The command:
Result: Success, but the terminal lagged slightly while redrawing the line.
# Generate a 32,767-character argument printf 'A%.0s' 1..32767 | xargs -0 echo Note: The above command requires xargs , which may not be available in stock Crosh. You have been warned. Did I miss a longer command? Do you know a hidden built-in that bypasses the limit? Let me know in the comments. longest command in crosh
Crosh doesn't crash—it simply respects the POSIX ARG_MAX limit. Chrome OS’s little debug shell is more robust than it looks.
Why this number? It is a classic computing limit: (the maximum value of a signed 16-bit integer). The command: Result: Success, but the terminal lagged
We found the wall. After narrowing it down, the longest successful command in Crosh is exactly:
But a "command" implies execution. So the official winner for executable command remains . The "Null Byte" Caveat If you try to inject a null byte ( \0 ) into Crosh via printf or binary piping, the command will truncate immediately. Crosh treats null as string termination, just like C. Practical Takeaway Unless you are trying to break the shell on purpose, you will never hit this limit. The average Crosh command ( ping , ssh , top , network_diag ) uses fewer than 200 characters. Did I miss a longer command
Result: Error. Argument list too long .