UNIX for Dummies Questions & Answers

 echo "kamaraj" | fold -w1 | sort | uniq -c

output :
      3 a
      1 j
      1 k
      1 m
      1 r

[house@leonov] cat code
#!/bin/bash

echo "$1" | fold -w1 | sort | uniq -c

exit 0
#finis
[house@leonov] bash code kamaraj
      3 a
      1 j
      1 k
      1 m
      1 r
[house@leonov] bash code 'some text'
      1
      2 e
      1 m
      1 o
      1 s
      2 t
      1 x

echo "kamaraj" | while read -n1 char; do echo $char;done | sort | uniq -c