Calculate mnemonic code from terminal I want to replicate mnemonic code with terminal.
the steps are:


Create a random sequence (entropy) of 128 to 256 bits.
Create a checksum of the random sequence by taking the first (entropy- length/32) bits of its SHA256 hash.
Add the checksum to the end of the random sequence.
Divide the sequence into sections of 11 bits.
Map each 11-bit value to a word from the predefined dictionary of 2048 words.
The mnemonic code is the sequence of words.


I can see this image 



And I take this entropy

0c1e24e5917779d297e14d45f14e1a1a


If I follow the image, I create the checksum

printf 0c1e24e5917779d297e14d45f14e1a1a | xxd -r -p | sha256sum -b


result

76e57a90f93135e97ce700a9e79196ba46315d65e696d0a4518270a8de3e80e4 


Then take 4 bits (0,5 byte => 1 char ) and append to my entropy with this result:

0c1e24e5917779d297e14d45f14e1a1a7


Now I have 132 bits And I have to split in 12 segments of 11 bits each

I try to convert in base 2

 echo "ibase=16; obase=2; 0C1E24E5917779D297E14D45F14E1A1A7" | bc

11000001111000100100111001011001000101110111011110011101001010010111111000010100110101000101111100010100111000011010000110100111


But the result is not correct, If I put that entropy in https://iancoleman.io/bip39/#entropy-notes I can see that result 

00001100000 11110001001 00111001011 00100010111 01110111100 11101001010 01011111100 00101001101 01000101111 10001010011 10000110100 0011010


But I don't understand How can I obtain that

00001100000 = 96 = army
Your binary (which includes the 4 checksum bits 0111, or 7) has the leading null's removed.

(0000)1100000 11110001001 00111001011 00100010111 01110111100 11101001010 01011111100 00101001101 01000101111 10001010011 10000110100 00110100111

Which is identical to the binary (without checksum bits 0111) from the web tool:

00001100000 11110001001 00111001011 00100010111 01110111100 11101001010 01011111100 00101001101 01000101111 10001010011 10000110100 0011010....

(Note the missing checksum bits .... at the end)