GNU nano 4.8 k
#!/bin/bash
#ew=`cat /dev/urandom | tr -dc 'A-Za-z0-9' | head -c 76`
#size=text.txt
FILENAME=~/test.txt
FILESIZE=$(stat -c%s "$FILENAME")
#echo "Size of $FILENAME = $FILESIZE bytes."
#echo size
bit=100050
while [ $FILESIZE -le 100050 ]
do
ew=`cat /dev/urandom | tr -dc 'A-Za-z0-9' | head -c 76`
echo "$ew" > ~/test.txt
done
#echo "$ew" > text.txt