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copied!<p>using <code>read</code> a single char can be read at a time as follows: </p> <pre><code>read -n 1 c echo $c </code></pre> <p>[ANSWER] </p> <p>Try this: </p> <pre><code>#!/bin/bash # data file INPUT=/path/to/input.txt # while loop while IFS= read -r -n1 char do # display one character at a time echo "$char" done < "$INPUT" </code></pre> <p>From this <a href="http://www.cyberciti.biz/faq/linux-unix-read-one-character-atatime-while-loop/" rel="nofollow">link</a> </p> <hr> <p>Second method, Using <code>awk</code>, loop through char by char </p> <p><code>awk '{for(i=1;i<=length;i++) print substr($0, i, 1)}' /home/cscape/Desktop/table2.sql</code> </p> <hr> <p>third way, </p> <pre><code>$ fold -1 /home/cscape/Desktop/table.sql | awk '{print $0}' </code></pre> <hr> <p><strong>EDIT</strong>: To print each char as <code>HEX</code> number: </p> <p>Suppose I have a file name <code>file</code> : </p> <pre><code>$ cat file 123A3445F </code></pre> <p>I have written a <code>awk</code> script (<code>named x.awk</code>) to that read char by char from <code>file</code> and print into <code>HEX</code> : </p> <pre><code>$ cat x.awk #!/bin/awk -f BEGIN { _ord_init() } function _ord_init( low, high, i, t) { low = sprintf("%c", 7) # BEL is ascii 7 if (low == "\a") { # regular ascii low = 0 high = 127 } else if (sprintf("%c", 128 + 7) == "\a") { # ascii, mark parity low = 128 high = 255 } else { # ebcdic(!) low = 0 high = 255 } for (i = low; i <= high; i++) { t = sprintf("%c", i) _ord_[t] = i } } function ord(str, c) { # only first character is of interest c = substr(str, 1, 1) return _ord_[c] } function chr(c) { # force c to be numeric by adding 0 return sprintf("%c", c + 0) } { x=$0; printf("%s , %x\n",$0, ord(x) )} </code></pre> <p>To write this script I used <a href="http://www.gnu.org/software/gawk/manual/html_node/Ordinal-Functions.html" rel="nofollow">awk-documentation</a><br> Now, You can use this <code>awk</code> script for your work as follows: </p> <pre><code>$ fold -1 /home/cscape/Desktop/file | awk -f x.awk 1 , 31 2 , 32 3 , 33 A , 41 3 , 33 4 , 34 4 , 34 5 , 35 F , 46 </code></pre> <p>NOTE: <code>A</code> value is <code>41</code> in HEX decimal. To print in decimal change <code>%x</code> to <code>%d</code> in last line of script <code>x.awk</code>. </p> <p>Give it a Try!!</p>

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