bash

#!/bin/bash

count=0
while IFS= read -r line;
do
    [[ $line != *[[:digit:]]* ]] && count=$(( count + 1 ))
done < ~/.bashrc

printf 'We have %d number of lines without digits \n' "$count"


#!/bin/bash

COUNT=0

while read LINE;
do
      RESULT = $(echo $LINE | grep -L "[0-9]" | wc -l)

      if [ $RESULT -eq1 ]; then
            COUNT=$((COUNT+1))
      fi
done < ~/.bashrc

echo "Line count: $COUNT"

cat /etc/group | grep lightdm | tr -dc "0-9"

#!/bin/bash

for i in $(seq 1000)
do
    echo " $i " >> file name
done


i="1"

while [ $i -lt 5 ]
do
  touch "ex$i"
  i=$[$i+1]
done

sudo cat /etc/default/useradd | grep -v [0-9]$