hexdump
hexdump
hexdump - display file contents in ascii, decimal, hexadecimal, or octal
hexdump - 以 ascii，十进制，十六进制或八进制显示文件内容
$ hexdump -h
hexdump: invalid option -- 'h'
Usage:
hexdump [options] file...
Options:
-b one-byte octal display
-c one-byte character display
-C canonical hex+ASCII display
-d two-byte decimal display
-o two-byte octal display
-x two-byte hexadecimal display
-e format format string to be used for displaying data
-f format_file file that contains format strings
-n length interpret only length bytes of input
-s offset skip offset bytes from the beginning
-v display without squeezing similar lines
-V output version information and exit
Example
$ echo "ABCDEFGHIJKLMNOPQRSTUVWXYZ" > test.txt
$ hexdump -b test.txt
0000000 101 102 103 104 105 106 107 110 111 112 113 114 115 116 117 120
0000010 121 122 123 124 125 126 127 130 131 132 012
000001b
$ hexdump -c test.txt
0000000 A B C D E F G H I J K L M N O P
0000010 Q R S T U V W X Y Z \n
000001b
$ hexdump -C test.txt
00000000 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f 50 |ABCDEFGHIJKLMNOP|
00000010 51 52 53 54 55 56 57 58 59 5a 0a |QRSTUVWXYZ.|
0000001b
$ hexdump -n 10 -C test.txt
00000000 41 42 43 44 45 46 47 48 49 4a |ABCDEFGHIJ|
0000000a
$ hexdump -n 10 -s 2 -C test.txt
00000002 43 44 45 46 47 48 49 4a 4b 4c |CDEFGHIJKL|
0000000c
$ hexdump -n 100 -C a.zip
00000000 50 4b 03 04 14 00 00 00 08 00 d6 84 fb 50 9d ef |PK...........P..|
00000010 c8 43 7a 5d 00 00 f5 c0 01 00 21 00 00 00 d0 c2 |.Cz]......!.....|
00000020 bd a8 ce c4 bc fe bc d0 2f 53 51 4c b4 f2 b7 d6 |......../SQL....|
00000030 d6 b5 2d b9 e6 d4 f2 bc f2 ca f6 2e 64 6f 63 ec |..-.........doc.|
00000040 5d 6b 57 db cc 11 fe dc 9e f3 fe 87 6d 7a 5a 20 |]kW.........mzZ |
00000050 c5 60 f9 86 45 42 5a 19 4c 4b 4b 20 0d a4 d7 d3 |.`..EBZ.LKK ....|
00000060 f6 08 23 c0 |..#.|
00000064