Linux E2BIG (errno 7) — Argument List Too Long

Linux E2BIG error occurs when the combined size of program arguments and environment variables exceeds the kernel's ARG_MAX limit, commonly with glob expansions. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: E2BIG (errno 7) means the total size of arguments + environment exceeds ARG_MAX. Default ARG_MAX on modern Linux is approximately 2MB (varies by kernel version). Most commonly triggered by shell glob expansion: rm /path/to/dir/* with thousands of files. Both command-line arguments and environment variables count toward the limit. The limit applies to the execve() system call, not to shell built-in commands. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Shell glob (wildcard) expanding to thousands of file names. Very large environment (many or large environment variables). Script passing too many arguments to a command. find ... -exec command {} + accumulating too many file arguments. xargs without -n limit passing all input as one command. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Use find with -exec and \; (one at a time) instead of +: find /path -name '*.log' -exec rm {} \;. Use xargs with batching: find /path -name '*.log' -print0 | xargs -0 -n 100 rm. Use a for loop: for f in /path/to/dir/*; do rm "$f"; done. Check ARG_MAX: getconf ARG_MAX. Reduce environment size: env -i command runs with minimal environment. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Linux Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.