Thread: Script to replace characters in text file

i have odd request, lets have text file this:

code:

__##___##___iiiiii  __##___##_____ii__  __##___##_____ii__  __#######_____ii__  __##___##_____ii__  __##___##_____ii__  __##___##___iiiiii

i want script replace of hash tabs random characters.

found command generate random character

apg -a1 -n1 -m1 -x1 -d

so guess need know how script search , replace using random character upon each successive find until end of file occurs. can me this?

this kinda works

#!/bin/bash
j in {1..31}
do
char=`apg -a1 -n1 -m1 -x1 -d`
echo $char
sed -i '0,/#/s/#/'$char'/' test.txt
done

resulted in this... wanted.

__qj___h;___iiiiii
__o1___=<_____ii__
__vs___y:_____ii__
__,=vr~?8_____ii__
__+~___>8_____ii__
__y*___+}_____ii__
__tu___3#___iiiiii

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