UNIX for Dummies Questions & Answers

sed -e "s/^.\{52\}\(.\).*/\1/g" input.txt | grep -c 0

sed -e "s/^.\{52\}\(.\).*/\1/g" input.txt | grep -c 1

grep -c -e "^.\{52\}1" input.txt

grep -c -e "^.\{52\}0" input.txt

[/tmp]$ cat t
1010101
10010101
0101010
10101001
[/tmp]$ grep -c -e "^.\{6\}0" t
3
[/tmp]$ sed -e "s/^.\{6\}\(.\).*/\1/g" t | grep -c 0
3
[/tmp]$ grep -c -e "^.\{6\}1" t
1
[/tmp]$ sed -e "s/^.\{6\}\(.\).*/\1/g" t | grep -c 1
1
[/tmp]$