小编aja*_*kel的帖子

如果反引号被美元括号语法替换,则以下代码无法生成二进制数:

#!/bin/bash
rm test.bin 2>/dev/null
for character in {0..255}
do
    char=`printf '\\\\x'"%02x" $character`
    printf "$char" >> test.bin
done
hexdump -C test.bin

结果:

00000000  00 01 02 03 04 05 06 07  08 09 0a 0b 0c 0d 0e 0f  |................|
00000010  10 11 12 13 14 15 16 17  18 19 1a 1b 1c 1d 1e 1f  |................|
00000020  20 21 22 23 24 25 26 27  28 29 2a 2b 2c 2d 2e 2f  | !"#$%&'()*+,-./|
00000030  30 31 …