幾個小工具

fc
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Windows底下有個程式fc，可以比較兩個檔案的不同之處，並以16進位的方式輸出

Linux版:::

    cmp -l $1 $2 | awk '{printf "%08X %02X %02X\n", $1, strtonum(0$2), strtonum(0$3)}'

bwrite [filename] [offset(10進位)] [data] [data_size]
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非常簡單的存檔修改法

    printf $3 | dd of="$1" bs=1 seek=$2 count=$4 conv=notrunc
   
10進位 > 16進位
===========================

     printf '%x\n' 346
   
16進位 > 10進位
===========================

    echo $((0xff))

Reference:

• diff - How do I compare binary files in Linux? - Super User
• shell - CLI: Write byte at address (hexedit/modify binary from the command line) - Stack Overflow
• Linux Commando: Quick hex / decimal conversion using CLI