safe for filenames with spaces) |

## 3 essential command combinations

- `find /var/log/app -name '*.log' -mtime +14 | xargs -r gzip` — compress old logs
- `find /srv/data -type f -print0 | xargs -0 -n 100 md5sum > /tmp/md5.txt` — safely checksum filenames with spaces
- `cat hosts.txt | xargs -P 8 -I {} ssh {} 'uptime -p'` — run commands on multiple servers in parallel
**💬 "Please share an easy example for first-time users"**

Here are common situations encountered on production servers, organized step by step.

### Step 1 · Check the target list

First, see what the targets are.

```
find /var/log/app -name '*.log' -mtime +14 | head
```

### Step 2 · Execute

Pass them to xargs to process.

```
find /var/log/app -name '*.log' -mtime +14 -print0 | xargs -0 -r gzip
```

### Step 3 · Verify

Check the results.

```
ls -1 /var/log/app/*.gz | wc -l
```

## How it is used in practice

### 1. Compress old logs

**Situation** — Compress logs older than 14 days to reduce disk usage.

```
find /var/log/app -name '*.log' -mtime +14 -print0 | xargs -0 -r gzip
```

**Result** — The target logs are compressed in bulk, freeing disk space.

**Point** — The -print0/-0 combination safely handles filenames with spaces.

### 2. Check multiple servers in parallel

**Situation** — Check the status of dozens of servers at once.

```
cat hosts.txt | xargs -P 8 -I {} ssh -o ConnectTimeout=3 {} 'uptime -p'
```

**Result** — It runs in parallel, greatly reducing the time required for checks.

**Point** — Adjust the parallel count based on the target load.

## Things to note

- Filenames with spaces break if processed without -0.
- Use -r to prevent the command from running when there are no targets.
- Excessive parallel execution with -P can burden target servers.
- Before deleting or modifying, check the target list first.
## Actual execution screen

This is the result of finding old logs, compressing them in bulk, and checking the count.

![xargs command execution result: bulk log compression](https://games.aidebatehub.com/assets/xargs-demo.png)

Production server

---
Source (HTML): https://games.aidebatehub.com/programs/linux/automation/xargs.html
This file is an auto-generated Markdown twin of the DevHub document.