#

| Chapter 51 Miscellaneous Useful Programs and Curiosities |

## 51.11 Making an Arbitrary-Size File for Testing

The yes command (23.4) outputs text over and over. If you need a file of some size for testing, make it with yes and head (25.20). For example, to make a file 100k (102,400) characters long, with 12,800 8-character lines (7 digits and a newline), type:

>     % yes 1234567 | head -12800 > 100k-file

> NOTE: On some UNIX systems, that command may "hang" and need to be killed with CTRL-c - because head keeps reading input from the pipe. If it hangs on your system, replace `head -12800` with `sed 12800q`.

- JIK, JP

51.10 The date Command |  | 51.12 You Don't Have Enough Smileys?