写一个shell脚本执行时第一个参数为空时目标目录是当前目录第一个参数不为空时目标目录是参数值然后遍历目标目录所有文件利用dd命令将随机二进制数填充进所有文件文件大小保持不变

#!/bin/bash if [ -z "$1" ]; then target_dir="./" else target_dir="$1" fi

for file in "$target_dir"/*; do if [ -f "$file" ]; then filesize=$(stat -c%s "$file") dd if=/dev/urandom of="$file" bs=1 count="$filesize" conv=notrunc echo "Filled $file with random binary data." fi done

echo "Finished filling all files in $target_dir with random binary data."